All Wiring Diagrams for Cadillac STS 2005

AIR CONDITIONING

Automatic A/C Wiring Diagram (1 of 3) for Cadillac STS 2005

List of elements for Automatic A/C Wiring Diagram (1 of 3) for Cadillac STS 2005:

rear air temp sens low ref
(in dash harn, 35 cm from c214)
(in dash harn, 51 cm from left front dash speaker conn)
5 volt ref
5 volt reference
A/c comp clutch relay
A/c ref low temp sens sig
A10
A11
A12
After boil coolant pmp rel
Air quality hc sens sig
Air quality nox sens sig
Air temp door ctrl
Air temp door ctrl low ref
Air temp dr position signal
Amb air temp sensor sig
Ambient light sensor sig
Ambient light sensor signal
B10
B11
B12
Battery
Blower fuse 40a
Blower mtr speed ctrl
Blower relay
Ccp fuse 10a
Comp cltch fuse 10a
Coolant level switch signal
Evaporator temperature sensor (inside hvac case, at evaporator core)
G201 (behind right kick panel)
Ground
Hot at all times
Hot in run
Hot in run or start
Hvac control module (in center of dash, below radio)
Ignition 1 voltage
Ignition 3 volt
Ignition 3 voltage
Inside air temp sensor sig
Inside air temperature sensor (on dash, right of steering column)
Interior lights system
Led backlight dimming cntrl
Left sunload sensor signal
Low ref
Low reference
Low spd gm/lan serial data
Lower mode door ctrl
Lower mode dr pos signal
Med blower motor ctrl
Mode door ctrl
Nca
Outside amb temp low ref
Pass air temp door ctrl
Pass air temp dr posit sig
Pass air temp motor ctrl
Pass solar sensor signal
Pnk
Power distribution system
Power seat system (heated seat circuit)
R51
R52
R53
R54
R55
R56
R57
R58
Rear air temp motor cntrl
Rear air temp sens sig
Rear mode door control b
Rear mode dr control a
Rear mode pos signal
Rear mode switch sig
Rear temp switch sig
Recirc door ctrl
Recirc door pos sig
Recirc dr cntrl
Recirc dr pos sig
Recirculation actuator (on hvac module, left of blower motor)
Right sunload sensor signal
S202
S210
S211 (in dash harn, 28 cm from c214)
S222 (in hvac motor assembly harn)
Solar sensor driver signal
Solid state
Sunload sensor (center of dash, in defrost grill)
Tan
Underhood fuse block (right front side of engine compartment)
Wash noz/ aqs fuse 10a

Automatic A/C Wiring Diagram (2 of 3) for Cadillac STS 2005

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List of elements for Automatic A/C Wiring Diagram (2 of 3) for Cadillac STS 2005:

(3.6l)
(4.6l)
(front center of right
(in dash harness, 42 cm from sp201) s231
(in hvac motor harness)
(inside center console, on right rear side) auxiliary mode actuator
(not used) s3
A/c
A/c compressor clutch
Air qual hc sens
Air qual nox sens
Air quality sensor (if equipped) (under front facia, near center of grille)
Blower controller (in pass compt, under dash, behind glove box)
Blower motor (under dash, behind glove box)
Blower mtr fan control
Blower mtr speed ctrl
Cold
Cylinder head) g113
Def
Driver air temperature actuator (on left side of hvac module)
Dry air temp signal
Front passenger air temperature actuator (on right side of hvac module)
G100 (rear side of right cylinder head)
G104 (on right front frame rail, near bumper bracket)
G201 (behind right kick panel)
Ground
Hot
Hot w/ ign 1 relay energized
Ign 1 fuse 10a
Ign 1 voltage
Low ref
Mode actuator (on top left side of hvac module)
Mode valve signal
Pass air temp signal
Pnk
Power seat system (heated seat circuit)
Rear passenger air temperature actuator (left center of dash, on lower left side of hvac module)
Right rear fuse block (under right side of rear seat)
S212 (in dash harness, 38 cm from ipm c3)
S223
Splice pack
Tan

Automatic A/C Wiring Diagram (3 of 3) for Cadillac STS 2005

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List of elements for Automatic A/C Wiring Diagram (3 of 3) for Cadillac STS 2005:

(near left front strut tower) g101
(on right front frame rail, near bumper bracket) g104
3.6l
4.6l
5v reference
A/c clutch relay ctrl
A/c refrig press sensor
A/c refrigerant pressure sensor (near the left front strut tower)
After boil fuse 10a
After boil heater pump (4.6l)
After boil relay (4.6l)
Ambient air temperature sensor (under front facia, near center of grille)
Computer data lines system
Coolant level switch (in bottom of coolant reservoir)
Ect sensor signal
Engine control module (ecm) (front of engine, on right valve cover)
Engine control module (ecm) (on left front frame rail, below left headlight assembly)
Engine controls system
Engine coolant hot
Engine coolant low level
Engine coolant temperature (ect) sensor (3.6l: center of left cylinder head) (4.6l: rear side of right cylinder head)
Feed
G100 (on rear side of right cylinder head)
Hi speed fan relay
Hi speed fan relay ctrl
High fan fuse 30a
Hot at all times
Instrument panel cluster
Left cooling fan (behind radiator)
Lo speed fan relay
Logic
Low fan fuse 30a
Low reference
Low speed fan relay ctrl
Main relay
Main relay ctrl
Message center
Pnk
R14
R15
R16
R17
R18
R19
R20
R21
R22
R26
R27
R29
R30
R39
R40
R41
R42
R47
R48
R49
R50
Radio
Right cooling fan (behind radiator)
Right rear fuse block (under right side of rear seat)
Rtn
S/p fan relay
S107 (3.6l) (in engine harn, 36 cm from brake pressure sensor connector)
S108 (3.6l) (in engine harness, 28 cm from maf sensor connector)
S120 (3.6l) (in engine poa harness 21 cm from throttle body assembly connector)
Serial data
Sig
Splice pack sp201 (in dash harn, under dashboard, near firewall grommet)
Tan
Underhood fuse block (right front side of engine compartment)

Compressor Wiring Diagram for Cadillac STS 2005

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List of elements for Compressor Wiring Diagram for Cadillac STS 2005:

(3.6l)
(4.6l)
(front center of right
(not used) s3
3.6l
4.6l
5v reference
A/c clutch relay ctrl
A/c comp clutch relay
A/c compressor clutch
A/c refrig press sensor
A/c refrigerant pressure sensor (near the left front strut tower)
Comp cltch fuse 10a
Computer data lines system
Cylinder head) g113
Engine control module (ecm) (front of engine, on right valve cover)
Engine control module (ecm) (on left front frame rail, below left headlight assembly)
Engine controls system
Feed
G100 (rear side of right cylinder head)
Hot at all times
Hot w/ ign 1 relay energized
Ign 1 fuse 10a
Low reference
Pnk
R55
R56
R57
R58
Right rear fuse block (under right side of rear seat)
Rtn
S107 (3.6l) (in engine harn, 36 cm from brake pressure sensor connector)
S108 (3.6l) (in engine harness, 28 cm from maf sensor connector)
Serial data
Sig
Splice pack
Tan
Underhood fuse block (right front side of engine compartment)

ANTI-LOCK BRAKES

Anti-lock Brakes Wiring Diagram (1 of 2) for Cadillac STS 2005

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List of elements for Anti-lock Brakes Wiring Diagram (1 of 2) for Cadillac STS 2005:

(left side of power steering gear) variable effort steering actuator
(on right front corner of engine compt) electronic brake control module (ebcm)
5-volt reference
A10
A11
A12
A13
A14
Abs fuse 15a
B + sol vlv cntrl
B+ motor control
B10
B11
B12
B13
B14
Battery
Brake fluid pressure sensor sig
Brake pressure modulator valve (bpmv)
C10
Computer data lines system
Ebcm fuse 50a
G104 (on right front frame rail)
G110 (on right front frame rail)
Ground
Hi spd gmlan ser data +
Hi spd gmlan ser data -
Hi spd gmlan ser data w/u
High effort ctrl
Hot at all times
Hot in run or start
Ign 1 relay
Ign 3
Lateral accelerometer signal
Left front inlet
Left front iso- lation
Left front outlet
Left front prime
Left rear inlet
Left rear outlet
Lf wheel speed sens low ref
Lf wheel speed sens sig
Long accelerometer signal
Low effort ctrl
Low reference
Lr wheel speed sens low ref
Lr wheel speed sens sig
Pnk
R43
R44
R45
R46
Rf wheel speed sens low ref
Rf wheel speed sens sig
Right front inlet
Right front iso- lation
Right front outlet
Right front prime
Right rear inlet
Right rear outlet
Rr wheel speed sens low ref
Rr wheel speed sens sig
S100
Solenoid valves
Steering wheel position sig a
Steering wheel position sig b
Tan
Underhood fuse block (right front side of engine compt)
Yaw rate sensor signal

Anti-lock Brakes Wiring Diagram (2 of 2) for Cadillac STS 2005

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List of elements for Anti-lock Brakes Wiring Diagram (2 of 2) for Cadillac STS 2005:

(3.6l: in engine harn, 30 cm from ebcm conn) (4.6l: in engine harn, 25 cm from brake pressure sensor conn)
(behind left front brake rotor) left front wheel speed sensor (wss)
(behind left rear brake rotor)
(behind right front brake rotor) right front wheel speed sensor (wss)
(behind right rear brake rotor) right rear wheel speed sensor (wss)
5v ref
5v reference
Abs ind
Brake fluid pressure sensor (on rear of ebcm)
Brake pedal position sensor (attached to top of brake pedal assembly)
Computer data lines system
Ebcm gmlan
G201 (behind right kick panel)
Hi spd gmlan ser data +
Hi spd gmlan ser data -
Hi spd gmlan ser data w/u
Ign
Instrument panel cluster (ipc)
Instrument panel module (ipm) (behind glove box)
Interior lights system
Lateral accelerometer sig
Left rear wheel speed sensor (wss)
Lo spd gmlan ser data
Logic
Long accelerometer sig
Low ref
Low reference
S117 (in engine harn, 36 cm from ebcm conn)
S118
S311
Steer wheel pos sig a
Steer wheel pos sig b
Steering angle sensor (on base of steering column)
Tan
Traction control ind
Traction control switch
Yaw rate & lateral acceleration sensor (under front passenger seat)
Yaw rate sens signal

ANTI-THEFT

Anti-theft Wiring Diagram for Cadillac STS 2005

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List of elements for Anti-theft Wiring Diagram for Cadillac STS 2005:

3.6l
4.6l
Battery b+
Class 2 (sdm)
Computer data lines system
Door open sw sig
Door open switch
Driver door latch assembly
Driver door module (ddm)
Engine control module (ecm) (3.6l: on right valve cover) (4.6l: below left headlamp assembly)
Engine controls system
Exterior lights system
Front passenger door latch assembly
Front passenger door module (fpdm)
Fuel pump ctrl
G104 (on right front frame rail)
G200 (behind left kick panel)
G201 (behind right kick panel)
G402 (in rear compt, rear of left shock tower)
Gmlan serial data
Ground
High spd gmlan+
High spd gmlan-
Hood ajar switch (right front strut tower)
Hood closed sig
Hood open sig
Horn ctrl
Horns system
Hot at all times
Hot w/ ign 1 relay energized
Ign
Ignition 1 voltage
Instrument panel cluster (ipc)
Instrument panel module (ipm) (behind right side of dash)
Interior lights system
Left rear door latch assembly
Left rear door module (lrdm)
Low spd gmlan
Low spd gmlan data
Park lamp ctrl
Pnk
Rear integration module (rim) (under left side of rear shelf)
Remote control door lock receiver (rcdlr) (under rear speaker shelf)
Right rear door latch assembly
Right rear fuse block (under right side of rear seat)
Rim fuse 10a
S10
S11
S20
S22
S500
S600
S700
S800
Security ind
Splice pack
Starter enable
Starting/ charging system
Tan
Trunk ajar sig
Trunk diode
Trunk lid release actuator
Underhood fuse block (in engine compt, next to left strut tower)

BODY CONTROL MODULES

Instrument Panel Module Wiring Diagram for Cadillac STS 2005

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List of elements for Instrument Panel Module Wiring Diagram for Cadillac STS 2005:

5v ref
Acc ind ctrl
Acc voltage
Air conditioning system
Anti-lock brakes system
Backlight lamps ctrl
Bat pos voltage
Computer data lines system
Courtesy lamp sw on sig
Cruise control system
Cruise ctrl set/coast/res/acc sw sig
Current sens low ref
Current sens sig
Current sens sply voltage
Ecm/tcm serial data wake up
Electronic power steering system
Exterior lights system
Flash to pass sw sig
Flash to pass sw sply voltage
Fog lamp rly ctrl
Frt fog lamp sw sig
G101 (near left front strut tower)
G201 (behind right kick panel)
Gnd
Hazard sw sig
Hdlamp auto high beam dim status
Hdlmp auto high beam dim enable
Hdlmp rly ctrl/hdlmp hi beam rly ctrl
Headlamp sw headlamp on sw
Headlamp washer rly ctrl
Headlights system
Hi/low beam rly ctrl
High spd gmlan serial data (+)
High spd gmlan serial data (-)
High spd gmlan serial data wake up
Horn rly ctrl
Horns system
Hot at all times
Hot w/ park lamp relay energized
I/p lamps dimmer sw sig
Ign mode sw sply voltage
Instrument cluster system
Instrument panel module (ipm) (behind glove box)
Interior lights system
Ipm ign mode data sig
Ipm ign mode sw ref voltage
Ipm/ aldl fuse 10a
Led backlight dim ctrl
Lf turn sig sw sig
Lic dimming fuse 7.5a
Low spd gmlan serial data
Mirrors system
Off ind ctrl
Park brake sw sig
Park lamp rly ctrl
Park lamp sw on voltage
Pnk
Power distribution system
Rear fog lamp sw sig
Remote radio ctrl hd acc sply voltage
Rf turn sig sw sig
Run ign 3 voltage
Run/crank ign 1 voltage
S210
Shft sel sw prk sig
Shft sel sw prk sply voltage
Shift interlock system
Sig gnd
Starter ind ctrl
Starting/charging system
Stop lamp sw sig
Strg col radio ctl sig
Strg col tilt/tele dn sw sig
Strg col tilt/tele fwd sw sig
Strg col tilt/tele rwd sw sig
Strg col tilt/tele up sw sig
Tan
Tap up/dn enable sig
Traction ctrl sw sig
Trunk rel rly ctrl
Trunk, tailgate, fuel doors system
Twilight sentinel dly sig
Underhood fuse block (right front side of engine compt)
Volt check fuse 10a
Windshield washer fluid lvl sig
Windshield wiper sw on sig
Windshield wiper sw sig
Wiper/washer system

Rear Integration Module Wiring Diagram for Cadillac STS 2005

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List of elements for Rear Integration Module Wiring Diagram for Cadillac STS 2005:

Anti-theft system
Bat pos voltage
Courtesy lamp sply voltage
Courtesy lmp rly coil ctrl
Defogger system
Exterior lights system
G402 (rear of left rear shock tower)
Gnd
Hood closed sw sig
Hood open sw sig
Hot at all times
Hot w/ ign 1 relay energized
Interior lights system
Interior lmp ctrl
Left turn signal fuse 10a
Lf turn sig lmp sply voltage
Low spd gmlan serial data
Lr stop/turn lmp sply voltage
Lr turn signal lmp sply voltage
Navigation system
Pnk
Power distribution system
Power tops system
Rap rly coil ctrl
Rear defog rly ctrl
Rear integration module (rim) (left side of rear compartment, under rear shelf)
Rear parking assist chime sig
Rev rly coil feed
Rf turn sig lmp sply voltage
Right rear fuse block (under right side of rear seat)
Right turn signal fuse 10a
Rim fuse 10a
Rr stop/turn lmp sply voltage
Rr turn sig lmp sply voltage
Run/crank ign 1 voltage
S11
Sig gnd
Splice pack
Standing lmp rly feed
Tan
Trunk ajar sw sig
Trunk rel rly output-coil
Trunk, tailgate, fuel doors system

COMPUTER DATA LINES

Computer Data Lines Wiring Diagram (1 of 2) for Cadillac STS 2005

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List of elements for Computer Data Lines Wiring Diagram (1 of 2) for Cadillac STS 2005:

3.6l
4.6l
A11
B10
B11
B12
Data link connector (dlc) (under lower left side of dash)
Distance sensing cruise control module (behind front fascia, near hood latch)
Electronic brake control module (ebcm) (right front corner of engine compt, behind right wheel)
Electronic suspension (esc) control module (below right "c" pillar)
Engine control module (ecm) (3.6l: front of engine, on right valve cover) (4.6l: on left front frame rail, below left headlamp)
From sp303 (diagram 2 of 2)
G200 (behind left kick panel)
Headlamp leveling module
High speed gmlan data wake-up
High speed gmlan data wakeup
High speed gmlan ecm/ tcm wakeup
High speed gmlan serial data bus +
High speed gmlan serial data bus -
Hot at all times
Instrument panel module (ipm) (right side of dash, behind glove box)
Ipm/ aldl fuse 10a
Low speed gm lan serial data
Low speed gmlan serial data
S113 (in engine harn, 19 cm from ho2s bank 1 sensor 1)
S116 (forward lamp harn, 31 cm from right headlamp leveling actuator)
Splice pack sp100 (behind left center of front bumper)
Splice pack sp201 (under dash, near firewall grommet)
Tan
To sp201 (diagram 2 of 2)
Transmission control module (tcm) (right front corner of engine compt)
Underhood fuse block (right front side of engine compartment)
Vehicle communication interface module (vcim) (in rear compt, near right strut tower)

Computer Data Lines Wiring Diagram (2 of 2) for Cadillac STS 2005

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List of elements for Computer Data Lines Wiring Diagram (2 of 2) for Cadillac STS 2005:

Audio amplifier
Digital radio receiver
Driver door module (ddm) (in door)
Driver door switch assembly (in door)
From instrument panel module (ipm) (diagram 1 of 1)
Front passenger door module (fpdm) (in door)
Head up display (hud)
Hvac control module (in center of dash, below radio)
Inflatable restraint sensing & diagnostic module (sdm) (under rear of center console)
Instrument panel cluster (ipc)
Left rear door module (lrdm) (in door)
Low speed gm lan serial data
Memory seat module (msm) (under driver seat)
Radio
Rear integration module (rim) (under left side of package shelf)
Remote control door lock receiver (under package shelf)
Right rear door module (rrdm) (in door)
Splice pack sp201 (under dash, near firewall grommet)
Splice pack sp300
Splice pack sp303 (on right frame rail, near right side of seat)
Steering column lock control module (left side of steering column)
To vehicle communication interface module (vcim) (diagram 1 of 1)
Tv antenna module (below left side of package shelf)

COOLING FAN

Cooling Fan Wiring Diagram for Cadillac STS 2005

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List of elements for Cooling Fan Wiring Diagram for Cadillac STS 2005:

(near left front strut tower) g101
(on right front frame rail, near bumper bracket) g104
3.6l
4.6l
A11
After boil coolant pmp rel
After boil fuse 10a
After boil heater pump (4.6l)
After boil relay (4.6l)
Computer data lines system
Coolant level switch (in bottom of coolant reservoir)
Coolant level switch signal
Ect sensor signal
Engine control module (ecm) (front of engine, on right valve cover)
Engine control module (ecm) (on left front frame rail, below left headlight assembly)
Engine coolant hot
Engine coolant low level
Engine coolant temperature (ect) sensor (3.6l: center of left cylinder head) (4.6l: rear side of right cylinder head)
G100 (on rear side of right cylinder head)
Hi speed fan relay
Hi speed fan relay ctrl
High fan fuse 30a
Hot at all times
Hvac control module (in center of dash, below radio)
Instrument panel cluster
Left cooling fan (behind radiator)
Lo speed fan relay
Logic
Low fan fuse 30a
Low reference
Low spd gm/lan serial data
Low speed fan relay ctrl
Main relay
Main relay ctrl
Message center
Pnk
R14
R15
R16
R17
R18
R19
R20
R21
R22
R26
R27
R29
R30
R39
R40
R41
R42
R47
R48
R49
R50
Radio
Right cooling fan (behind radiator)
Right rear fuse block (under right side of rear seat)
S/p fan relay
S120 (3.6l) (in engine poa harness 21 cm from throttle body assembly connector)
Serial data
Splice pack sp201 (in dash harn, under dashboard, near firewall grommet)
Tan
Underhood fuse block (right front side of engine compartment)

CRUISE CONTROL

3.6L VIN 7

3.6L VIN 7, Cruise Control Wiring Diagram for Cadillac STS 2005

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List of elements for 3.6L VIN 7, Cruise Control Wiring Diagram for Cadillac STS 2005:

(in steering column)
(on brake pedal support)
5 volt reference
Accy supp voltage
Brake pedal pos sensor signal
Brake pedal position sensor
Class 2 serial data
Computer data lines system
Cruise control switch
Cruise indicator
Engine control module (ecm) (front of engine on right valve cover)
Fuse 2a
Fuse block underhood (right front side of engine compartment)
Hot in run or start
Ignition
Inflatable restraint steering wheel module coil fuse holder (base of steering column)
Instrument panel cluster (ipc)
Instrument panel module (right side of dash behind glove box)
Logic
Low reference
Nca
Off
Pnk
R/a
Release sig
S147 (in engine harness, approximately 387 cm from c102)
S225
Tac motor control-1
Tac motor control-2
Tcc/cruise control
Tcc/cruise control release sig
Tcm/ ipc fuse 15a
Throttle actuator control (tac) module (part of throttle body assembly)
Throttle actuator control (tac) motor
Throttle position (tp) sensor
Tp sensor 1 signal
Tp sensor 2 signal
Transmission control module (tcm) (right front corner of engine comp under fuse block)
Turn signal/ multifunction switch

4.6L VIN A

4.6L VIN A, Cruise Control Wiring Diagram for Cadillac STS 2005

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List of elements for 4.6L VIN A, Cruise Control Wiring Diagram for Cadillac STS 2005:

(in steering column)
(on brake pedal support)
5 volt reference
Accy supp voltage
Brake pedal pos sensor signal
Brake pedal position sensor
Class 2 serial data
Computer data lines system
Cruise control switch
Cruise indicator
Engine control module (ecm) (on left front frame rail below headlamp)
Fuse 2a
Fuse block underhood (right front side of engine compartment)
Hot in run or start
Ignition
Inflatable restraint steering wheel module coil fuse holder (base of steering column)
Instrument panel cluster (ipc)
Instrument panel module (right side of dash behind glove box)
Logic
Low reference
Nca
Off
Pnk
R/a
Release sig
S147 (in engine harness, approximately 24 cm from c102)
S225
Tac motor control-1
Tac motor control-2
Tan
Tcc/cruise control
Tcc/cruise control release sig
Tcm/ ipc fuse 15a
Throttle actuator control (tac) module (part of throttle body assembly)
Throttle actuator control (tac) motor
Throttle position (tp) sensor
Tp sensor 1 signal
Tp sensor 2 signal
Transmission control module (tcm) (right front corner of engine comp under fuse block)
Turn signal/ multifunction switch

4.6L VIN A, Intelligent Cruise Control Wiring Diagram for Cadillac STS 2005

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List of elements for 4.6L VIN A, Intelligent Cruise Control Wiring Diagram for Cadillac STS 2005:

(right front frame rail) g104
(right side of dash behind glove box)
A11
Ccp fuse 10a
Computer data lines system
Distance sensing cruise control module (behind front fascia, near hood latch)
Electronic brake control module(ebcm) (right front corner of engine compart)
Electronic suspension control (ecu) (below right "c" pillar)
Gmlan serial wake up
Gmlan serial data bus +
Gmlan serial data bus -
Gmlan serial wake up
Ground
Hot in on or start
Ignition 1 voltage
Instrument panel module (ipm)
S116
Sp201 (under dashboard, near firewall grommet)
Tan
To headlight system
To power distribution system
Underhood fuse block (right side of engine compartment)
W/headlight leveling

DEFOGGERS

Defoggers Wiring Diagram for Cadillac STS 2005

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List of elements for Defoggers Wiring Diagram for Cadillac STS 2005:

(on left "c" pillar) g404
A12
Class 2 serial data
Computer data lines system
Driver door module (in driver door)
Driver outside rearview mirror
Feed
Front passenger door module (inside right front door)
Heated mirror element
Hot at all times
Hot in run
Hvac control module (behind center of dash, below radio)
Logic
Low reference
Nca
Passenger outside rearview mirror
R10
Rear defog fuse 40a
Rear defog relay
Rear defogger indicator
Rear defogger switch
Rear integration module (under package shelf trim panel)
Rear window defogger grid
Relay control
Right rear fuse block (below right rear seat)
Rtn

ELECTRONIC POWER STEERING

Electronic Power Steering Wiring Diagram for Cadillac STS 2005

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List of elements for Electronic Power Steering Wiring Diagram for Cadillac STS 2005:

(3.6l: in engine harn, 30 cm from ebcm conn) (4.6l: in engine harn, 25 cm from brake pressure sensor conn)
(left side of power steering gear) variable effort steering actuator
5-volt reference
5v ref
5v reference
Abs fuse 15a
B10
B11
B12
B13
B14
Battery
Brake fluid pressure sensor (on rear of ebcm)
Brake fluid pressure sensor sig
C10
Computer data lines system
Ebcm fuse 50a
Electronic brake control module (ebcm) (on right front corner of engine compt)
G104 (on right front frame rail)
G110 (on right front frame rail)
Ground
Hi spd gmlan ser data +
Hi spd gmlan ser data -
High effort ctrl
Hot at all times
Hot in run or start
Ign 1 relay
Ign 3
Lateral accelerometer sig
Lateral accelerometer signal
Long accelerometer sig
Long accelerometer signal
Low effort ctrl
Low ref
Low reference
Pnk
R43
R44
R45
R46
S100
S117 (in engine harn, 36 cm from ebcm conn)
S118
Steer wheel pos sig a
Steer wheel pos sig b
Steering angle sensor (on base of
Steering column)
Steering wheel position sig a
Steering wheel position sig b
Tan
Underhood fuse block (right front side of engine compt)
Yaw rate & lateral acceleration sensor (under front passenger seat)
Yaw rate sens signal
Yaw rate sensor signal

ELECTRONIC SUSPENSION

Electronic Suspension Wiring Diagram for Cadillac STS 2005

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List of elements for Electronic Suspension Wiring Diagram for Cadillac STS 2005:

(on right rear frame, by right rear wheel well)
(under rear of vehicle behind right rear tire) automatic level control (alc) compressor
10a
Alc relay fuse 30a
Alc solenoid fuse
Automatic level
Automatic level control (alc) compressor relay
Batt
Battery voltage
Computer data lines system
Electronic suspension control module (below right"c"pillar)
Electronic suspension control(esc) module fuse 25a
Fuse block left rear (under left side of rear seat)
Fuse block under hood (right front side of engine compartment)
G401
Gmlan ser data
Ground
Hot at all times
Instrument panel cluster (ipc)
Ipc class 2
Left front suspension damper
Left front suspension position sensor (top of right front suspension)
Left rear suspension damper
Left rear suspension position sensor (at top of left rear suspension)
Level relay
Lf damper ctrl
Lf damper out
Lf position sens
Logic
Lr damper ctrl
Lr damper out
Lr position sens
Message center
Message request
Nca a
Nca b
Pnk
Rf damper ctrl
Rf damper out
Rf position sens
Right front suspension damper
Right front suspension position sensor (at right front upper control arm)
Right rear suspension damper
Right rear suspension position sensor (at top of right rear suspension)
Rr damper ctrl
Rr damper out
Rr position sens
Sensor return
Service ride control
Tan
Tcm/ipc/ecm fuse 15a
Voltage reference

ENGINE PERFORMANCE

3.6L VIN 7

3.6L VIN 7, Engine Performance Wiring Diagram (1 of 4) for Cadillac STS 2005

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List of elements for 3.6L VIN 7, Engine Performance Wiring Diagram (1 of 4) for Cadillac STS 2005:

(17 cm from ecm)
(52 cm from ho2s bank 1 sensor 2)
(bottom of engine oil pan) engine oil level/temperature sensor
(left side of engine) engine oil pressure sensor
(rear of intake manifold) intake manifold runner control solenoid
+5v
+5v ref
Baro sig
Charging circuit
Ckp hi
Ckp sens lo
Cmp exhaust 1
Cmp exhaust 2
Cmp intake 1
Cmp intake 2
Crankshaft position sensor (left side of engine)
Ect sig
Engine control module (ecm) (front of engine, on right valve cover)
Evap purge
Fuel injectors
G103 (top right side of engine)
G113 (right front cylinder head)
Gen fdc sig
Gen to sig
Heated oxygen sensor bank 1 sensor 1 (on right exhaust pipe)
Heated oxygen sensor bank 1 sensor 2 (downstream of right catalytic converter)
Heated oxygen sensor bank 2 sensor 1 (on left exhaust pipe)
Heated oxygen sensor bank 2 sensor 2 (downstream of left catalytic converter)
Ho2s 1,1
Ho2s 2,1
Ho2s pmp 1,1
Ho2s pmp 2,1
Ic 1 sig
Ic 2 ctrl
Ic 3 ctrl
Ic 4 sig
Ic 5 ctrl
Ic 6 ctrl
Imrc sig
Imrc sol ctrl
Inj 1 ctrl
Inj 2 ctrl
Inj 3 ctrl
Inj 4 ctrl
Inj 5 ctrl
Inj 6 ctrl
Knock sensor (bank 1) (right side of engine)
Knock sensor (bank 2) (left side of engine)
Ks 1 sig
Ks 2 sig
Ks low ref
Low ref
Nca
Oil lev sig
Oil pres sig
Oil tmp sig
Red
S104
S121
S136
S137
Shield
Tac mtr ctrl
Tan
Tan a
Tp2 sig
Tps +5v ref
Tps low ref
Tps sig 1

3.6L VIN 7, Engine Performance Wiring Diagram (2 of 4) for Cadillac STS 2005

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List of elements for 3.6L VIN 7, Engine Performance Wiring Diagram (2 of 4) for Cadillac STS 2005:

(18 cm from ign coil 1)
(25 cm from ign coil 2)
(27 cn from evap canister purge solenoid valve)
(right rear side of engine block)
Canister vent fuse 10a
Ecm/ tcm/ ipc fuse 15a
Ecm/tcm fuse 10a
Even coils fuse 15a
Fuel pump motor relay
Fuel pump mtr fuse 15a
G104 (right front of engine compt)
G109 (right front of engine block)
G112
G401 (to rear of right rear shock tower)
Hfv6 ecm fuse 15a
Hot at all times
Hot in run or start
Ign 1 relay
Ignition coil 1 (rear of right cyl head)
Ignition coil 2 (front of left cyl head)
Ignition coil 3 (center of right cyl head)
Ignition coil 4 (center of left cyl head)
Ignition coil 5 (front of right cyl head)
Ignition coil 6 (rear of left cyl head)
Maf fuse 15a
Main relay
Nca
Odd coils fuse 15a
Pnk
Post o2 fuse 10a
Pre o2/ cam fuse 15a
R12
R13
R15
R40
R43
R44
R45
R46
R47
R48
R49
R50
Right rear fuse block (under right side of rear seat)
S101
S112
S119
S125
S126
S128
S129
Spark plug
Splice pack
Tan
Underhood fuse block (right front side of engine compt)

3.6L VIN 7, Engine Performance Wiring Diagram (3 of 4) for Cadillac STS 2005

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List of elements for 3.6L VIN 7, Engine Performance Wiring Diagram (3 of 4) for Cadillac STS 2005:

(21 cm from throttle body) s120
(32 cm from throttle body) s124
(front of left cyl head) camshaft position actuator solenoid (exhaust bank 2)
(front of left cyl head) camshaft position actuator solenoid (intake bank 2)
(front of left cyl head) camshaft position sensor (exhaust bank 2)
(front of left cyl head) camshaft position sensor (intake bank 2)
(front of right cyl head) camshaft position actuator solenoid (exhaust bank 1)
(front of right cyl head) camshaft position actuator solenoid (intake bank 1)
(front of right cyl head) camshaft position sensor (exhaust bank 1)
(front of right cyl head) camshaft position sensor (intake bank 1)
+5v
A/c refrigerant pressure sensor (near left front strut tower)
Barometric pressure sensor (left rear corner of upper intake manifold)
Engine coolant temperature sensor (center of left cyl head)
Evap canister purge solenoid valve (right side of engine)
Low ref
Mass air flow (maf) & intake air temperature (iat) sensor (in air intake duct)
Pnk
Signal
Tan
Throttle position sensor (on throttle body)

3.6L VIN 7, Engine Performance Wiring Diagram (4 of 4) for Cadillac STS 2005

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List of elements for 3.6L VIN 7, Engine Performance Wiring Diagram (4 of 4) for Cadillac STS 2005:

(19 cm from ho2s bank 1 sensor 1)
(28 cm from fuel tank press sensor)
(28 cm from maf sensor)
(36 cm from brake press sensor)
(front center of right cyl head)
(in fuel tank meter assembly) fuel tank pressure sensor
(left side of rear compartment) rear object sensor control module
+5v ref
+5v ref a
+5v ref c
A/c ref pres
A/c system
Accelerator pedal
App sens 2 sig
App sens sig 1
Battery +
Clu rly ctrl
Cooling fans system
Data wake-up
Engine control module (ecm) (front of engine, on right valve cover)
Evap canister vent solenoid valve (above rear differential)
Evap vent sol
Exterior lights system
Fan rly ctrl
Fuel lev sens
Fuel lev sig
Fuel level sensor
Fuel pump & sensor assembly
G113
G401 (rear of right rear shock tower)
Gmlan bus
Ho2s 1,2
Ho2s 2,2
Iat sig
Ign 1 volt
Inside rearview mirror
Instrument panel cluster (ipc)
Instrument panel module (ipm)
Lan bus +
Lan bus -
Logic
Low ref
Maf sig
Main rly ctrl
Malfunction indicator lamp
Mil ctrl
P/n sig
Pnk
Position sensor (top of accel pedal)
Radio
Rly coil ctrl
Rly coil supp
Rly ctrl
S106
S107
S108
S109
S113
S406
Secondary fuel level sensor
Ser data bus
Starting circuit
Tan
Tank pres sig
Transmission control module (right front of engine compt)
Transmission manual shift shaft switch assembly (in transmission)
Vss sig
Wake-up

4.6L VIN A

4.6L VIN A, Engine Performance Wiring Diagram (1 of 5) for Cadillac STS 2005

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List of elements for 4.6L VIN A, Engine Performance Wiring Diagram (1 of 5) for Cadillac STS 2005:

(19 cm from ho2s bank 1 sensor 1) s113
(39 cm from brake press sensor)
(left side of rear compt) rear object sensor control module
12v ref
A/c comp cltch rly
A/c press low ref
A/c press sens sig
A/c refrigerant pressure sensor (near left front strut tower)
A/c system
Accelerator pedal position (app) sensor (attached to top of accelerator pedal)
App 5v ref
App low ref
Apps 1 sig
Apps 2 sig
Battery + vlt
Computer data lines system
Cooling fans system
Data wake-up
Ecm/ tcm fuse 10a
Engine control module (ecm) (below left headlamp)
Evap vent sol ctnl
Evaporative emissions (evap) canister vent solenoid (above rear differential)
Exterior lights system
Fan rly ctrl
Fuel pmp rly cntl
G104 (right front of engine compt)
Hi spd ser data +
Hi spd ser data -
Hot at all times
Hot in run or start
Iat sen sig
Iat sig
Ign
Ign 1 vlt
Inside rearview mirror
Instrument panel cluster (ipc)
Instrument panel module (ipm)
Lo spd cool fan rly
Logic
Low ref
Maf 12v ref
Maf low ref
Maf sen sig
Main relay
Main rly ctrl
Mass air flow (maf) sensor (in air intake duct)
Mil cntl
Mil ind
Pnk
Radio
S105
Sens sig
Starting system
Stoplamp sw sig
Strtr enable rly cntl
Tan
Tcm/ ipc/ ecm fuse 15a
To even coils fuse (diagram 4 of 5)
Transmission control module (tcm)
Underhood fuse block (right front of engine compt)
V8 ecm fuse 10a
Vehicle speed sig

4.6L VIN A, Engine Performance Wiring Diagram (2 of 5) for Cadillac STS 2005

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List of elements for 4.6L VIN A, Engine Performance Wiring Diagram (2 of 5) for Cadillac STS 2005:

(34 cm from c102) s104
(on left exhaust pipe, before catalytic converter) heated oxygen sensor (ho2s) bank 2 sensor 1
(on right exhaust pipe, before catalytic converter) heated oxygen sensor (ho2s) bank 1 sensor 1
Engine coolant temperature (ect) sensor (rear of right cylinder head
Engine oil pressure (eop) sensor (left side of engine)
Evaporative emission (evap) canister purge valve (rear of engine)
From b underhood fuse block (diagram 4 of 5)
Heated oxygen sensor (ho2s) bank 1 sensor 2 (downstream of right catalytic converter)
Heated oxygen sensor (ho2s) bank 2 sensor 2 (downstream of left catalytic converter)
Manifold absolute pressure (map) sensor (front center of engine)
Nca
Post o2 fuse 15a
Pre o2/ cam fuse 15a
S101 (15 cm from fuel inj 5)
Tan
Underhood fuse block (right front of engine compt)

4.6L VIN A, Engine Performance Wiring Diagram (3 of 5) for Cadillac STS 2005

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List of elements for 4.6L VIN A, Engine Performance Wiring Diagram (3 of 5) for Cadillac STS 2005:

(in bottom of oil pan) engine oil level switch
(in fuel tank meter assembly)
(top right of fuel tank) fuel pump & sender assembly
C3 engine control module (below left headlamp)
Canister vent fuse 10a
Ctrl actuator sig
Eop 5v ref
Eoplow ref
Ftp 5v ref
Ftp low ref
Ftp sens sig
Fuel lev sen sig
Fuel level sensor
Fuel pump
Fuel pump motor relay
Fuel pump mtr fuse 15a
Fuel tank pressure (ftp) sensor
G100 (rear of right cyl head)
G401 (to rear of right rear shock tower)
Ho2s hi 1,2
Ho2s hi 2,2
Ho2s high 1,1
Ho2s high 2,1
Ho2s htr 1,1
Ho2s htr 1,2
Ho2s htr 2,1
Ho2s htr 2,2
Ho2s input pmp 1,1
Ho2s input pmp 2,1
Ho2s lo 1,1
Ho2s lo 1,2
Ho2s lo 2,1
Ho2s lo 2,2
Ho2s output pmp 1,1
Ho2s output pmp 2,1
Hot at all times
Oil lev sw sig
Oil pressure sen sig
R12
R13
R15
R40
Right rear fuse block (under right side of rear seat)
S406 (28 cm from fuel tank press sensor)
Secondary fuel sender assembly
Splice pack
Tan
Transmissions system

4.6L VIN A, Engine Performance Wiring Diagram (4 of 5) for Cadillac STS 2005

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List of elements for 4.6L VIN A, Engine Performance Wiring Diagram (4 of 5) for Cadillac STS 2005:

(14 cm from fuel inj 7) s102
(16 cm from fuel inj 8) s103
(31 cm from ign coil module 8) s135
(36 cm from ign coil module 2)
(3o cm from ign coil module 1)
(rear side of right cyl head) g107
D d
Even coils fuse 15a
From main a relay (diagram 1 of 5)
Fuel injector
Ignition coil/ module
Odd coils fuse 15a
Pnk
Pnk a
Red
Red b
S131
S133
S142
S144
S146
Tan
To post o2 fuse (diagram 2 of 5)
Underhood fuse block (right front of engine compt)

4.6L VIN A, Engine Performance Wiring Diagram (5 of 5) for Cadillac STS 2005

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List of elements for 4.6L VIN A, Engine Performance Wiring Diagram (5 of 5) for Cadillac STS 2005:

(front of left cyl head) camshaft position sensor exhaust bank 2 low ref
(front of left cyl head) camshaft position sensor intake bank 2
(front of left cylinder head)
(front of right cyl head) camshaft position sensor exhaust bank 1 low ref
(front of right cyl head) camshaft position sensor intake bank 1 low ref
(on throttle body) throttle position sensor
(under intake manifold) crankshaft position sensor low ref
12v
Camshaft position actuator solenoid exhaust bank 1 (front of right cyl head)
Camshaft position actuator solenoid exhaust bank 2 (front of left cyl head)
Camshaft position actuator solenoid intake bank 1 (front of right cyl head)
Camshaft position actuator solenoid intake bank 2 (front of left cyl head)
Charging circuit
Ckp 12v ref
Ckp low ref
Ckp sen 1 sig
Cmp act sol b1 exhst
Cmp act sol b1 intk
Cmp act sol b2 exhst
Cmp act sol b2 intk
Cmp b1 ex low ref
Cmp b1 in 12v ref
Cmp b1 in low ref
Cmp b2 ex 12v ref
Cmp b2 ex low ref
Cmp b2 in 12v ref
Cmp b2 in low ref
Cmp bi ex 12v ref
Cmp sen sig b1 exhst
Cmp sen sig b1 intk
Cmp sen sig b2 exhst
Cmp sen sig b2 intk
Ect low ref
Ect sen sig
Engine control module (ecm) (below left headlamp)
Evap can prg sol cntl
Fuel inj 1 cntl
Fuel inj 2 cntl
Fuel inj 3 cntl
Fuel inj 4 cntl
Fuel inj 5 cntl
Fuel inj 6 cntl
Fuel inj 7 cntl
Fuel inj 8 cntl
G100
G100 (rear side of right cyl head)
Gen field duty cyc sig
Gen turn on sig
Ground
Ic 1 cntl
Ic 2 cntl
Ic 3 cntl
Ic 4 cntl
Ic 5 cntl
Ic 6 cntl
Ic 7 cntl
Ic 8 cntl
Knock sen 1 sig
Knock sen 2 sig
Knock sensor (ks) 1 (under intake manifold)
Knock sensor (ks) 2 (under intake manifold)
Ks1 low ref
Ks2 low ref
Low ref
Map 5v ref
Map low ref
Map sen sig
S112
Sen sig
Tac mtr cntl 1
Tac mtr cntl 2
Tan
Tps 1 sig
Tps 2 sig
Tps 5v ref
Tps low ref

EXTERIOR LIGHTS

Backup Lamps Wiring Diagram for Cadillac STS 2005

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List of elements for Backup Lamps Wiring Diagram for Cadillac STS 2005:

3.6l
4.6l
Automatic transmission
Computer data lines system
G100 (rear side of right cyl head)
G113 (front center of right cyl head)
G402 (in rear compt, to rear of left rear shock tower)
Hi spd ser data +
Hi spd ser data -
Hot at all times
Left back-up lamp
Left rear fuse block (under left side of rear seat)
Lo spd gmlan ser data
R36
R37
R38
R40
Rear integration module (in left side of rear compt, under rear shelf)
Reverse lamp fuse 10a
Reverse lamp relay
Reverse rly ctrl
Right back-up lamp
S106
S24
S25
S28
S401
Splice pack
Tan
Transmission control module (tcm) (a/t) (right front corner of engine compt)
Transmission manual shift shaft switch assembly
Trs a
Trs b
Trs c

Exterior Lamps Wiring Diagram (1 of 2) for Cadillac STS 2005

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List of elements for Exterior Lamps Wiring Diagram (1 of 2) for Cadillac STS 2005:

(behind left kick panel) g200
(near left front strut tower, at bottom of inside fender well)
(not used)
(rear of left rear shock tower)
Auto
Back light lamp
Battery
Computer data lines system
G101
G104 (on right body rail, near right headlamp)
G201 (behind right kick panel)
G402
G402 (rear of left rear shock tower)
Ground
Hazard sw sign
Hazard switch
Head
Headlamps on sig
Hot at all times
Instrument panel cluster (ipc)
Instrument panel module (right side of dash, behind glove box)
Interior lights system
Ipm/ aldl fuse 10a
Left front turn signal lamp
Left front turn signal/ fog lamp assembly
Left license lamp
Left repeater lamp
Left turn signal fuse 10a
Left turn signal ind
Left turn signal voltage
Left turn sw sig
Lic/ipm fuse 7.5a
Lo speed gmlan serial data
Logic
Low speed gmlan
Low speed gmlan serial data
Off
Park
Park lamp relay
Park lamp rly ctrl
Park lamp sw on sig
R31
R32
R33
R34
Rear integration module (in left side of rear compt, under rear shelf)
Right front turn signal lamp
Right front turn signal/ fog lamp assembly
Right license lamp
Right rear fuse block (under right side of rear seat)
Right repeater lamp
Right turn signal ind
Right turn signal voltage
Right turn sw sig
Rim fuse 10a
S226
S311
S401
Signal
Splice pack sp201 (under dashboard, near firewall grommet)
Stop lamp sw sign
Tilt/ lk lmp/ clm relay coils fuse 10a
To underhood fuse block (lt park fuse, 10a) (diagram 2 of 2)
Turn signal/ multifunction switch
Underhood fuse block (right front side of eng compt)
Volt check fuse 10a

Exterior Lamps Wiring Diagram (2 of 2) for Cadillac STS 2005

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List of elements for Exterior Lamps Wiring Diagram (2 of 2) for Cadillac STS 2005:

(in body harn, 58 cm from right rear fuse block c1) s306
(in body harn, 72 cm from right rear fuse block c1) s317
(right front of engine compt) underhood fuse block
(under right side of rear seat) right rear fuse block
(w/ hid)
(w/o hid)
Center high mounted stop lamp (chmsl)
Engine controls & transmissions systems
From underhood fuse block (lic/ipm fuse, 7.5a) (diagram 1 of 2)
G104 (on right body rail, near right headlamp)
G401 (in rear compt, to rear of right rear shock tower)
G401 (rear of right rear shock tower)
G402 (in rear compt, to rear of left rear shock tower)
Ground
Hot at all times
Left front cornering/ side marker lamp
Left front park lamp
Left headlamp assembly
Left rear cornering/ side marker lamp
Left tail lamp assembly
Left tail lamp outage detection signal
Logic
Lt park fuse 10a
R36
R37
R38
R40
Right front cornering/ side marker lamp
Right front park lamp
Right headlamp assembly
Right rear cornering/ side marker lamp
Right tail lamp assembly
Right tail lamp outage detection signal
Rt park fuse 10a
S12
S13
S14
S400
S401
Side marker
Splice pack
Stop lamp fuse 10a
Stop lamp relay
Stop/ turn
Tail

GROUND DISTRIBUTION

Ground Distribution Wiring Diagram (1 of 5) for Cadillac STS 2005

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List of elements for Ground Distribution Wiring Diagram (1 of 5) for Cadillac STS 2005:

(at back of underhood fuse block) g105
(on left side "c" pillar, near rear window) g404
(on rear side of right cylinder head) g106
(on right front frame rail, near right front strut tower) g110
(on right side "c" pillar, near rear window) g403
(under center console) g306
A/c compressor clutch
A/t
After boil heater pump
Automatic headlamp dimming relay
Automatic transmission
Battery
Brake fluid level switch
C110
Camshaft position (cmp) actuator solenoid exhaust bank 1
Camshaft position (cmp) actuator solenoid exhaust bank 2
Camshaft position (cmp) actuator solenoid intake bank 1
Camshaft position (cmp) actuator solenoid intake bank 2
Coolant level switch
Electronic brake control module (ebcm)
Engine control module (ecm)
Engine oil level switch
G100 (on rear side of right cylinder head)
G101 (near left front strut tower, at bottom of inside fender well)
If equipped
Inflatable restraint sensing & diagnostic module (sdm)
Instrument panel module (ipm)
Left heated washer nozzle
Rear window defogger
Rear window keyless entry antenna
Right heated washer nozzle
S112 (under intake manifold, in valley jumper harness, near cmp actuator solenoids)
Transmission control module (tcm)
W/ hid head- lamps
Windshield headlamp washer motor assembly
Windshield wiper/ washer module

Ground Distribution Wiring Diagram (2 of 5) for Cadillac STS 2005

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List of elements for Ground Distribution Wiring Diagram (2 of 5) for Cadillac STS 2005:

(right front side of engine compartment) underhood fuse block
(w/ hid)
(w/ hid) left headlamp
(w/ hid) right headlamp
A/t shift lever assembly
Accessory relay
Air quality sensor
B11
Blower controller
C122
C123
C311
Console auxiliary power outlet
Distance sensing cruise control module
Front auxiliary power outlet
Front passenger door module
Front passenger window motor
Front passenger window switch
G104 (on right front frame rail, near bumper bracket)
G201 (behind right kick panel)
Hazard switch
Headlamp leveling module
Hood ajar switch
Horn assembly
Hvac control module
I/p compartment lamp switch
Ign 1 relay
Ignition mode switch
Instrument panel module (ipm)
Left front cornering/ side marker lamp
Left front turn signal/ fog lamp assembly
Left headlamp
Left repeater lamp
Nca
Passenger door latch assembly
Passenger door lock switch
Rear auxiliary hvac control module
Rear auxiliary power outlet
Right cooling fan
Right front cornering/ side marker lamp
Right front door handle switch
Right front turn signal/ fog lamp assembly
Right headlamp
Right rear door latch assembly
Right rear door module (rrdm)
Right rear window motor
Right rear window switch
Right repeater lamp
S/p fan relay
S210 (in dash harn, 35 cm from c214)
S600 (in passenger door harn, 32 cm from front passenger window motor connector
S601 (in passenger door trim harn, 42 cm from passenger door lock switch connector)
S800 (in right rear door harn, 32 cm from c801)
Traction control switch
W/ automatic adaptive cruise control
W/o hid

Ground Distribution Wiring Diagram (3 of 5) for Cadillac STS 2005

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List of elements for Ground Distribution Wiring Diagram (3 of 5) for Cadillac STS 2005:

(w/ hud)
(w/o hud) i/p dimmer switch
C276
C277
Data link connector (dlc)
Driver back heated seat element
Driver cushion cooled seat blower motor
Driver cushion heated seat element
Driver door latch assembly
Driver door lock switch
Driver door module (ddm)
Driver door switch assembly (ddsa)
Driver seat adjuster switch
Driver window motor
G200 (behind left kick panel)
G307 (to left of driver seat, on left frame rail)
Head up display (hud)
Heated steering wheel
Heated steering wheel control module
Inflatable restraint steering wheel module coil
Instrument panel cluster (ipc)
Interior rear compartment lid release switch
Left front door handle switch assembly
Left front seat belt switch
Left rear door latch assembly
Left rear door module (lrdm)
Left rear window motor
Left rear window switch
Left steering wheel controls
Memory seat module (msm)
Nca
Passenger back cooled seat blower motor
Passenger back heated seat element
Passenger climate control seat module
Passenger cushion cooled seat blower motor
Passenger cushion heated seat element
Passenger lumbar adjuster switch
Passenger seat adjuster switch
Right front seat belt switch
Right steering wheel controls
S224 (in steering column harn)
S226 (in steering column harn)
S228 (in steering column harn)
S500 (in driver door harn, 32 cm from driver window motor conn)
S501 (in driver door trim harn, 47 cm from driver door lock switch conn)
S700 (in left rear door harn, 32 cm from c701)
Splice pack sp201 (on dash harn, under dashboard, near firewall grommet)
Turn signal/ multifunction switch
W/ front heater seat
W/ power lumbar seat
W/o front heater seat
W/o power lumbar seat

Ground Distribution Wiring Diagram (4 of 5) for Cadillac STS 2005

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List of elements for Ground Distribution Wiring Diagram (4 of 5) for Cadillac STS 2005:

(exterior) rear compartment lid release switch
(if equipped)
(if equipped) garage door opener
(if equipped) left front door subwoofer speaker
(if equipped) outside moisture sensor
(if equipped) right front door subwoofer speaker
(if equipped) sunroof switch
(if equipped) tire pressure monitor module
(under left side of rear seat) left rear fuse block
(under right side of rear seat) right rear fuse block
(w/ hid headlamps) inside rearview mirror (isrvm)
(w/ info- tainment system 014 & 015) tv antenna module
(w/ info- tainment system 015)
(w/o hid headlamps) inside rearview mirror (isrvm)
Audio amplifier
Automatic level control (alc) compressor
Center high mounted stop lamp (chmsl)
Coil
Digital radio receiver
Electronic suspension control module
Fuel pump & sender assembly
Fuel pump relay
G401 (rear of right rear shock tower)
G402 (rear of left rear shock tower)
Ign 1 relay
Ign 3 relay
Left backup lamp
Left license lamp
Left rear cornering/ side marker lamp
Left tail lamp assembly
Left vanity mirror lamp
Overhead courtesy/ front reading lamps
Overhead courtesy/ rear reading lamps
R11
R21
R25
R36
Radio
Rear compartment lid release actuator
Rear heated seat module
Rear integration module (rim)
Rear object sensor control module
Rear subwoofer speaker
Remote control door lock receiver (rcdlr)
Right backup lamp
Right license lamp
Right rear cornering/ side marker lamp
Right tail lamp assembly
Right vanity mirror lamp
S400 (in rear fascia harn, 37 cm from left rear corner object sensor conn)
S401 (in body harn, 15 cm from exterior rear compartment release switch conn)
Splice pack
Stop lamp relay
Sunroof control module
Theft deterrent alarm siren
Traffic information receiver (vics)
Vehicle communication interface module (vcim)

Ground Distribution Wiring Diagram (5 of 5) for Cadillac STS 2005

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List of elements for Ground Distribution Wiring Diagram (5 of 5) for Cadillac STS 2005:

4 conn)
A/c compressor clutch
Automatic transmission
C110
Engine control module (ecm)
G103 (3.6l) (top right side of engine, fastened to ecm case)
G107 (4.6l) (on rear side of right cylinder head)
G109 (3.6l) (near right front of engine block)
G112 (3.6l) (right rear side of engine block, near starter)
G113 (3.6l) (front center of right front cylinder head)
Ignition coil 1
Ignition coil 2
Ignition coil 3
Ignition coil 4
Ignition coil 5
Ignition coil 6
Ignition coil/ module 1
Ignition coil/ module 2
Ignition coil/ module 3
Ignition coil/ module 4
Ignition coil/ module 5
Ignition coil/ module 6
Ignition coil/ module 7
Ignition coil/ module 8
Intake manifold runner control (imrc) valve
S106 (in engine harn, 20 cm from tcm connector)
S125 (in engine poa harn, 12 cm from g109)
S126 (in engine poa harn, 18 cm from g109)
S128
S129 (in engine poa harn, 17 cm from g112)
S133 (in ignition coil harn, 30 cm from ignition coil module 2 connector)
S144 (in ignition coil harn, approximately 39 cm from ignition coil module 1 connector)
S148 (in engine poa harn, 39 cm from g113)
Transmission control module (tcm)

HEADLIGHTS

Headlights Wiring Diagram, with High Intensity Discharge for Cadillac STS 2005

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List of elements for Headlights Wiring Diagram, with High Intensity Discharge for Cadillac STS 2005:

(behind left kick panel)
(info not avail
(right front frame rail)
A11
Air conditioning system
Auto
Automatic headlamp dimming relay (underhood fuse block)
Automatic high beam pwm sig
B12
C (not used)
C120
C121
Class 2 (ipm)
Computer data lines system
Exterior lights system
Flash to pass sw sig
Fog lamp
Fog lamp fuse 15a
Fog lamp relay
Fog lamps ind
Fog lmp rly ctrl
Fog lmp sw sig
Front fog lamp switch
Ftp
G101 (near left front strut tower)
G104
G104 (right front frame rail)
G200
G200 (behind left kick panel)
Gmlan (ipm)
Head
Headlmp on sig
Hi beam sw sig
High
High beam
High beam ind
Hot at all times
Hot in run or start
Hvac control module (at center of dash)
Inside rear view mirror
Instrument panel cluster
Instrument panel module (ipm) (behind glove box)
Left front turn signal/ fog lamp assembly
Left head- lamp ballast
Left headlamp assembly
Lights on ind
Lo beam relay
Low
Low beam
Low beam rly ctrl
Low ref
Low spd gmlan ser data
Lt low beam fuse 20a
Off
Park
R23
R24
R25
R26
Rear prk lmp sply voltage
Right front turn signal/ fog lamp assembly
Right head- lamp ballast
Right headlamp assembly
Rt lo beam fuse 20a
S202 (51 cm from left front dash speaker conn)
S226
Sen sig
Ser data
Ser data gmlan
Smart beam fuse 15a
Spare relay
Splice pack sp201 (under dash, near firewall grommet)
Sunload sensor assembly (center of dash, in defroster grille)
Tilt/lk lmp/clm coils fuse 10a
Turn signal/ multifunction switch
Twilight sentinel display
Underhood fuse block (right front side of eng compt)

Headlights Wiring Diagram, without High Intensity Discharge for Cadillac STS 2005

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List of elements for Headlights Wiring Diagram, without High Intensity Discharge for Cadillac STS 2005:

(behind left kick panel)
(info not avail
(right front frame rail)
A11
Air conditioning system
Auto
B12
C (not used)
C120
C121
Class 2 (ipm)
Computer data lines system
Exterior lights system
Flash to pass sw sig
Fog lamp
Fog lamp fuse 15a
Fog lamp relay
Fog lamps ind
Fog lmp rly ctrl
Fog lmp sw sig
Front fog lamp switch
Ftp
G104
G104 (right front frame rail)
G200
G200 (behind left kick panel)
Gmlan (ipm)
Head
Headlmp on sig
Hi beam relay
Hi beam rly ctrl
Hi beam sw sig
High
High beam
High beam ind
Hot at all times
Hot in run or start
Hvac control module (at center of dash)
Instrument panel cluster
Instrument panel module (ipm) (behind glove box)
Left front turn signal/ fog lamp assembly
Left headlamp assembly
Lights on ind
Lo beam relay
Low
Low beam
Low beam rly ctrl
Low ref
Low spd gmlan ser data
Lt hi beam fuse 10a
Lt low beam fuse 20a
Off
Park
R23
R24
R25
R26
R27
R28
R29
R30
Rear prk lmp sply voltage
Right front turn signal/ fog lamp assembly
Right headlamp assembly
Rt hi beam fuse 10a
Rt low beam fuse 20a
S202 (51 cm from left front dash speaker conn)
S226
Sen sig
Ser data
Ser data gmlan
Spare relay
Splice pack sp201 (under dash, near firewall grommet)
Sunload sensor assembly (center of dash, in defroster grille)
Tilt/lk lmp/clm coils fuse 10a
Turn signal/ multifunction switch
Twilight sentinel display
Underhood fuse block (right front side of eng compt)

HORN

Horn Wiring Diagram for Cadillac STS 2005

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List of elements for Horn Wiring Diagram for Cadillac STS 2005:

A nca
C276
C277
Fuse 2a
G104 (on right body rail, near right headlamp)
High note horn
Horn assembly
Horn fuse 15a
Horn relay
Horn relay control
Horn switch
Hot at all times
Inflatable restraint steering wheel module coil
Inflatable restraint steering wheel module coil fuse holder (near base of steering wheel)
Instrument panel module (ipm) (right side of glove box dash, behind)
Low note horn
Nca
R10
R11
R12
R13
Steering wheel control pad
Tan
Underhood fuse block (right front of engine compartment)

INSTRUMENT CLUSTER

Instrument Cluster Wiring Diagram (1 of 2) for Cadillac STS 2005

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List of elements for Instrument Cluster Wiring Diagram (1 of 2) for Cadillac STS 2005:

(not used)
Abs indicator
Backlighting
Backlighting ctrl
Bat + voltage
Brake fluid level switch (master cylinder reservoir)
Brake indicator
Charge indicator
Class 2 (ecm)
Class 2 (ipm)
Clock
Clock ctrl
Cruise indicator
Dic sw
Dic sw low ref
Dic sw sig
Ecm/tcm fuse 10a
Engine controls system
Engine coolant temperature indicator
Fasten safety belt indicator
Front fog lamps indicator
Fuel level
G101 (near left front strut tower)
Gmlan
Gmlan (ebcm)
Gmlan (ecm)
Gmlan (ipm)
Gmlan (rim)
Gmlan (sdm)
Gmlan (tcm)
High beam indicator
Hot at all times
Hot in run or start
Hud fuse 10a
Ign 1 voltage
Instrument panel cluster (ipc)
Left turn indicator
Lights on indicator
Low engine oil pressure indicator
Low spd gmlan serial
Malfunction indicator
Pnk
Power distribution system
Right turn indicator
Security indicator
Sir indicator
Speedometer
Sport mode indicator
Tachometer
Tap up/ down enable indicator
Tcm/ipc/ ecm fuse 15a
Temperature
Tpm indicator
Traction control off indicator
Trip reset sw sig
Trip reset switch
Trip/ odometer
Trip/odometer ctrl
Underhood fuse block (right front side of eng compt)
Wait to start indicator (not used)
Winter mode indicator

Instrument Cluster Wiring Diagram (2 of 2) for Cadillac STS 2005

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List of elements for Instrument Cluster Wiring Diagram (2 of 2) for Cadillac STS 2005:

Auto
Bat pos voltage
Computer data lines system
Courtesy lmp sw on sig
Eng/ met
G200 (behind left kick panel)
Head up display (hud)
Head up display sw low ref
I/p dimmer sw sig
I/p dimmer switch
Ign
Image dn
Image up
Info dn
Info reset
Info up
Instrument panel module (ipm) (behind glove box)
Interior lights system
Lo spd gmlan serial data
Logic
Low ref
Low spd gmlan serial data
Message request
Night vision image dimming sig
Night vision image dn sig
Night vision image up sig
Park brake switch (base of brake pedal)
Pk brk sw sig
Pnk
Sig gnd
Splice pack sp201 (under dash, near firewall grommet)
Tan
Trip a/b
Trip reset
W/ head up display
Xxx mph/kpm check gages

INTERIOR LIGHTS

Courtesy Lamps Wiring Diagram (1 of 2) for Cadillac STS 2005

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List of elements for Courtesy Lamps Wiring Diagram (1 of 2) for Cadillac STS 2005:

Computer data lines system
Ctsy lmp ctrl
Ctsy relay ctrl
Front overhead courtesy/ reading lamps
G201 (behind right kick panel)
G402 (rear of left rear shock tower)
Gmlan serial data
Hot at all times
I/p compart- ment lamp
I/p compart- ment lamp switch
Interior lamp fuse 10a
Interior lamp relay
Left footwell courtesy lamp
Left rear door courtesy lamp
Left vanity mirror lamp
R17
R18
R19
R20
Rear compart- ment courtesy lamp
Rear compart- ment lid release actuator
Rear integration module (rim) (left side of rear compt)
Rear overhead courtesy/ reading lamps
Right footwell courtesy lamp
Right rear door courtesy lamp
Right rear fuse block (under right side of rear seat)
Right vanity mirror lamp
S210
S215 (65 cm from c200)
S308 (82 cm from c308)
S309 (92 cm from c308)
S310
Splice pack sp300
Splice pack sp303 (right side of passenger seat)
Trunk diode

Courtesy Lamps Wiring Diagram (2 of 2) for Cadillac STS 2005

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List of elements for Courtesy Lamps Wiring Diagram (2 of 2) for Cadillac STS 2005:

Ajar
Auto on
Computer data lines system
Courtesy lamp high
Courtesy lamp low
Courtesy lamp sw on
Driver door module (ddm) (in door)
Front passenger door module (fpdm) (in door)
G200 (behind left kick panel)
G201 (behind right kick panel)
Gmlan serial data
I/p dimmer sw low
I/p dimmer switch
Instrument panel module (ipm) (behind right side of dash)
Left front door courtesy lamp
Left front door latch assembly
Left rear door module (lrdm) (in door)
Lf door ajar
Lr door ajar
Rf door ajar
Right front door courtesy lamp
Right front door latch assembly
Right rear door latch assembly
Right rear door module (rrdm) (in door)
Rr door ajar
S500
S600
S700
S800

Instrument Illumination Wiring Diagram (1 of 2) for Cadillac STS 2005

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List of elements for Instrument Illumination Wiring Diagram (1 of 2) for Cadillac STS 2005:

(71 cm from driver door lock switch) s504
Backlight lamp ctrl
Battery b+
Computer data lines system
Ctsy lamp on sig
Dimmer low ref
Dimmer sw sig
Driver door module (ddm) (in door)
Front passenger door module (fpdm) (in door)
Front strut tower)
G101 (near left
G201 (behind
Gmlan serial data
Ground
Hot at all times
I/p dimmer switch
Instrument panel module (ipm) (behind right side of dash)
Ipm/aldl fuse 10a
Left front door lock switch
Left front door switch assembly
Lic/ dimming fuse 15a
Park lamp ctrl
Park lamp relay
R31
R32
R33
R34
Rear compartment interior lid release switch
Right front door lock switch
Right front window switch
Right kick panel)
S210
S501
S601
Tilt/lk/ lmp/clm fuse 10a
Underhood fuse block (in engine compt, next to left strut tower)

Instrument Illumination Wiring Diagram (2 of 2) for Cadillac STS 2005

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List of elements for Instrument Illumination Wiring Diagram (2 of 2) for Cadillac STS 2005:

Automatic transmission shift lever assembly
Backlight lamp ctrl
C276 b
C276 f
C277 b
C277 b1
Computer data lines system
Front auxiliary power outlet
Fuse 2a
G200 (behind
G201 (behind
G402 (rear of left rear shock tower)
Gmlan serial data
Hazard switch
Hvac control module (center of dash, below radio)
I/p dimmer switch
Ignition mode switch
Inflatable restraint steering wheel module coil
Inflatable restraint steering wheel module coil fuse holder
Left kick panel)
Left rear door module (lrdm) (in door)
Left rear window switch
Left steering wheel controls
Rear auxiliary hvac control module
Right kick panel)
Right rear door module (rrdm) (in door)
Right rear window switch
Right steering wheel controls
S210
S224
S227 (in steering column harn)
S228 (in steering column harn)
S310
S311
S700
S800
Splice pack sp201 (under dash, near firewall grommet)
Splice pack sp300
Sunroof switch
Traction control switch

MEMORY SYSTEMS

Driver"s Mirror Wiring Diagram for Cadillac STS 2005

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List of elements for Driver"s Mirror Wiring Diagram for Cadillac STS 2005:

5v feed
5v ref
5v rtn
Bat pos voltage
Computer data lines system
Driver door module (ddm) (inside driver door)
Driver door switch assembly (ddsa)
Driver dr mod fuse 10a
Driver outside rearview mirror
Drvr horiz pos sens sig
Drvr vert pos sens sig
G200 (behind left kick panel)
Gnd
Ground
Horiz motor
Horiz pos sens
Horiz pos sensor
Hot at all times
Left
Left horiz
Left rear fuse block (under left side of rear seat)
Lft mir mtr dn ctrl
Lft mir mtr lft ctrl
Lft mir mtr up/rt ctrl
Logic
Low ref
Low spd gmlan serial data
Mirror switches
Right
Right horiz
S500
S501
S502 (w/ infotainment system 012, 014 & 015)
Sel left
Sel right
Vert down
Vert motor
Vert pos sens
Vert pos sensor
Vert up

Memory Power Tilt & Power Telescopic Wiring Diagram for Cadillac STS 2005

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List of elements for Memory Power Tilt & Power Telescopic Wiring Diagram for Cadillac STS 2005:

(16 cm from c300)
(21 cm from driver seat adjuster motor assembly c2) s363
(25 cm from c300)
(left of river seat, on left frame rail)
Bat pos voltage
C2 c
Computer data lines system
Driver lumbar motor assembly
Driver seat adjuster motor assembly
Driver seat recline motor assembly
Drv pwr seat frt vert mtr dn ctrl
Drv pwr seat rear vert mtr dn ctrl
G307
Gnd
Hot at all times
Hud fuse 10a
Instrument panel module (ipm) (behind glove box)
Left rear fuse block (under left side of rear seat)
Low spd gmlan serial data
Mem mirror pos sens 5v ref
Mem seat/mirror sens low ref
Memory seat module (under driver seat)
Out
Pnk
Power distribution system
Power seats circuit breaker 30a
S302
S352 (20 cm from driver seat adjuster motor assembly conn)
S356
S362
S369 (in steering column harness)
S370 (in steering column harness)
Steering column tele mtr fwd
Steering column tele mtr sig
Steering column tilt mtr sig
Steering column tilt mtr up ctrl
Strg col tilt/tele dn sw sig
Strg col tilt/tele fwd sw sig
Strg col tilt/tele rwd sw sig
Strg col tilt/tele up sw sig
Tan
Telescope in
Telescope out
Telescoping actuator
Tilt actuator
Tilt down
Tilt up
Tilt/ telescope switch
Underhood fuse block (right front side of engine compt)

Memory Seat Wiring Diagram (1 of 2) for Cadillac STS 2005

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List of elements for Memory Seat Wiring Diagram (1 of 2) for Cadillac STS 2005:

(left of drive seat, on left frame rail)
(left of driver seat, on left frame rail)
Bat pos voltage
Battery positive voltage
Computer data lines system
Down
Dpm fuse 10a
Driver lumbar adjuster switch
Driver seat adjuster switch
Drv mem st recline mtr pos sens sig
Drv pwr seat frt vert mtr dn ctrl
Drv pwr seat frt vert mtr up ctrl
Drv pwr seat horiz mtr fwd ctrl
Drv pwr seat horiz mtr rwd ctrl
Drv pwr seat lumbar mtr fwd ctrl
Drv pwr seat lumbar mtr rwd ctrl
Drv pwr seat lumbar mtr up ctrl
Drv pwr seat rear vert mtr dn ctrl
Drv pwr seat rear vert mtr up ctrl
Drv pwr seat recline mtr fwd ctrl
Drv pwr seat recline mtr rwd ctrl
Drv seat lumbar dn sw sig
Drv seat lumbar fwd sw sig
Drv seat lumbar rwd sw sig
Drv st lumbar up sw sig
Front vertical down
Front vertical up
G307
Gnd
Horizontal forward
Horizontal rearward
Hot at all times
Left rear fuse block (under left side of rear seat)
Low spd gmlan serial data
Mem mirror pos sens 5v ref
Mem seat/mirror sens low ref
Mem st frt vert mtr pos sens sig
Mem st horiz mtr pos sens sig
Mem st lumbar horiz pos sens sig
Mem st lumbar vert pos sens sig
Mem st rr vert mtr pos sens sig
Memory power tilt & power telescopic circuit
Memory seat module (under driver seat)
Pnk
Power seats circuit breaker 30a
Pwm serial data
Pwr st frt vert dn sw sig
Pwr st frt vert up sw sig
Pwr st horiz fwd sw sig
Pwr st horiz rwd sw sig
Pwr st rear vert dn sw sig
Pwr st rear vert up sw sig
Rear vertical down
Rear vertical up
Rear- ward
Recline forward
Recline rearward
S302
S349 (w/ front heater seat)
S354
Steering column tele mtr fwd
Steering column tele mtr sig
Steering column tilt mtr sig
Steering column tilt mtr up ctrl
Tan

Memory Seat Wiring Diagram (2 of 2) for Cadillac STS 2005

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List of elements for Memory Seat Wiring Diagram (2 of 2) for Cadillac STS 2005:

(16 cm from c300) s362
(20 cm from driver seat adjuster motor assembly conn) s352
(25 cm from c300) s356
(39 cm from driver seat recline mtr conn)
Climate control seat module (passenger) (under right front seat)
Driver lumbar motor assembly
Driver lumbar position sensors
Driver seat adjuster motor assembly
Driver seat front vertical motor
Driver seat front vertical position sensor
Driver seat horizontal motor
Driver seat horizontal position sensor
Driver seat rear vertical motor
Driver seat rear vertical position sensor
Driver seat recline motor assembly
Driver seat recline position sensor
Horizontal
Memory power tilt & power telescopic circuit
Pnk
Pwm serial data
S351
S363 (21 cm from driver seat adjuster motor assembly c2)
Tan
Vertical

Passenger"s Mirror Wiring Diagram for Cadillac STS 2005

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List of elements for Passenger"s Mirror Wiring Diagram for Cadillac STS 2005:

5v feed
5v ref
5v rtn
Bat pos voltage
Computer data lines system
Driver door module (ddm) (inside driver door)
Driver door switch assembly (ddsa)
Driver dr mod fuse 10a
Front passenger door module (fpdm) (inside right front door)
G200 (behind left kick panel)
G201 (behind right kick panel)
Gnd
Ground
Horiz motor
Horiz pos sens
Horiz pos sensor
Hot at all times
Left
Left horiz
Left rear fuse block (under left side of rear seat)
Logic
Low ref
Low spd gmlan serial data
Mirror switches
Pass horiz pos sens sig
Pass mir mtr lft ctrl
Pass vert pos sens sig
Passenger outside rearview mirror
Right
Right horiz
Right rear fuse block (under right side of rear seat)
Rt frt dr mod fuse 10a
Rt mir mtr dn ctrl
Rt mir mtr up/rt ctrl
S500
S501
S502 (w/ infotainment system 012, 014 & 015)
S600
S602 (w/ infotainment system 011, 012, 014 & 015)
Sel left
Sel right
Vert down
Vert motor
Vert pos sens
Vert pos sensor
Vert up

NAVIGATION

Navigation Wiring Diagram for Cadillac STS 2005

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List of elements for Navigation Wiring Diagram for Cadillac STS 2005:

(coax)
(in center console compt) auxiliary audio/ video control
3.6l
4.6l
Am/fm1
Am/fm1 antenna signal
Antenna
Antenna 14v sw pwr
Antenna 14v switched pwr
Antenna coax c5
Aux aud lt sig
Aux aud rt sig
Aux det sig
Aux detect sig
Aux vid hi sig
Aux video hi sig
Aux video hi sig c1
Bare
Base
Battery
Case ground
Cell telephone voice signal
Cellular microphone signal
Coaxial cable
Computer data lines system
Drain wire
Drn wire
Engine control module (ecm) (3.6l: front of engine, on right valve cover) (4.6l: on left front frame rail, below left headlamp assembly)
Fm2
Fm2 antenna sig
G402 (in rear compt, to rear of left rear shock tower)
Global positioning system (gps) antenna
Gps sig
Ground
Hot at all times
Inside rearview mirror (isrvm)
Interior lights system
Led backlight dim cntrl
Left audio signal (1)
Lo speed gmlan ser data
Luxury
Nca
Pnk
Radio
Radio antenna coax
Radio antenna module (above center rear of headliner)
Radio rear window antenna
Radio/ onstar fuse 10a
Rear object sensor control module (in left side of rear compt, under rear shelf)
Right audio signal (1)
Right rear fuse block (under right side of rear seat)
S15
S18
Splice pack
Vehicle communication interface module (vcim) (in rear compt, near right rear strut tower)
Vics-fm3 antenna
Voice recog aud low ref
Voice recog low
Voice recog sig
Vss
W/ hid headlamps
W/ vehicle communication system

Parking Assistant Wiring Diagram for Cadillac STS 2005

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List of elements for Parking Assistant Wiring Diagram for Cadillac STS 2005:

(rear of left rear shock tower) g402
Backup lamp sply voltage
Center amber ind
Center amber ind ctrl
Ground
Hot at all times
Hot in run & start
Ign 1 voltage
Left amber ind
Left amber ind ctrl
Left rear corner object sensor (left corner of rear bumper)
Left rear fuse block (under left side of rear seat)
Left rear middle object sensor (left middle of rear bumper)
Low reference
Lr corner object sens sig
Lr middle object sens sig
Navigation circuit
Object sens low ref
Object sens sply voltage
Pnk
R36
R37
R38
R40
Rear integration module (rim)
Rear object sensor control module
Rear parking assist (rpa) diagnostic connector
Rear parking assist (rpa) display
Rear parking assist chime
Rear parking assist chime sig
Rear parking diagnostic sig
Red ind
Red ind crtl
Rev lamp relay
Reverse fuse 10a
Reverse relay control
Right rear corner object sensor (right corner of rear bumper)
Right rear fuse block (under right side of rear seat)
Right rear middle object sensor (right middle of rear bumper)
Rim fuse 10a
Rr corner object sens sig
Rr middle object sens sig
S403
S414
Sensor signal
Telltale assembly sply voltage
Vehicle speed sig

PASSIVE RESTRAINTS

Passive Restraints Wiring Diagram for Cadillac STS 2005

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List of elements for Passive Restraints Wiring Diagram for Cadillac STS 2005:

(under center console)
Airbag fuse 10a
Battery b+
Case ground
Class 2 (sdm)
Drvr seat belt sw low
Drvr seat belt sw sig
G306
G307 (left of driver's seat, on left frame rail)
Gmlan serial data
Hot at all times
Hot in run & start
Ign 3 fuse 10a
Inflatable restraint sensing & diagnostic module (sdm) (under rear of center console)
Instrument panel cluster (ipc)
Left front seat belt retractor
Left front seat belt switch
Left rear fuse block (under left side of rear seat)
Logic
Pass seat belt sw sig
Pnk
Right front seat belt retractor
Right front seat belt switch
Right rear fuse block (under right side of rear seat)
Run/crank ign 1
Seat belt ind
Signal ground
Splice pack sp201 (under dashboard, near firewall grommet)
Splice pack sp300
Splice pack sp303 (right side of passenger's seat, on right frame rail)

POWER DISTRIBUTION

Power Distribution Wiring Diagram (1 of 7) for Cadillac STS 2005

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List of elements for Power Distribution Wiring Diagram (1 of 7) for Cadillac STS 2005:

(3.6l)
(3.6l: engine harn, 15cm from fuel injector 5 conn) (4.6l engine harn, 14 cm from fuel injector 7 conn) s101
(3.6l: engine harn, 30 cm from ebcm connector) (4.6l: engine harn, 25 cm from brake pressure sensor connector)
(4.6l)
(ignition coil harn, 30 cm from ignition coil module 1 conn) s142
(not used)
(right front side of engine compartment) underhood fuse block
3.6l
36 cm from tcm connector)
4.6l
Automatic headlamp dimming fuse 10a
Automatic headlamp dimming relay
Battery
Blower relay
C1 h
Camshaft position (cmp) actuator solenoid exhaust bank 1
Camshaft position (cmp) actuator solenoid exhaust bank 2
Camshaft position (cmp) actuator solenoid intake bank 1
Camshaft position (cmp) actuator solenoid intake bank 2
Data link connector (dlc)
Ebcm fuse 50a
Ecm/tcm fuse 10a
Electronic brake control module (ebcm)
Engine control
Engine control module (ecm)
Evaporative emission (evap) canister purge solenoid valve
Evaporative emission (evap) canister purge solenoid valve (4.6l)
Front blower fuse 40a
Fuel injector
Fusible link
Generator
Heated oxygen sensor (ho2s) bank 1 sensor 1
Heated oxygen sensor (ho2s) bank 2 sensor 1
Hfv6 ecm fuse 15a
Hi speed fan fuse 30a
Hi speed fan relay
Ignition coil/ module
Ignition coil/ module 1
Ignition coil/ module 3
Ignition coil/ module 5
Instrument panel cluster (ipc)
Instrument panel module (ipm)
Intake manifold tuning valve (imtv) solenoid
Ipm/ aldl fuse 10a
Low speed fan fuse 30a
Low speed fan relay
Main relay
Module (ecm) (4.6l)
Odd inj/ coil fuse 15a
Pnk/ (engine harn, 14 cm from fuel injector 7 conn) s102
Pre o2/ cam fuse 15a
R14
R19
R20
R39
R40
R47
R48
R49
R50
R51
R52
Red
Remote control door lock receiver (rcdlr)
S/p fan relay
S109
S118
S127 (engine poa harn, 18 cm from ignition coil 1 conn)
S136
Spare fuse
Starter
To underhood fuse block (horn relay) (diagram 2 of 7)
To underhood fuse block (post o2 fuse, 10a) (diagram 3 of 7)
Transmission control module (tcm)
V8 ecm fuse 10a
Volt check fuse 10a

Power Distribution Wiring Diagram (2 of 7) for Cadillac STS 2005

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List of elements for Power Distribution Wiring Diagram (2 of 7) for Cadillac STS 2005:

(right front side of engine compartment) underhood fuse block
(w/ hid headlamps)
A/c compressor clutch relay
Accessory relay
Ccp fuse 10a
Comp clutch fuse 10a
Distance sensing cruise control module (w/ auto adaptive cruise control)
Fog lamp fuse 15a
Fog lamp relay
From instrument panel module (diagram 4 of 7)
From underhood fuse block a (main relay) (diagram 1 of 7)
G104 (on right front frame rail, near bumper bracket)
Hdlp washer circuit breaker 30a
Head up display (hud)
Headlamp leveling module
Headlamp washer fluid pump fluid
Headlamp washer fluid pump relay
High beam relay
Horn fuse 15a
Horn relay
Hud fuse 10a
Hvac control module
L rear fuse 60a
Low beam relay
Outside moisture sensor
Park lamp relay
R rear fuse 60a
R31
R32
R36
R37
R56
Rain sensor hdlp fuse 7.5a
S411
Spare fuse
Spare relay
Tilt/ telescope switch
Tilt/lk lmp/clm relay coils fuse 10a
Tire pressure monitor module
To left rear fuse block (alc relay fuse, 10a) (diagram 5 of 7)
To left rear fuse block (driver door module fuse, 10a) (diagram 5 of 7)
To right rear fuse block (ign 1 relay) (diagram 7 of 7)
To right rear fuse block (power windows motor circuit breaker, 30a) (diagram 6 of 7)
Windshield wiper/ washer module
Windshield wiper/ washer switch
Wpr mod fuse 30a
Wpr sw vics fuse 7.5a

Power Distribution Wiring Diagram (3 of 7) for Cadillac STS 2005

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List of elements for Power Distribution Wiring Diagram (3 of 7) for Cadillac STS 2005:

(3.6l: engine harn, 52 cm from ho2s bank 1 sensor 2 conn) (4.6l: engine harn, 34 cm from c102) s104
(engine harn, 16 cm from fuel injector 8 conn) s103
(engine harn, 39 cm from brake pressure sensor conn)
(engine poa harn, 25 cm from ignition coil 2 conn) s119
(ignition coil harn, 36 cm from ignition coil module 2 conn) s131
(in passenger compt, behind right kick panel)
(not used)
(right front side of engine compartment) underhood fuse block
3.6l
4.6l
A/c comp clutch relay
Auxiliary power outlet
Engine control module (ecm)
Even inj/ coils fuse 15a
Fog lamp relay
From right rear fuse block (ignition 1 fuse, 10a) (diagram 7 of 7)
From underhood fuse block b (pre o2/cam fuse, 15a) (diagram 1 of 7)
Front auxiliary power outlet
Fuel injector (4.6l)
Fuel injector 2
Fuel injector 4
Fuel injector 6
G104 (on right front frame rail, near bumper bracket)
G201
Heated oxygen sensor (ho2s) bank 1 sensor 2
Heated oxygen sensor (ho2s) bank 2 sensor 2
I/p outlet fuse 20a
Ign 1 relay
Ignition coil 2
Ignition coil 4
Ignition coil 6
Ignition coil/ module 2
Ignition coil/ module 4
Ignition coil/ module 6
Ignition coil/ module 8
Instrument panel cluster (ipc)
Outlet fuse 30a
Pnk
Post fuse 10a
R43
R44
R45
R46
R55
R64
Rear auxiliary power outlet
S105
S137
S212
S311
S312
Spare fuse
Starter fuse 30a
Starter relay
Tcm/ipc/ ecm fuse 15a
To underhood fuse block (wash noz/aqs fuse, 10a) (diagram 4 of 7)
Transmission control module (tcm)
Underhood fuse block (right front side of engine compt)

Power Distribution Wiring Diagram (4 of 7) for Cadillac STS 2005

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List of elements for Power Distribution Wiring Diagram (4 of 7) for Cadillac STS 2005:

(not used)
Abs fuse 15a
Accessory voltage
Accy ind cntrl
Accy led sig
Air quality sensor
Backlight lmp cntrl
Ccp fuse 10a
Electronic brake control module (ebcm)
From underhood fuse block (ign 1 relay) (diagram 3 of 7)
Ground
Hvac control module
Ign 1 voltage
Ign mode sw ref vlt
Ignition mode switch
Instrument panel module (right side of dash, behind glove box)
Interior lights system
Left heated washer nozzle
Maf fuse 10a
Maf/ iat sensor (3.6l)
Mode control
Mode control b/u
Mode voltage
Off in cntrl
Off led sig
Pnk
Rear defog relay
Remote control door lock receiver (under rear speaker shelf)
Right heated washer nozzle
Right rear fuse block (under right side of rear seat)
Run ign 3 voltage
Spare fuse
Splice pack sp201
Splice pack sp300
Start ind cntrl
Start led sig
Starter relay
Starter relay fuse 10a
To accessory relay (diagram 2 of 7)
To ign 1 relay (diagram 7 of 7)
To ign 3 relay (diagram 6 of 7)
Underhood fuse block (right front of engine compartment)
Voltage b/u
Wash noz/ aqs fuse 10a

Power Distribution Wiring Diagram (5 of 7) for Cadillac STS 2005

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List of elements for Power Distribution Wiring Diagram (5 of 7) for Cadillac STS 2005:

(in driver door harn, 54 cm from c500) s502
(under left side of rear seat) left rear fuse block
A/t shift shift lever assembly
Airbag fuse 10a
Alc relay fuse 30a
Amp fuse 30a
Audio amplifier
Automatic level control (alc) compressor
Automatic leveling control (alc) compressor relay
Dpm fuse 10a
Driver adjuster seat switch
Driver back cooled seat blower motor
Driver cushion cooled seat blower motor
Driver door module (ddm)
Driver door module fuse 10a
Driver lumbar adjuster switch
Elc solenoid fuse 30a
Electronic suspension control (esc) module
Electronics suspension control (esc) module fuse 25a
From underhood fuse block (l rear fuse, 60a) (connector c2, pin 1) (diagram 2 of 7)
From underhood fuse block (l rear fuse, 60a) (connector c2, pin 2) (diagram 2 of 7)
Inflatable restraint sensing & diagnostic module (sdm)
Joint connector
Left front door subwoofer speaker
Left position lamp relay
Left rear door module (lrdm)
Left rear fuse block (ign 3 relay) (diagram 6 of 7)
Memory seat module (msm)
Nca
Position lamps fuse 10a
R15
R18
R27
R29
R31
R32
R36
R37
Rear door module fuse 15a
Rear speaker (subwoofer) fuse 15a
Rear subwoofer speaker
Rev lamp relay
Reverse lamp fuse 10a
Right position lamp relay
Right rear door module (rrdm)
S12
S13
S14
S20
S21
S22 (not used)
S23
Spare fuse
Splice pack
Standing lamp relay
Theft/ shifter fuse 10a
Trk dr rel sol relay
Trunk door/ valet fuse 7.5a
Tv antenna module
Tv/vics fuse 10a
W/ infotainment system 010
W/ infotainment system 012, 014 & 015

Power Distribution Wiring Diagram (6 of 7) for Cadillac STS 2005

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List of elements for Power Distribution Wiring Diagram (6 of 7) for Cadillac STS 2005:

(body harn, 58 cm from right rear fuse block c1) s302
(body harn, 86 cm from g306) s303
(in driver seat harn, 20 cm from driver seat adjuster motor assembly conn)
(in passenger seat harn, 32 cm from c307) s355
(not used)
(under right side of rear seat) right rear fuse block
A/t shift shift lever assembly
Automatic leveling control (alc) compressor relay
Canister vent fuse 10a
Climate control seat module
Digital radio receiver
Driver window motor
Evaporative emissions (evap) canister vent solenoid valve
From instrument panel module (via splice pack sp300, pin 31) (diagram 4 of 7)
From left rear fuse block (trunk door/ valet fuse, 7.5a) (diagram 5 of 7)
From underhood fuse block (r rear fuse, 60a) (connector c3, pin 2) (diagram 2 of 7)
Front passenger window motor
Fuel pump fuse 15a
Fuel pump relay
G402 (in rear compt, to rear of left rear shock tower)
Ign 3 fuse 10a
Ign 3 relay
Left front seat belt retractor
Left rear fuse block (under left side of rear seat)
Left rear window motor
Memory seat module (msm)
Nca
Passenger back cooled seat blower motor
Passenger climate control seat module
Passenger cushion cooled seat blower motor
Passenger lumbar adjuster switch
Passenger seat adjuster switch
Power seats circuit breaker 30a
Power window circuit breaker 30a
R12
R21
R22
R23
R25
R37
Radio
Radio/ onstar fuse 10a
Rear heated seat control module
Rear heated seat fuse 20a
Rear integration module (rim)
Rf htd st/ s-band fuse 20a
Right front seat belt retractor
Right rear window motor
Right turn signal fuse 10a
S15
S16
S17
S352
Spare fuse
Splice pack
Stop lamp relay
Stop lamps fuse 10a
Sunroof control module
Sunroof fuse 20a
Vehicle communication interface module (vcim)
W/ power lumbar control seats
W/o power lumbar control seats

Power Distribution Wiring Diagram (7 of 7) for Cadillac STS 2005

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List of elements for Power Distribution Wiring Diagram (7 of 7) for Cadillac STS 2005:

(in passenger door harn, 34 cm from front passenger window motor conn) s602
(in steering column harn) s221
After boil fuse 10a
After boil relay (4.6l)
Air bag fuse 10a
From instrument panel module (via splice pack sp201, pin 8) (diagram 4 of 7)
From underhood fuse block (r rear fuse, 60a) (diagram 2 of 7)
Front passenger door module (fpdm)
Fuse 7.5a
G401 (in rear compt, to rear of right rear shock tower)
Heated steering wheel control module
Htd stg/ clm fuse 15a
Ign 1 fuse 10a
Ign 1 relay
Inflatable restraint sensing & diagnostic module (sdm)
Inflatable restraint steering wheel module coil
Inside rear view mirror
Int lamp relay
Interior lamp fuse 10a
Left turn signal fuse 10a
Nca
Pnk
R16
R17
R21
R22
R23
R25
R26
R27
Rear defog fuse 40a
Rear defog relay
Rear integration module (rim)
Rear object sensor control module
Right front door subwoofer speaker
Right rear fuse block (under right side of rear seat)
Rim fuse 10a
Rt frt dr mod fuse 10a
S10 (not used)
S11
S22
S23
S25
S3 (not used)
Splice pack
Steering column lock control module
Theft deterrent alarm siren
To underhood fuse block (a/c comp clutch relay) (diagram 3 of 7)
W/ infotainment system 010
W/ infotainment system 012, 011, 014 & 015

POWER DOOR LOCKS

Power Door Locks Wiring Diagram (1 of 3) for Cadillac STS 2005

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List of elements for Power Door Locks Wiring Diagram (1 of 3) for Cadillac STS 2005:

(in right rear fuse block) ign 1 relay
(right side of dash, behind glove box) instrument panel module
Automatic transmission shift lever assembly
Backup keyless entry antenna
Battery positive
Coax
Computer data lines system
Ecm/tcm fuse 10a
Exterior rear compartment lid release switch
G402 (in rear compt, rear of left rear shock tower)
G404 (on left "c" pillar)
Ground
Headliner keyless entry antenna
Hot at all times
Ignition 1 voltage
Ignition mode switch
Keyless entry antenna
Left front door handle antenna
Lf door handle sw
Low spd gmlan data
Pnk
R21
Rear compartment keyless entry antenna
Rear window keyless entry antenna
Remote control door lock receiver (rcdlr) (under rear speaker shelf)
Rf door handle sw
Right front door handle antenna
Rke ant
Rke ant active sig
Rke ant clock sig
Rke ant low ref
Rke ant low ref 1
Rke ant low ref 2
Rke ant low ref 3
Rke ant low ref 4
Rke ant low ref 5
Rke ant sig 1
Rke ant sig 2
Rke ant sig 3
Rke ant sig 4
Rke ant sig 5
Splice pack sp201 (under dash, near firewall grommet)
Tan
Trunk release ctrl
Underhood fuse block (in engine compt, next to left strut tower)

Power Door Locks Wiring Diagram (2 of 3) for Cadillac STS 2005

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List of elements for Power Door Locks Wiring Diagram (2 of 3) for Cadillac STS 2005:

Battery b+
Computer data lines system
Door ajar sw sig
Door ajar switch
Door handle sw sig
Door key sw sig
Door key switch
Door latch ctrl
Door latch motor
Door lock ctrl
Door lock motor
Door lock sig
Door open sw sig
Door open switch
Door unlatch ctrl
Door unlock ctrl
Door unlock sig
Driver door handle switch assembly
Driver door latch assembly
Driver door module (ddm) (in door)
Driver door module fuse 10a
Driver door status indicator
Driver door switch
Driver door switch assembly
G200 (behind left kick panel)
G201 (behind right kick panel)
Gmlan data
Gmlan serial data
Ground
Hot at all times
Illumination
Interior lights system
Left rear door latch assembly
Left rear door module (lrdm) (in door)
Left rear fuse block (under left side of rear seat)
Lift switch
Lock
Pnk
Rear door module fuse 15a
Rear lid release
Right rear door latch assembly
Right rear door module (rrdm) (in door)
S500
S501
S503 (in driver door harn)
S700
S800
Status ind ground
Tan
Unlatch enable switch
Unlock

Power Door Locks Wiring Diagram (3 of 3) for Cadillac STS 2005

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List of elements for Power Door Locks Wiring Diagram (3 of 3) for Cadillac STS 2005:

(behind left kick panel) g200
Battery b+
Computer data lines system
Door ajar sw sig
Door ajar switch
Door handle sw sig
Door latch ctrl
Door latch motor
Door lock sw sig
Door open sw sig
Door open switch
Door unlatch ctrl
Door unlock sw sig
Front passenger door handle switch assembly
Front passenger door latch assembly
Front passenger door lock switch
Front passenger door module (fpdm) (in door)
Front passenger door status indicator
G201 (behind right kick panel)
G402 (in rear compt, rear of left shock tower)
Gmlan serial data
Ground
Hot at all times
Instrument panel module
Interior lights system
Interior rear compartment release switch
Left rear fuse block (under left side of rear seat)
Lift switch
Lock
Pnk
R31
R32
R33
R35
Rear integration module (rim) (under left side of rear shelf)
Right rear fuse block (under right side of rear seat)
Rt frt door module fuse 15a
S20
S21
S22
S23
S501
S600
S601
S603 (in front passenger door harn)
Splice pack
Status ind ground
Trunk ajar sig
Trunk diode
Trunk door release relay
Trunk door/ valet fuse 7.5a
Trunk lid release actuator
Trunk release ctrl
Unlatch enable switch
Unlock
Valet lockout sw
Valet switch

POWER MIRRORS

Automatic Day/Night Mirror Wiring Diagram for Cadillac STS 2005

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List of elements for Automatic Day/Night Mirror Wiring Diagram for Cadillac STS 2005:

(rear of left rear shock tower)
Backup lamp voltage
Class 2 serial data
Computer data lines system
Driver door module (ddm) (inside driver door)
Exterior lights system
G402
Ground
Hot at all times
Hot in run or start
Ignition voltage
Inside rearview mirror (isrvm)
Left rear fuse block (below left rear seat)
Low reference
Mirror signal
Pnk
R36
R37
R38
R40
Rear integration module (under package shelf trim panel)
Rev lamp fuse 10a
Rev lamp relay
Reverse lamp ctrl
Right rear fuse block (below right rear seat)
Rim fuse 10a
W/high intensity discharge headlamps
W/o high intensity discharge headlamps

Power Mirrors Wiring Diagram for Cadillac STS 2005

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List of elements for Power Mirrors Wiring Diagram for Cadillac STS 2005:

(in driver door harness
32 cm from driver window
Battery
Class 2 serial data
Computer data lines system
Down mirror switch sig
Driver door module (on driver door, under door trim panel)
Driver door switch assembly
Driver dr mod fuse 10a
Driver mirror motor horizontal ctrl
Driver mirror motor horizontal/ver ctrl
Driver mirror motor vertical ctrl
Driver outside rearview mirror
Front passenger door module (on front passenger door, under door trim panel)
G200 (behind left kick panel)
G201 (behind right kick panel)
Gnd
Ground
Horiz motor
Hot at all times
Left
Left mirror select switch sig
Left mirror switch sig
Left rear fuse block (near left side of rear seat, under carpet)
Left sel
Logic
Motor connector)
Passenger mirror motor horiz/ver ctrl
Passenger mirror motor horizontal ctrl
Passenger mirror motor vertical ctrl
Passenger outside rearview mirror
Right
Right mirror select switch sig
Right mirror switch sig
Right rear fuse block (near right side of rear seat, under carpet)
Right sel
Rt frt dr mod fuse 15a
S500
Serial data class 2
Up mirror switch sig
Vert motor

POWER SEATS

Climate Control Seats Wiring Diagram for Cadillac STS 2005

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List of elements for Climate Control Seats Wiring Diagram for Cadillac STS 2005:

(in driver seat harness, 15 cm from msm c1 s358
(in passenger seat harness, 10 cm from passenger climate control seat module c2) s361
(left of driver seat, on left frame rail) g307
Battery
C12
Climate control seat module
Dpm fuse 10a
Driver back cooled seat blower motor
Driver cushion cooled seat blower motor
Driver cushion heated seat element
Driver heated seat back element
Fan spd cntrl
G307 (left of driver seat, on left frame rail)
G402 (in rear compt, to rear of left rear shock tower)
Ground
Harness, 24 cm from passenger climate control seat module c1) s357
Hot at all times
Ign 3
Ign 3 fuse 10a
Ign 3 vltg
Ignition 3 relay
Instrument panel module (right side of dash, behind glove box)
Left rear fuse block (under left side of rear seat)
Low ref
Memory seat module (under driver seat)
Ntc sig
Passenger back cooled seat blower motor
Passenger cushion cooled seat blower motor
Passenger cushion heated seat element
Passenger heated seat back element
Pnk
Pwm data
R21
R22
R23
R25
Rf htd st/ s-band fuse 20a
Right rear fuse block (under right side of rear seat)
S349
S350
S354
S355
S359 (in passenger seat harness, 27 cm from passenger cushion cooled seat blower motor connector)
S360 (in driver seat harness, 21 cm from msm c2)
Sp300
Sply vltg
Sply vtlg

Front Seat Heater Wiring Diagram for Cadillac STS 2005

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List of elements for Front Seat Heater Wiring Diagram for Cadillac STS 2005:

(in driver seat harness, 15 cm from msm c1 s358
(in passenger seat harness, 10 cm from passenger climate control seat module c2) s361
(left of driver seat, on left frame rail) g307
Battery
C12
Climate control seat module
Driver cushion heated seat element
Driver heated seat back element
G307 (left of driver seat, on left frame rail)
G402 (in rear compt, to rear of left rear shock tower)
Ground
Harness, 24 cm from passenger climate control seat module c1) s357
Hot at all times
Ign 3
Ign 3 fuse 10a
Ign 3 vltg
Ignition 3 relay
Instrument panel module (right side of dash, behind glove box)
Left rear fuse block (under left side of rear seat)
Low ref
Memory seat module (under driver seat)
Ntc sig
Passenger cushion heated seat element
Passenger heated seat back element
Pnk
Pwm data
R21
R22
R23
R25
Rf htd st/ s-band fuse 20a
Right rear fuse block (under right side of rear seat)
S349
S350
S355
Sp300
Sply vltg
Sply vtlg

Heated Steering Wheel Wiring Diagram for Cadillac STS 2005

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List of elements for Heated Steering Wheel Wiring Diagram for Cadillac STS 2005:

(in steering column harness) s228
(not used)
C276
C277
Fuse 7.5a
G200 (in passenger compt, behind left kick panel)
G401 (in rear compt, to rear of right rear shock tower)
Gnd
Heated steering wheel
Heated steering wheel control module (in steering column, under steering wheel)
Hot at all times
Htd strg/ clm fuse 15a
Ign 1
Ign 3
Ignition 1 relay
Ind ctrl
Inflatable restraint steering wheel module coil
Instrument panel module (right side of dash, behind glove box)
Left steering wheel controls
Nca
Pnk
Right rear fuse block (under right side of rear seat)
Right steering wheel controls
S221
S224
Sens sig
Sp201 (on dash harness, under dashboard, near firewall grommet)

Passenger"s Lumbar Wiring Diagram for Cadillac STS 2005

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List of elements for Passenger"s Lumbar Wiring Diagram for Cadillac STS 2005:

Battery
Down
Fwd
G307 (left of driver seat, on left frame rail)
Gnd
Horizontal
Hot at all times
Left rear fuse block (under left side of rear seat)
Lumbar motor down control
Lumbar motor forward control
Lumbar motor rearward control
Lumbar motor up control
Passenger lumbar adjuster switch
Passenger lumbar motor assembly
Pnk
Power seat circuit breaker 30a
Rwd
S350 (w/ heated seats)
S353
Vertical

Power Seats Wiring Diagram for Cadillac STS 2005

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List of elements for Power Seats Wiring Diagram for Cadillac STS 2005:

Battery
Down
Driver seat adjuster motor assembly
Driver seat adjuster switch
Driver seat front vertical motor
Driver seat horizontal motor
Driver seat rear vertical motor
Driver seat recline motor
Front vertical down
Front vertical up
Fwd
G307 (left of driver seat, on left frame rail)
Gnd
Horizontal forward
Horizontal rearward
Hot at all times
Left rear fuse block (under left side of rear seat)
Memory fuse 10a
Nca
Passenger seat adjuster motor assembly
Passenger seat adjuster switch
Passenger seat front vertical motor
Passenger seat horizontal motor
Passenger seat rear vertical motor
Passenger seat recline motor
Power seat circuit breaker 30a
Rear
Rear vertical down
Rear vertical up
Recline forward
Recline rearward
S349 (w/ heated seats)
S350 (w/ heated seats)
S353 (w/ power lumbar)
S354
Tan

Rear Heated Seats Wiring Diagram for Cadillac STS 2005

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List of elements for Rear Heated Seats Wiring Diagram for Cadillac STS 2005:

(in rear seat back harness, 10 cm from c315)
(in rear seat back harness, 15 cm from heated rear seat module c1) s365
(in rear seat back harness, 32 cm from right rear heated seat back element connector)
(in rear seat back harness, 39 cm from right rear heated seat back element connector) s367
(not used)
G402 (in rear compt, to rear of left rear shock tower)
Ground
Hot in run
Ignition 3
Left rear back heated seat element
Left rear cushion heated seat element
Left rear fuse block (under left side of rear seat)
Left rear high temperature indicator
Left rear low temperature indicator
Left rear medium temperature indicator
Lr element cntrl
Lr element sply
Lr high ind
Lr htd sw sig
Lr low ind
Lr med ind
Lr temp sns
Lr temp sns low
Not used
Pnk
Rear auxiliary hvac control module (center of rear console)
Rear heated seat module (in center of rear seat back)
Rear htd seats fuse 20a
Right rear back heated seat element
Right rear cushion heated seat element
Right rear heated seat switch
Right rear high temperature indicator
Right rear low temperature indicator
Right rear medium temperature indicator
Rr element cntrl
Rr element sply
Rr high ind
Rr htd sw sig
Rr low ind
Rr med ind
Rr temp sns
Rr temp sns low
S366
S368
Sw suply vltg

POWER TOP/SUNROOF

Power Top/Sunroof Wiring Diagram for Cadillac STS 2005

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List of elements for Power Top/Sunroof Wiring Diagram for Cadillac STS 2005:

(rear of right rear shock tower on "d" pillar)
Battery positive voltage
Coil control
Dimming
G401
G402 (in rear compartment, to rear of left rear shock tower)
Ground
Hot at all times
Interior lights system
Pnk
Rap relay
Rear integration module (in left side of rear compartment, under rear shelf)
Right rear fuse block (near right side of rear seat, under carpet)
Roof close
Roof express
Roof open
S310
Shade close
Shade express
Shade open
Sunroof control module (above headliner, near rear of sunroof)
Sunroof enable signal
Sunroof fuse 20a
Sunroof switch data 1
Sunroof switch data 2
Sunroof switch data 3
Sunroof switch data 4
Sunroof switch data 5
Sunroof switch data 6
Sunroof/front sunshade switch
Tan

POWER WINDOWS

Power Windows Wiring Diagram (1 of 2) for Cadillac STS 2005

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List of elements for Power Windows Wiring Diagram (1 of 2) for Cadillac STS 2005:

Battery
Computer data lines system
Down
Driver door module (inside driver door)
Driver door module fuse 10a
Driver window motor
Front passenger door module (inside right front door)
Front passenger window motor
Front passenger window switch
G200 (behind left kick panel)
G201 (behind right kick panel)
Ground
Hot at all times
Interior lights system
Joint connector
Left rear fuse block (under left side of rear seat)
Lf pwd mtr down sig
Lf pwd mtr up sig
Lo spd gmlan
Logic
Power window motor circuit breaker 30a
Pwd status
Rear door module fuse 15a
Rf express signal
Rf pwd down sig
Rf pwd mtr down sig
Rf pwd mtr up sig
Rf pwd up sig
Right rear fuse block (under right side of rear seat)
Rt frt dr mod fuse 10a
S12
S13
S14
S303
S500
S502 (w/ infotaiment system 012, 014 & 015)
S600
S601
S602 (w/ infotaiment system 012, 014 & 015)

Power Windows Wiring Diagram (2 of 2) for Cadillac STS 2005

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List of elements for Power Windows Wiring Diagram (2 of 2) for Cadillac STS 2005:

Battery
Computer data lines system
Down
Driver door switch assembly (ddsa)
Drv window down sig
Drv window express sig
Drv window up sig
Front passenger down sig
Front passenger express sig
Front passenger up sig
G200 (behind left kick panel)
G201 (behind right kick panel)
Ground
Interior lights system
Left rear door module (inside left rear door)
Left rear window motor
Left rear window switch
Lo spd gmlan
Logic
Lr express sig
Lr pwd down sig
Lr pwd mtr down sig
Lr pwd mtr up sig
Lr pwd up sig
Lr window down sig
Lr window express sig
Lr window up sig
Pwd status
Right rear door module (inside right rear door)
Right rear window motor
Right rear window switch
Rr express signal
Rr pwd down sig
Rr pwd mtr down sig
Rr pwd mtr up sig
Rr pwd up signal
Rr window down sig
Rr window express sig
Rr window up sig
S501
S700
S800
Window lock out

RADIO

Radio Wiring Diagram, Base (1 of 2) for Cadillac STS 2005

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List of elements for Radio Wiring Diagram, Base (1 of 2) for Cadillac STS 2005:

(coax)
(in center console compt) auxiliary audio/ video control
(in rear compartment, near right rear strut tower) vehicle communication interface module (vcim)
(pins 11-16 not used)
3.6l
4.6l
Am/fm1
Am/fm1 antenna signal
Antenna
Antenna 14v sw pwr
Antenna 14v switched pwr
Aux aud lt sig
Aux aud rt sig
Aux audio screen (1)
Aux det sig
Aux detect sig
Aux vid hi sig
Aux video hi sig
Bare
Battery
Case ground
Cell tele voice low sig
Cell tele voice sig
Cell telephone voice signal
Cellular microphone signal
Coaxial cable
Computer data lines system
Drain wire
Drn wire
Engine control module (ecm) (3.6l: front of engine, on right valve cover) (4.6l: on left front frame rail, below left headlamp assembly)
Fm2
Fm2 antenna sig
G402 (in rear compt, to rear of left rear shock tower)
Global positioning system (gps) antenna
Gps sig
Ground
Hot at all times
Inside rearview mirror (isrvm)
Interior lights system
Led backlight dim cntrl
Left audio signal (1)
Left front lo lev aud (-)
Left front lo lev aud sig
Left tv audio signal
Lo speed gmlan ser data
Nca
Pnk
Radio
Radio antenna coax
Radio antenna module (above center rear of headliner)
Radio rear window antenna
Radio/ onstar fuse 10a
Rear object sensor control module (in left side of rear compt, under rear shelf)
Right audio signal (1)
Right front aud drain wire
Right front lo lev aud (-)
Right front lo lev aud sig
Right rear fuse block (under right side of rear seat)
Right tv audio signal
S15
S18
Satellite radio circuit
Splice pack
Tan
Tv audio lo ref
Vics-fm3 antenna
Voice recog aud low ref
Voice recog aud sig
Vss
W/ hid headlamps
W/ vehicle communication system

Radio Wiring Diagram, Base (2 of 2) for Cadillac STS 2005

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List of elements for Radio Wiring Diagram, Base (2 of 2) for Cadillac STS 2005:

(in body harn, 40 cm from g200)
(pins 20-32 not used)
(pins 22-38 not used)
1.18k ohms
1.27k ohms
2.37k ohms
6.98k ohms
715 ohms
Acc gap adj/ radio cntrl sig
Amp fuse 30a
Audio amplifier (on left rear quarter panel bracket)
Battery
C276
C277
Cellular telephone voice low ref
Cellular telephone voice signal
Center i/p speaker
Computer data lines system
Cruise control system
Front center spkr (+)
Front center spkr (-)
Fuse 2a
G402 (in rear compt, to rear of left rear shock tower)
Gmlan class 2 serial data
Ground
Harn)
Hot at all times
Inflatable restraint steering wheel module coil (behind steering wheel)
Inflatable restraint wheel steering module coil fuse holder
Instrument panel module (ipm) (behind glove box)
Left fnt low level audio sig
Left fnt low level audio sig (-)
Left front door speaker
Left front i/p speaker
Left front spkr out (+)
Left rear door speaker
Left rear fuse block (under left side of rear seat)
Left rear midrange spkr out (+)
Left rear midrange spkr out (-)
Left steering wheel controls
Left subwoofer spkr out (-)
Low spd gmlan ser data
Mute (gap +)
Nca
Ohms
Pre seek
Rear subwoofer speaker
Rear subwoofer spkr (+)
Red
Rem radio cntrl head accy pwr
Right fnt low level audio sig
Right fnt low level audio sig (-)
Right front door speaker
Right front i/p speaker
Right front spkr out (+)
Right front spkr out (-)
Right rear door speaker
Right rear midrange spkr out (+)
Right rear midrange spkr out (-)
Right steering wheel controls
S205
S207 (in body harn, 58 cm from g200)
S208 (in body harn, 36 cm from g201)
S209 (in body harn, 41 cm from g201)
S225
S229 (in steering column harn)
Seek dn
Seek up
Srce (gap -)
Tan
Voice req
Vol down
Vol up

Radio Wiring Diagram, Luxury (1 of 3) for Cadillac STS 2005

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List of elements for Radio Wiring Diagram, Luxury (1 of 3) for Cadillac STS 2005:

(coax)
(in center console compt) auxiliary audio/ video control
(in rear compartment, near right rear strut tower) vehicle communication interface module (vcim)
(pins 11-16 not used)
3.6l
4.6l
Am/fm1
Am/fm1 antenna signal
Amp aud prmpt drain wire
Amp aud prompt sig (+)
Amp audio prompt sig (-)
Antenna
Antenna 14v sw pwr
Antenna 14v switched pwr
Aux aud lt sig
Aux aud rt sig
Aux audio screen (1)
Aux det sig
Aux detect sig
Aux vid hi sig
Aux video hi sig
Bare
Bare bare
Battery
Case ground
Cell tele voice low sig
Cell tele voice sig
Cell telephone voice signal
Cellular microphone signal
Cntr chnl lo lev aud sig
Cntr chnl lo lev aud sig(-)
Coaxial cable
Computer data lines system
Drain wire
Drn wire
Engine control module (ecm) (3.6l: front of engine, on right valve cover) (4.6l: on left front frame rail, below left headlamp assembly)
Fm2
Fm2 antenna sig
G402 (in rear compt, to rear of left rear shock tower)
Global positioning system (gps) antenna
Gps sig
Ground
Hot at all times
Inside rearview mirror (isrvm)
Interior lights system
Led backlight dim cntrl
Left audio signal (1)
Left front lo lev aud (-)
Left front lo lev aud sig
Left rear aud drain wire
Left rear lo lev aud (-)
Left rear lo lev aud sig
Left tv audio signal
Lo speed gmlan ser data
Nca
Pnk
Radio
Radio antenna coax
Radio antenna module (above center rear of headliner)
Radio rear window antenna
Radio/ onstar fuse 10a
Rear object sensor control module (in left side of rear compt, under rear shelf)
Right front aud drain wire
Right front lo lev aud (-)
Right front lo lev aud sig
Right rear fuse block (under right side of rear seat)
Right rear lo lev aud (-)
Right rear lo lev aud sig
Right tv audio signal
S15
S18
Satellite radio circuit
Splice pack
Subwfer lo lev aud sig
Tan
Tv audio lo ref
Vics-fm3 antenna
Voice recog aud low ref
Voice recog aud sig
Vss
W/ hid headlamps
W/ vehicle communication system

Radio Wiring Diagram, Luxury (2 of 3) for Cadillac STS 2005

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List of elements for Radio Wiring Diagram, Luxury (2 of 3) for Cadillac STS 2005:

(gap +)
1.18k ohms
1.27k ohms
2.37k ohms
6.98k ohms
715 ohms
Acc gap adj/ radio cntrl sig
Amp fuse 30a
Amp pwrd wfr cntrl
Bare
C276
C277
Column harn)
Computer data lines system
Control
Cruise
Down
Driver door module fuse 10a
Fuse 2a
G401 (to rear of left rear shock tower)
G402 (to rear of right rear shock tower)
Gnd
Hot at all times
Inflatable restraint
Inflatable restraint steering wheel module coil (behind steering wheel)
Instrument panel module (ipm) (behind glove box)
Left rear door speaker
Left rear fuse block (under left side of rear seat)
Left rear speaker
Left steering
Low spd gmlan ser data
Module coil fuse holder
Mute
Nca
Ohms
Pre
Rear console speaker
Rear speaker (subwoofer) fuse 15a
Rear subwoofer speaker
Red
Rem radio cntrl head accy pwr
Req
Right front door subwoofer speaker
Right rear door speaker
Right rear fuse block (under right side of rear seat)
Right rear speaker
Right steering
Rt frt dr mod fuse 10a
S225
S229 (in steering column harn)
S502
S602
Seek
Srce (gap
Steering
System
Tan
Voice
Vol
Wheel
Wheel controls

Radio Wiring Diagram, Luxury (3 of 3) for Cadillac STS 2005

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List of elements for Radio Wiring Diagram, Luxury (3 of 3) for Cadillac STS 2005:

(in rear compt, to rear of left rear shock tower)
(pins 26-32 not used)
(to rear of right rear shock tower)
Amp aud prompt sig (+)
Amp audio prompt sig (-)
Amp powered woofer cntrl 1
Amp powered woofer cntrl 2
Amp pwrd wfr cntrl
Audio amplifier
Bare
Battery
Cell tele voice low ref
Cell tele voice sig
Center console speaker (+)
Center i/p speaker
Cntr chnl lo lev aud sig
Cntr chnl lo lev aud sig (-)
Computer data lines system
Console center speaker (-)
Driver seat left speaker
Driver seat right speaker
Front center speaker (+)
Front center speaker (-)
G402
Gmlan class 2 serial data
Gnd
Ground
Left fnt low level audio sig
Left fnt low level audio sig (-)
Left frnt seat left speaker (-)
Left frnt seat right speaker (+)
Left front door subwoofer speaker
Left front i/p speaker
Left front seat left speaker (+)
Left front seat right speaker (-)
Left front speaker (+) 2
Left front speaker (-) 2
Left front woofer speaker (+)
Left front woofer speaker (-)
Left rear lo lev aud sig
Left rear lo lev audio (-)
Left rear midrange speaker (+)
Left rear midrange speaker (-)
Left rear shelf speaker (+)
Left rear shelf speaker (-)
Left rear subwoofer speaker (+)
Noise compensation microphone
Noise reduc mic drain wire
Noise reduction mic
Passenger seat left speaker
Passenger seat right speaker
Rear sbwfr speaker (-)
Red
Right fnt low level audio sig
Right fnt low level audio sig (-)
Right frnt seat left speaker (-)
Right frnt seat right speaker (+)
Right front i/p speaker
Right front seat left speaker (+)
Right front seat right speaker (-)
Right front speaker (+) 2
Right front speaker (-) 2
Right front woofer speaker (+)
Right front woofer speaker (-)
Right rear lo lev aud sig
Right rear lo lev audio (-)
Right rear midrange speaker (+)
Right rear midrange speaker (-)
Right rear shelf speaker (+)
Right rear shelf speaker (-)
Subwfer lo lev aud sig
Tan

Satellite Radio Wiring Diagram for Cadillac STS 2005

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List of elements for Satellite Radio Wiring Diagram for Cadillac STS 2005:

(coax)
(to rear of right rear shock tower) g401
Antenna sig
Aux aud scrn
Bare
Battery
Cellular navigation and digital radio antenna
Computer data lines system
Digital radio receiver (in passenger compt, on left side of rear package shelf)
Drain wire
Ground
Hot at all times
Low ref
Lt tv aud sig
Radio
Rf htdst/ s-band fuse 20a
Right rear fuse block (under right side of rear seat)
Rt tv aud sig
Serial data

SHIFT INTERLOCK

Shift Interlock Wiring Diagram for Cadillac STS 2005

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List of elements for Shift Interlock Wiring Diagram for Cadillac STS 2005:

(beneath rear shelf under trim panel)
(in engine harness, 19cm from ho2s bank1)
(lh2)
(ly7)
A/t shift lock solenoid
Brake pedal position sensor (top of brake pedal)
C311
Can low
Computer data lines system
Engine control module(ecm) (3.6l on right valve cover) (4.6l left front frame rail)
Fuse block left rear (under left side of rear seat)
Hot at all times
Instrument panel module(ipm) right side of dash behind glove box)
Logic
Low ref
Remote control door lock receiver (rcdlr)
S113
Sens sig
Serial data wakeup
Shift level assembly
Shift lock control
Shift park signal
Sup volt
Theft/ shifter fuse 10a
Trans control module(tcm) (right front of engine comp)

STARTING/CHARGING

Charging Wiring Diagram for Cadillac STS 2005

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List of elements for Charging Wiring Diagram for Cadillac STS 2005:

3.6l
4.6l
Battery
Battery indicator
Computer data lines system
Current sensor low ref
Current sensor sig
Engine control module (ecm) or (3.6l: front of eng on right right valve cover, 4.6l: on left front frame rail, below left headlamp assembly)
G105 (at back of underhood fuse block)
G106 (on rear side of right cylinder head)
G200 (behind left kick panel)
Gen f-term
Gen l-term
Generator
Gmlan ecm
Gnd
Hi speed gmlan serial data +
Hi speed gmlan serial data -
Hot w/ ignition 1 relay energized
Ign
Ign 1 voltage
Instrument panel cluster (ipc)
Instrument panel module (ipm) (right side of dash, behind glove box)
Lo spd gmlan serial data
Logic
Pnk
Power distribution system
Red
Splice pack sp201 (under dash, near firewall grommet)
Starter
Tan
Tcm/ipc ecm fuse 15a
Underhood fuse block (right front side of eng compt)

Starting Wiring Diagram for Cadillac STS 2005

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List of elements for Starting Wiring Diagram for Cadillac STS 2005:

3.6l
4.6l
Automatic transmission
Battery
Charging circuit
Computer data lines system
Engine control module (ecm) or (3.6l: front of eng on right right valve cover, 4.6l: on left front frame rail, below left headlamp assembly)
G100 (rear side of right cyl head)
G104 (right front frame rail)
G105 (at back of underhood fuse block)
G106 (on rear side of right cylinder head)
G113 (front center of right cyl head)
Hi speed gmlan serial data +
Hi speed gmlan serial data -
Hot in run or start
Ign 1 relay
Ignition mode data signal
Ignition mode switch
Instrument panel module (ipm) (right side of dash, behind glove box)
Ipm high speed gmlan serial data +
Ipm high speed gmlan serial data -
Off
Ohms
Park/neutral signal
Pnk
R43
R44
R45
R46
R63
R64
R65
R66
Red
S106
Start
Starter
Starter fuse 30a
Starter relay
Starter relay coil control
Starter relay fuse 10a
Tan
Transmission manual shift shaft switch assembly
Underhood fuse block (right front side of engine compartment)

SUPPLEMENTAL RESTRAINTS

Supplemental Restraints Wiring Diagram (1 of 2) for Cadillac STS 2005

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List of elements for Supplemental Restraints Wiring Diagram (1 of 2) for Cadillac STS 2005:

(under center console) g306
Airbag fuse 10a
Battery b+
Case ground
Drvr pretensioner high
Drvr pretensioner low
Drvr seat belt sw low
Drvr seat belt sw sig
Forward sensor sig
Gmlan serial data
Hot at all times
Hot in run & start
Inflatable restraint sensing & diagnostic module (sdm) (under rear of center console)
L side impact mod high
L side impact mod low
Left front inflatable restraint side impact module & seat belt pretensioner
Left inflatable restraint front end sensor (left side of upper radiator support)
Left inflatable restraint side impact sensor (base of left "b" pillar)
Left rear fuse block (under left side of rear seat)
Lf discriminating low
Lf head curtain high
Lf head curtain low
Lf side impact sig
Pass i/p stage 1 high
Pass i/p stage 1 low
Pass i/p stage 2 high
Pass i/p stage 2 low
Pass pretensioner high
Pass pretensioner low
Pnk
R side impact mod high
R side impact mod low
Rf discriminating low
Rf discriminating sig
Rf head curtain high
Rf head curtain low
Rf side impact sig
Right front inflatable restraint side impact module & seat belt pretensioner
Right inflatable restraint front end sensor (right side of upper radiator support)
Right inflatable restraint side impact sensor (base of right "b" pillar)
Right rear fuse block (under right side of rear seat)
Run/crank ign 1
Seat belt pretensioner
Shorting clip
Side impact module
Signal ground
Steer whl stage 1 high
Steer whl stage 1 low
Steer whl stage 2 high
Steer whl stage 2 low
Tan

Supplemental Restraints Wiring Diagram (2 of 2) for Cadillac STS 2005

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List of elements for Supplemental Restraints Wiring Diagram (2 of 2) for Cadillac STS 2005:

(left of driver's seat, on left frame rail)
Air bag ind
Class 2 (sdm)
Front passenger door module (fpdm)
G307
Gmlan serial data
Hot in run & start
Ign 3 fuse 10a
Inflatable restraint instrument panel (i/p) module
Inflatable restraint steering wheel module
Inflatable restraint steering wheel module coil
Instrument panel cluster (ipc)
Left front seat belt retractor
Left front seat belt switch
Left inflatable restraint roof rail module (above left "b" pillar)
Left rear fuse block (under left side of rear seat)
Logic
Nca
Pnk
Right front seat belt retractor
Right front seat belt switch
Right inflatable restraint roof rail module (above right "b" pillar)
Right rear door module (rrdm)
Seat belt ind
Shorting clip
Splice pack sp201 (under dashboard, near firewall grommet)
Splice pack sp300
Splice pack sp303 (right side of passenger's seat, on right frame rail)
Stage 1
Stage 2
Tan
Vehicle communication interface module (vcim)

TRANSMISSION

Transmission Wiring Diagram (1 of 2) for Cadillac STS 2005

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List of elements for Transmission Wiring Diagram (1 of 2) for Cadillac STS 2005:

(3.6l: 387 cm from c102) (4.6l: 24 cm from c102)
1-2 shft sol vlv
1-2 shift solenoid valve control
2-3 shft sol vlv
2-3 shift solenoid valve control
3.6l
4-5 shft sol vlv
4-5 shift solenoid valve control
4.6l
751 (or 1551)
A/t iss hi sig
A/t iss lo sig
Automatic transmission
Batt +
Brake switch sig
Computer data lines system
Data wake up
Data wake-up
Ecm/ tcm fuse 10a
Engine control module (ecm) (under left headlamp)
Exterior lights system
G100 (rear side of right cyl head)
G104 (right front frame rail)
G113 (front center of right cyl head)
Gm lan (+)
Gm lan (-)
Ground
Hi spd can +
Hi spd can -
Hi spd ser data +
Hi spd ser data -
Hot at all times
Hot in run or start
Ign 1 relay
Ign 1 vlt
Instrument panel module (ipm)
Oss hi sig
Oss low sig
Park/neutral sig
Pc sol vlv hi cntl
Pc sol vlv lo cntl
Pnk
Power distribution system
Pressure control solenoid
R43
R44
R45
R46
S106
S113 (19 cm from ho2s bank 1 sensor 1)
S147
Tan
Tap up/dwn sw sig
Tcc brk sw sig
Tcc sol vlv cntl
Tcm/ ipc/ ecm fuse 15a
Tft sen lo ref
Tft sens sig
Torque converter clutch (tcc) pwm solenoid valve control
Transmission control module (right front corner of engine compt)
Transmission fluid temperature (tft) sensor
Trs a
Trs b
Trs c
Trs p
Underhood fuse block (right front of engine compt)

Transmission Wiring Diagram (2 of 2) for Cadillac STS 2005

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List of elements for Transmission Wiring Diagram (2 of 2) for Cadillac STS 2005:

1.5k ohms
3.6l
4.42k ohms
4.6l
8.25k ohms
Automatic transmission
Automatic transmission shift lever
Enable switch
G100 (rear side of right cyl head)
G113 (front center of right cyl head)
G201 (behind right kick panel)
G402 (rear of left rear shock tower)
Hot at all times
Hot in run or start
Ign 3 fuse 10a
Ign 3 relay
Instrument panel module (ipm)
R21
R22
R23
R25
Right rear fuse block (under right side of rear seat)
S106
Tap dwn -
Tap up +
Tap up/ tap dwn trans enable switch
Tap up/tap down switch
Transmission input shaft speed sensor
Transmission manual shift shaft switch assembly
Transmission output shaft speed sensor

TRUNK, TAILGATE, FUEL DOOR

Trunk Release Wiring Diagram for Cadillac STS 2005

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List of elements for Trunk Release Wiring Diagram for Cadillac STS 2005:

(in left front door trim harness, 47 cm from driver door lock switch connector) s501
(rear of left rear shock tower) g402
7.5a
Computer data lines system
Driver door module (in driver door)
Driver door switch assembly (ddsa)
Fd1
Fd2
Gnd
Ground
Ground distribution system
Hot at all times
Instrument panel module (ipm) (right side of dash behind glove box)
Interior lights system
Left rear fuse block (below left rear seat)
R31
R32
R33
R35
Rear compart lid ajar switch signal
Rear compartment lid release actuator (center of rear compartment lid)
Rear compartment lid release switch
Rear integration module (rim) (under package shelf trim panel)
Relay ctrl
Release switch
Right rear fuse block (below right rear seat)
S20
S21
S22
S23
Serial data
Signal ground
Splice pack
Switch signal
Trunk diode
Trunk door rel relay
Trunk door/ valet fuse
Valet switch
Valet switch

WARNING SYSTEMS

Warning Systems Wiring Diagram for Cadillac STS 2005

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List of elements for Warning Systems Wiring Diagram for Cadillac STS 2005:

Audible alarm
Audio amplifier (in rear compartment, on left rear quarter panel bracket
Auto
Battery
Class 2 serial data
Computer data lines system
Door ajar signal
Door ajar sw signal
Door locks system
Door open signal
Driver door latch assembly
Driver door module (inside driver door)
Driver seat belt switch (in left front seat belt buckle)
Driver sig
G101 (near left front strut tower, at bottom of inside fender well)
G200 (in passenger compt, behind left kick panel)
Gnd
Ground
Hdlp
Hot at all times
Hot with headlamp switch in park & head
Inflatable restraint sensing & diagnostic module (under rear of center console)
Instrument panel cluster
Instrument panel module (right side of dash, behind glove box)
Ipm/aldl fuse 10a
Keyless entry/ tire pressure antenna signal
Left
Left turn indicator
Lf door sw sig
Lic/dimming fuse 7.5a
Lights on indicator
Logic
Low ref
Low tire pressure indicator
Lt turn sw sig
Nca
Off
Park brake sw sig
Park brake switch (at base of brake pedal)
Park lmp on sw sig
Pnk
Rear window keyless entry antenna
Remote control door lock receiver (under rear speaker shelf)
Right
Right turn indicator
Rt turn sw sig
S226
S500 (in driver door harness 32 cm from driver window motor connector)
Serial data
Sp303 (in passenger compt, on right frame rail, near right side of passenger seat)
Tan
Turn signal/multi-function switch
Underhood fuse block (right front side of engine compt)
Volt check fuse 10a

WIPER/WASHER

Wiper/Washer Wiring Diagram (1 of 2) for Cadillac STS 2005

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List of elements for Wiper/Washer Wiring Diagram (1 of 2) for Cadillac STS 2005:

(not used)
Accessory relay
Accy voltage
Delay
G101 (near left front strut tower, at bottom of inside fender well)
G104 (on right front frame rail, near bumper bracket)
Ground
Hdlp relay control
Hot at all times
Hot in acc or run
Hot in run or start
Ign 1 relay
Instrument panel module (right side of dash, behind glove box)
Int
Left heated washer nozzle
Lo d5
Mist
Off
Off d1
Pnk
R35
R36
R37
R38
R43
R44
R45
R46
Right heated washer nozzle
Sns sig 1
Sns sig 2
Tan
Underhood fuse block (right front of engine compt)
Wash
Wash noz/acc fuse 10a
Washer fluid level sig
Washer pump ctrl
Windshield wiper/ washer module (left rear of engine compt, near windshield)
Windshield wiper/washer switch
Wiper mtr high speed
Wiper sw on signal
Wiper sw signal 1
Wiper sw signal 2
Wiper switch
Wpr mod fuse 30a
Wpr sw/ vics fuse 7.5a

Wiper/Washer Wiring Diagram (2 of 2) for Cadillac STS 2005

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List of elements for Wiper/Washer Wiring Diagram (2 of 2) for Cadillac STS 2005:

A c1
A c2
A c3
Acc vltg
B c1
B c2
B c3
G101 (near left front strut tower, at bottom of inside fender well)
G402 (in rear compt, to rear of left rear shock tower)
Ground
Hdlp wash relay jumper
Headlamp washer circuit breaker 30a
Headlamp washer fluid pump
Headlamp washer fluid pump (in engine compt, mounted to core support, in front of underhood fuse block)
Hot at all times
Outside moisture sensor (behind inside rearview mirror)
Rain sensor/ hdlp wash fuse 7.5a
S310
S411 (w/ uh3)
Sns sig 1
Sns sig 2
Tan
Underhood fuse block (right front of engine compt)
Windshield washer fluid level switch
Windshield washer fluid pump
Windshield/ headlamp washer motor assembly