All Wiring Diagrams for Cadillac CTS 2003

AIR CONDITIONING

Automatic A/C Wiring Diagram (1 of 3) for Cadillac CTS 2003

List of elements for Automatic A/C Wiring Diagram (1 of 3) for Cadillac CTS 2003:

5 volt reference
After boil pump relay ctrl
Air inlet motor
Amb air temp sensor sig
Ambient light sensor signal
Battery
Blower fuse 40a
Blower mtor speed ctrl
Blower relay
Blower relay ctrl
Ccp fuse 10a
Comp clutch fuse 10a
Comp clutch relay
Coolant level switch signal
Door a
Door b
Dr air temp door ctrl b
Driver air temp door ctrl a
Driver air temp posit signal
E10
E11
E12
E13
E14
E15
E16
Evap low temp sens signal
Evaporator temperature sensor
F10
F11
F12
F13
F14
F15
F16
G201 (in passenger compartment, behind right kick pad)
Ground
Hot at all times
Hot in run
Hvac control module (behind center of dash, below radio)
Ign 3 fuse 10a
Ignition 3 voltage
Inside air temp sensor sig
Inside air temperature sensor
Left rear fuse block (below left rear seat)
Left sunload sensor signal
Low reference
Mode door ctrl a
Mode door ctrl b
Mode door position signal
Nca
Pass air temp door ctrl a
Pass air temp door ctrl b
Pass air temp posit signal
Pnk
R51
R52
R53
R54
R55
R56
R57
R58
Recirc door ctrl a
Recirc door ctrl b
Recirculation actuator (on hvac module module, left of blower motor)
Red
Right sunload sensor signal
S117
Serial data
Solid state
Splice pack sp302 (in passenger compartment, on left frame rail, near left side of driver's seat)
Sunload sensor (at front center of passenger compartment, on defroster grill)
Underhood fuse block (at left front of engine compartment)
Volt

Automatic A/C Wiring Diagram (2 of 3) for Cadillac CTS 2003

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List of elements for Automatic A/C Wiring Diagram (2 of 3) for Cadillac CTS 2003:

(in engine harness, approximately 235 cm (98.3 in) from knock sensor 1 connector)
(in passenger compartment, behind right kick pad) g201
2 (or 4)
4 (or 2)
A/c
A/c compressor clutch (on front of a/c compressor)
Accessory
After boil coolant pump (in engine compartment, on right side of engine block)
After boil fuse 10a
After boil relay
Blower motor (in passenger compartment, on right side of hvac module)
Blower motor control processor (in passenger compartment, on lower left side of blower motor)
Blower mtr speed ctrl
Cold
Crank
Def
Driver's air temperature actuator (in passenger compartment, on hvac module)
Dry air temp signal
G100 (in engine compartment, on engine block near starter motor)
Hot
Hot at all times
Ignition switch
Mix motor
Mode actuator
Mode actuator (in passenger compartment, on hvac module)
Mode valve signal
Nca
Off/lock
Pass air temp signal
Passenger's air temperature actuator (in passenger compartment, on hvac module)
Pnk
R11
R12
R13
R15
Red
Right rear fuse block (below right rear seat)
Run
S118
S323
Splice pack sp201 (in passenger compartment, behind ignition switch, near hvac module)
Splice pack sp203 (in passenger compartment, under left side of dash trim pad)

Automatic A/C Wiring Diagram (3 of 3) for Cadillac CTS 2003

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List of elements for Automatic A/C Wiring Diagram (3 of 3) for Cadillac CTS 2003:

(in engine compartment, near left front strut tower at bottom of inside fender well) g101
(in engine compartment, on engine block near starter motor) g100
(on right front corner of vehicle, on right body rail near right headlamp) g104
5v reference
87a
A/c clutch relay ctrl
A/c refrig press sensor
A/c refrigerant pressure sensor (in engine compartment, near left front stut tower)
Coolant bypass solenoid (at upper right corner of radiator)
Coolant level switch (in left front corner of coolant surge tank)
Ect sensor signal
Engine control module (ecm) (at right front corner of engine compartment)
Engine coolant low level
Engine coolant temperature sensor (on top rear of intake manifold)
Feed
Hi speed fan relay
High (or hi) fuse 30a
High speed fan relay ctrl
Hot at all times
Hot in on or start
Htr/vlv/cltch fuse 10a
Left cooling fan (at front of engine compartment, in left side of fan assembly)
Lo speed fan relay
Low
Low fan fuse 30a
Low reference
Low speed fan relay ctrl
Main relay
Main relay ctrl
Outside ambient air temperature sensor (under front bumper, near front grille)
Pnk
R39
R40
R41
R42
R47
R48
R49
R50
Radio
Right cooling fan (at front of engine compartment, in right side of fan assembly)
Rtn
S/p fan relay
S111 (in engine harness, approximately 120 cm (31.5 in) from ho2s bank 2 sensor 1)
Serial data
Sig
Signal
Splice pack sp102 (in right front corner of engine compartment, in front of underhood fuse block
Tan
Underhood fuse block (at left front of engine compartment)

Compressor Wiring Diagram for Cadillac CTS 2003

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List of elements for Compressor Wiring Diagram for Cadillac CTS 2003:

(in engine compartment, on engine block near starter motor) g100
5v reference
A/c clutch relay ctrl
A/c compressor clutch (on front of a/c compressor)
A/c refrig press sens sig
A/c refrigerant pressure sensor (in engine compartment, near left front strut tower)
Accessory
Comp clutch fuse 10a
Comp clutch relay
Crank
Engine control module (ecm) (at right front corner of engine compartment)
Feed
Hot at all times
Hvac control module
Ignition switch
Low reference
Nca
Off/lock
Pnk
R55
R56
R57
R58
Return
Run
Serial data
Sig
Splice pack sp102 (in right front corner of engine compartment, in front of underhood fuse block)
Splice pack sp201 (in passenger compartment, behind ignition switch, near hvac module)
Tan
Underhood fuse block (at left front of engine compartment)

ANTI-LOCK BRAKES

Anti-lock Brakes Wiring Diagram (1 of 2) for Cadillac CTS 2003

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List of elements for Anti-lock Brakes Wiring Diagram (1 of 2) for Cadillac CTS 2003:

(in body harness approx. 80 cm (31.4 in) from vcim connector) s300
(in body harness, approx. 60 cm (23.3 in from p400) s301
(in body harness, approx. 95 cm (37.4 in) from audio amplifier connector) s306
(in engine compartment, on right frame rail, near abs module) g110
(not used)
140 cm (55.1 in) from audio amplifier connector) s302
5 volt reference
Abs indicator signal
Brake press mod valve sig
Brake pump motor
Class 2 serial data
Delivered torque signal
Ebcm fuse 50a
Edc control
Electronic brake control module (ebcm) (at right front corner of engine compartment)
Electronic power steering system
Engine control module (ecm) (in right front corner of engine compartment)
Ground
High effort control
Hot at all times
Lateral accelerometer
Left front wheel speed sensor (on inside of hub)
Left rear wheel speed sensor (on inside of hub)
Lf wheel speed sensor-low ref
Lf wheel speed sensor-signal
Low effort control
Low reference
Lr wheel speed sensor-low ref
Lr wheel speed sensor-signal
Pump motor ground
Pwm output torque deliver
Requested torque signal
Rf wheel speed sensor-low ref
Rf wheel speed sensor-signal
Right front wheel speed sensor (on inside of hub)
Right rear wheel speed sensor (on inside of hub)
Rr wheel speed sensor-low ref
Rr wheel speed sensor-signal
Splice pack sp102 (in right front corner of engine compartment, in front of underhood fuse block)
Splice pack sp200 (above steering column)
Steering wheel pos signal a
Steering wheel pos switch b
Stop lamp switch (in left front of passenger compartment, near top of brake pedal)
Stop lamp switch signal
Stop lp fuse 20a
Tan
Traction control data signal
Underhood fuse block (in right front corner of engine compartment)
Vent tube
Yaw rate sensor signal

Anti-lock Brakes Wiring Diagram (2 of 2) for Cadillac CTS 2003

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List of elements for Anti-lock Brakes Wiring Diagram (2 of 2) for Cadillac CTS 2003:

(in engine harness, approximately 120 cm (47.2 in) from generator connector)
(in passenger compartment, behind right kick pad) g201
5v refer- ence
5v reference
A/t
A11
A12
Abs indicator
Brake fluid pressure sensor (in right front corner of engine compartment, on rear of brake pressure modulator valve)
Class 2 serial data
Computer data lines system
Dash integration module (dim) (under right side of dash, above right closeout/insulator panel)
E10
Ebcm fuse 10a
Electronic prndl
Hot in run
Hvac control module (on center of dash, below radio)
Instrument panel cluster (ipc)
Lateral accelerometer sensor (in passenger compartment, under center console behind sdm)
Lateral sensor signal
Left rear fuse block (in passenger compartment, under left side of rear seat)
Logic
Press
Radio
Rear integration module (rim) (in center rear of passenger compartment, under package shelf trim panel)
S100 (in engine harness, approximately 80 cm (31.5 in) from brake fluid pressure sensor connector)
S101
Splice pack sp200 (above steering column)
Splice pack sp203 (under left side of i/p trim pad)
Splice pack sp303 (behind passenger's seat, near right rear fuse block)
Sport mode
Sport mode switch signal
Steering wheel position sensor (in passenger compartment, at base of steering column)
Steering wheel position signal a
Steering wheel position signal b
Traction control switch
Winter mode
Winter mode switch signal
Yaw rate sens signal
Yaw rate sensor (in passenger compartment, on left side of rear shelf)
Yaw rate sensor signal

ANTI-THEFT

Anti-theft Wiring Diagram (1 of 2) for Cadillac CTS 2003

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List of elements for Anti-theft Wiring Diagram (1 of 2) for Cadillac CTS 2003:

(behind left kick panel) g200
A11
A12
Accessory voltage
Alarm on signal
Armed signal
B10
Battery
C (not used)
Class 2 serial data
Control pwr output
Dash integration module (dim) (in passenger compartment, under right side of i/p above right closeout/ insulator panel)
Door open
Door open switch signal
Driver door latch assembly (at rear of left front door)
Driver door module (ddm) (in left front door, under door trim panel)
Ecm/tcm fuse 10a
Exterior lights system
F (not used)
Ground
Horn relay ctrl
Horns system
Hot at all times
Hot in acc or run
Hot in run or start
Ign 1 voltage
Ignition key
Intrusion sensor (at rear of passenger compartment, on center of headliner)
Left rear door latch assembly (at rear of left rear door)
Left rear door module (lrdm) (on left rear door, under door trim panel)
Left rear fuse block (below left rear seat)
Nca
Park lamp relay ctrl
Pnk
R31
R32
R33
R35
Reader/ exciter
Rear integration module (rim) (in center rear of passenger compartment, under package shelf trim panel)
Right rear door latch assembly (at rear of right rear door)
Right rear door module (rrdm) (on right rear door, under door trim panel)
Right rear fuse block (below right rear seat)
Rim fuse 10a
S121
S313 (in headliner harness, approximately 115 cm (45.6 in) from c311)
Splice pack sp201 (behind ignition switch, near hvac module)
Splice pack sp302 (in passenger compartment, on left frame rail, near left side of driver's seat)
Splice pack sp303 (in passenger compartment, behind passenger's seat near right rear fuse block)
Tan
Theft deterrent control module (at top of steering column)
Theft fuse 7.5a
Transponder
Trunk ajar switch signal
Trunk dr rel sol relay
Trunk dr release fuse 10a
Trunk release relay ctrl
Underhood fuse block (at right front corner of engine compartment)

Anti-theft Wiring Diagram (2 of 2) for Cadillac CTS 2003

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List of elements for Anti-theft Wiring Diagram (2 of 2) for Cadillac CTS 2003:

(in rear compartment to rear of left rear shock tower) g402
B10
Class 2 serial data
Data link connector (dlc) (partial) (in passenger compartment, under i/p, next to hood release lever)
Door open
Door open sw sig
E10
Electronic brake control module (ebcm) (at right front corner of engine compartment)
Engine control module (ecm) (in right front corner of engine compartment)
Front passenger door module (fpdm) (on right front door, under door trim panel)
Gnd
Ground
Hvac control module (in passenger compartment, on center of i/p below radio)
Ign
Instrument panel cluster (ipc)
Logic
Passenger door latch assembly (at rear of right front door)
Radio
Rear compartment lid release actuator (on center rear of rear compartment lid)
S317
Security indicator
Splice pack sp200 (in right front of passenger compartment, under i/p, above steering column)
Splice pack sp201 (behind ignition switch, near hvac module)
Splice pack sp300 (in passenger compartment, on left frame rail, near left side of driver's seat)
Trunk ajar switch signal

BODY CONTROL MODULES

Dash Integration Module Wiring Diagram for Cadillac CTS 2003

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List of elements for Dash Integration Module Wiring Diagram for Cadillac CTS 2003:

(in passenger compartment, behind right kick pad) g201
5 volt reference
A10
A11
A12
Accessory
Accessory voltage
B10
B11
B12
Backlight lamps control
Battery
Cigar relay
Cigar relay coil voltage
Class 2 serial data
Computer data lines system
Control power output
Courtesy lamp switch on signal
Crank
Dash integration module (dim) (in passenger compartment, under right side of i/p above right closeout/insulator panel)
Dim/ aldl fuse 10a
Drl relay ctrl
Exterior lights system
Flash to pass switch signal
Fog lamp relay control
Front fog lamps switch signal
G200 (in passenger compartment, behind left kick pad)
Ground
Ground distribution system
Hazard switch output
Hazard switch signal
Headlamp hi beam relay ctrl
Headlamp switch on signal
Headlamp washer ground
Headlights system
Hi/low beam relay ctrl
Horn relay control
Horns system
Hot at all times
Ignition 1 voltage
Ignition lock cyl switch
Ignition switch
Inst panel lp dimmer sw low ref
Inst panel lp dimmer switch
Interior lights system
Key in ignition switch signal
Lic/dimming fuse 15a
Off/lock
Park lamp relay
Park lamp relay ctrl
Pnk
R31
R32
R33
R34
R59
R62
Run
Shift interlock system
Splice pack sp200 (in right front of passenger compartment, under i/p, above steering column)
Splice pack sp201 (in passenger compartment, behind ignition switch, near hvac module)
Tan
Twilight sentinal delay signal
Underhood fuse block (in engine compartment, in right front corner)
Voltage check fuse 10a
Warnings system
Washer fluid level signal
Wiper switch on signal
Wiper/washer system

Rear Integration Module Wiring Diagram for Cadillac CTS 2003

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List of elements for Rear Integration Module Wiring Diagram for Cadillac CTS 2003:

5007 (or 5053)
A10
A11
A12
Anti-lock brakes system
B10
B11
B12
Battery
Class 2 serial data
Computer data lines system
Courtesy lamp control
Courtesy lamp ctrl
Defogger system
Driver heated seat high/low signal
Exterior lights system
G401 (in rear compartment to rear of right rear shock tower)
Ground
Hot at all times
Hot in on or start
Htd seat ctrl module status signal
Ignition 1 voltage
Interior lights system
Pass htd seat ctrl module status signal
Passenger heated seat high/low signal
Pnk
Power distribution system
Power tops system
Rap relay coil control
Rear defog relay ctrl
Rear integration module (rim) (in center rear of passenger compartment, under package shelf trim panel)
Reverse relay ctrl
Reverse signal (or winter mode signal)
Right rear fuse block (in passenger compartment, under right side of rear seat)
Rim fuse 10a
Rim fuse 15a
Seats system
Shift interlock system
Splice pack sp302 (in passenger compartment, on left frame rail near left side of driver's seat)
Sport mode switch signal
Tan
Traction control switch signal
Transmissions system
Trunk ajar switch ctrl
Trunk release relay ctrl
Trunk, tailgate, fuel doors system
Vehicle speed signal

COMPUTER DATA LINES

Computer Data Lines Wiring Diagram for Cadillac CTS 2003

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List of elements for Computer Data Lines Wiring Diagram for Cadillac CTS 2003:

(in engine harness, approximately 160 cm (62.9 in) from ecm ground) s114
(in passenger compartment, behind left kick pad) g200
A/t
A11
A12
A22
A23
Audio amplifier (in left rear compartment, behind left strut tower)
B11
Base
Bose
Can serial bus +
Can serial bus -
Class 2 serial data
D14
Dash integration module (dim) (under right side of dash above right closeout/ insulator panel)
Data link connector (dlc) (in passenger compartment, under dash next to hood release lever)
Digital radio receiver
Dim/aldl fuse 10a
Driver door module (ddm) (on left door, under door trim panel)
Driver door switch assembly (ddsa)
E10
Electronic brake control module (ebcm) (at right front corner of engine compartment)
Engine control module (ecm) (in right front corner of engine compartment)
Front passenger door module (fpdm) (on right front door, under door trim panel)
Hot at all times
Hvac control module (in passenger compartment, on center of dash below radio)
If equipped
Inflatable restraint sensing & diagnostic module (sdm) (at center of passenger compartment floor, under console)
Instrument panel cluster (ipc)
Key word 2000 serial data
Left rear door module (lrdm) (on left rear door, under door trim panel)
M/t
Memory seat module (msm) (in passenger's compartment, under driver's seat)
Radio
Radio antenna module (in rear of passenger compartment, above headliner near rear window)
Rear integration module (rim) (under package shelf trim panel)
Right rear door module (rrdm) (in center rear of passenger compartment, under package shelf trim panel)
Splice pack sp200 (under dash, above steering column)
Splice pack sp201 (behind ignition switch near hvac module)
Splice pack sp201 (in passenger compartment, behind ignition switch, near hvac module)
Splice pack sp203 (in passenger compartment, under left side of dash trim pad)
Splice pack sp300 (in passenger compartment, on left frame rail, near left side of driver's seat)
Splice pack sp303 (behind passenger's seat, near right rear fuse block)
Theft deterrent control module (at top of steering column)
Transmission control module (tcm) (a/t) (in right front corner of engine compartment)
Underhood fuse block (in right front corner of engine compartment)
Vehicle communication interface module (vcim) (in rear compartment, behind right strut tower)

COOLING FAN

Cooling Fan Wiring Diagram for Cadillac CTS 2003

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List of elements for Cooling Fan Wiring Diagram for Cadillac CTS 2003:

(in engine compartment on engine block near starter motor) g100
(in engine compartment, near left front strut tower at bottom of inside fender well) g101
(in engine compartment, on engine block near starter motor) g100
(on right front corner of vehicle, on right body rail near right headlamp) g104
87a
After boil coolant pump (in engine compartment, on right side of engine block)
After boil fuse 10a
After boil relay
Coolant by-pass solenoid (at upper right corner of radiator)
Coolant level sw
Coolant level switch (in left front corner of coolant surge tank)
E10
E11
Ect sensor signal
Engine control module (ecm) (at right front corner of engine compartment)
Engine coolant low level
Engine coolant temperature sensor (on top rear of intake manifold)
Hi speed fan relay
High fan fuse 30a
High speed fan relay ctrl
Hot at all times
Hot in on or start
Htr/vlv/cltch fuse 10a
Hvac control module
Left cooling fan (at front of engine compartment, in left side of fan assembly)
Lo speed fan relay
Low fan fuse 30a
Low reference
Low speed fan relay ctrl
Main relay
Main relay ctrl
Pnk
R11
R12
R13
R15
R39
R40
R41
R42
R47
R48
R49
R50
Radio
Relay control
Right cooling fan (at front of engine compartment, in right side of fan assembly)
Right rear fuse block (below right rear seat)
S/p fan relay
S111 (in engine harness, approximately 120 cm (31.5 in) from ho2s bank 2 sensor 1)
Serial data
Tan
Underhood fuse block (at left front of engine compartment)

CRUISE CONTROL

Cruise Control Wiring Diagram for Cadillac CTS 2003

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List of elements for Cruise Control Wiring Diagram for Cadillac CTS 2003:

(in passenger compartment, behind left kick pad) g200
(on right front corner of vehicle, on right body rail near right headlamp) g104
A/t
C202
C4 (or c5)
Center steering wheel control switch
Clutch pedal position switch (in passenger compartment, under dash, on clutch pedal)
Cpp switch signal
Cruise control switch signal
Cruise on led
Cruise switch
Engine control module (ecm) (in right front corner of engine compartment)
Extended travel brake switch (opens when brake pedal is depressed)
Extended travel brake switch signal
Hot at all times
Hot in run
Hot in run or crank
Htr vlv/ cltch fuse 10a
Ign 1 relay
Inflatable restraint steering wheel module coil
M/t
Off
Pnk
Power distribution system
R43
R44
R45
R46
R63
R66
Resume/ accel
S118 (in engine harness, approximately 235 cm (98.3 in) from knock sensor 1 connector)
Set/ coast
Splice pack sp200 (in right front of passenger compartment, under dash above steering column)
Splice pack sp203 (in passenger compartment, under left side of dash trim pad)
Starter relay
Starter relay coil ctrl
Starter relay coil voltage
Strng ctrls fuse 10a
Switch fuse 2a
Tcc brake switch/ cruise control release switch
Tcc brake switch/cruise release sig
Tcc/brake switch/ cruise control release signal
Tcc/cruise control release switch (in left front of passenger compartment, near top of brake pedal)
Tcc/et fuse 10a
Transmission control module (tcm) (in right front corner of engine compartment)
Underhood fuse block (in right front corner of engine compartment)

DEFOGGERS

Defoggers Wiring Diagram for Cadillac CTS 2003

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List of elements for Defoggers Wiring Diagram for Cadillac CTS 2003:

(on package shelf, to left of subwoofer) g304
607 (or 628)
A12
Class 2 serial data
Computer data lines system
Driver door module (ddm) (on left front door, under door trim panel)
Driver outside mirror
Feed
Front passenger door module (fpdm) (on right front door, under door trim panel)
Heated motor element
Hot at all times
Hot in run or start
Hvac control module
Logic
Low reference
Nca
Passenger outside mirror
R10
Rear defog fuse 40a
Rear defog relay
Rear defogger
Rear defogger indicator
Rear defogger switch
Rear integration module (rim) (under package shelf trim panel)
Relay control
Right rear fuse block (under right side of rear seat)
Rtn

ELECTRONIC POWER STEERING

Electronic Power Steering Wiring Diagram for Cadillac CTS 2003

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List of elements for Electronic Power Steering Wiring Diagram for Cadillac CTS 2003:

(in engine compartment, on right frame rail, near abs module) g110
Class 2 serial data
Computer data lines system
Ebcm fuse 10a
Electronic brake control module (ebcm) (at right front corner of engine compartment)
Ground
High effort control
Hot in run
Ignition
Left rear fuse block (in passenger compartment, under left side of rear seat)
Low effort control
Variable effort steering actuator (in engine compartment, on power steering gear input shaft)

ENGINE PERFORMANCE

3.2L VIN N

3.2L VIN N, Engine Performance Wiring Diagram (1 of 3) for Cadillac CTS 2003

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List of elements for 3.2L VIN N, Engine Performance Wiring Diagram (1 of 3) for Cadillac CTS 2003:

(in engine harness, 120 cm from ho2s 21)
(in fuel injector harness, near c112)
(left rear of intake plenum) intake manifold runner control solenoid
(near ignition coils)
+5v ref
Case ground
Ckp hi
Ckp low
Cmp sig
Coil 1 ctrl
Coil 2 ctrl
Coil 3 ctrl
Coil 4 ctrl
Coil 5 ctrl
Coil 6 ctrl
Cpp sw sig
Crankshaft position sensor
Cruise control system
Ect sens
Electronic ignition module (bank 1)
Electronic ignition module (bank 2)
Engine control module (front of right valve cover)
Evap purge
Fuel inj 1
Fuel inj 2
Fuel inj 4
Fuel inj 5
Fuel inj 6
Fuel injectors
G100 (near starter motor)
G107
Heated oxygen sensor bank 1 sensor 1 (on right exhaust pipe)
Heated oxygen sensor bank 1 sensor 2 (on right catalytic converter)
Heated oxygen sensor bank 2 sensor 1 (on left exhaust pipe)
Heated oxygen sensor bank 2 sensor 2 (on left catalytic converter)
Ho2s 1,1 htr
Ho2s 1,1 low
Ho2s 1,1 sig
Ho2s 1,2 hi
Ho2s 1,2 htr
Ho2s 1,2 lo
Ho2s 2,1 htr
Ho2s 2,1 low
Ho2s 2,1 sig
Ho2s 2,2 hi
Ho2s 2,2 htr
Ho2s 2,2 lo
Iat sig
Inj 3 ctrl
Intk out 1
Intk out 2
Knock sensor (bank 1) (right side of engine)
Knock sensor (bank 2) (left side of engine)
Ks1 sig
Ks2 sig
Lo ref
Low ref
Maf sig
Mass airflow sensor (right side of air cleaner)
Nca
Oil pres sig
Pnk
S108 pnk
S111
Shld ground
Tac mtr ctrl
Tan
Tan/red
To spark plugs
Tps sens 1
Tps sens 2

3.2L VIN N, Engine Performance Wiring Diagram (2 of 3) for Cadillac CTS 2003

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List of elements for 3.2L VIN N, Engine Performance Wiring Diagram (2 of 3) for Cadillac CTS 2003:

(in engine harness, 120 cm from ho2s 21)
(in front of underhood fuse box)
Camshaft position sensor (left front of engine)
Canister vent fuse 10a
Ecm fuse 15a
Ecm/tcm fuse 10a
Engine coolant temperature sensor (top rear of intake manifold)
Engine oil pressure sensor (aboe oil filter)
Evap canister purge solenoid (right side of engine)
Fuel pump relay
Fuse a 15a
G100 (near starter motor)
G104 (near right head- lamp)
G401 (rear of right shock tower)
Hot at all times
Hot in run or start
Ign 1 relay
Ign mod fuse 15a
Inj fuse 10a
Intake manifold tuning valve solenoid (rear side of intake duct)
Main relay
Manifold fuse 10a
Pnk
Post 02 fuse 15a
Pre fuse 15a
R36
R37
R38
R40
R43
R44
R45
R46
R47
R48
R49
R50
Right rear fuse block (below right rear seat)
S112
Sp102
Tan
Tcc/ cruise release switch
Tcc/et fuse 10a
Tcm/ ipc fuse 15a
Theft fuse 7.5a
Throttle position sensor (top right front of engine)
Under- hood fuse block (left front of eng compt)
Vehicle speed sensor (m/t) (near rear of transmission assembly)

3.2L VIN N, Engine Performance Wiring Diagram (3 of 3) for Cadillac CTS 2003

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List of elements for 3.2L VIN N, Engine Performance Wiring Diagram (3 of 3) for Cadillac CTS 2003:

(engine harn, 160 cm from ecm ground)
(in front of underhood fuse box) sp102
(in rear compt lid harn, 237 cm from c401)
+5v ref
1786 (or 1035)
2000 ser dat
A/c pres
A/c rly ctrl
A/c system
A/t
Acc
Acc volt
Accelerator pedal
Anti-lock brakes system
App 2 sig
App sens1
Automatic transmission manual shift shaft switch assembly
Battery
Can bus +
Can bus -
Charging system
Class 2 data
Computer data lines system
Cooling fans system
Crank
Cruise control system
Data bus
Data link connector (under left side of dash)
Del tor sig
Eng spd sig
Engine control module (front of right valve cover)
Engine speed
Evap canister vent solenoid (above rear differential)
Evap ctrl
Ext brk sig
F lev sig
Fuel lev sns
Fuel level sensor
Fuel pump/ sender assembly
Fuel tank pressure sensor (in fuel tank)
G100 (near starter motor)
G401 (rear of right shock tower)
Gen on sig
Gen signal
Gmlan data
Hot at all times
Ign 1
Ign 1 volt
Ign voltage
Ignition switch
Instrument panel cluster
Logic
Low red
Low ref
M/t
Main rly ctrl
Malfunction indicator lamp
Mil ctrl
Off/ lock
P/n sig
Pnk
Position sensor (above accelerator pedal)
Req torq
Res/accel
Rly coil ctrl
Rly ctrl
Run
S114
S400
Secondary fuel sender assembly
Ser data
Sp102 (in front of underhood fuse box)
Sp202 (near ipc)
Start
Starting system
Stop lamp switch (top of brake pedal)
Stop lp sw fuse 15a
Stp lp sw
Tan
Tcc brk sw
Tcc/brk
Tnk pres sig
Trac ctrl
Transmission control module (right front side of engine compt)
Under- hood fuse block (left front of eng compt)
Vss
Vss signal

EXTERIOR LIGHTS

Back-up Lamps Wiring Diagram for Cadillac CTS 2003

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List of elements for Back-up Lamps Wiring Diagram for Cadillac CTS 2003:

(in engine compartment, on engine block near starter motor) g100
(in rear compartment, to rear of left rear shock tower) g402
A12
C421
Computer data lines system
Hot at all times
Inside rearview mirror (isrvm)
Left back up lamp
Left rear fuse block (below left rear seat)
M/t
R36
R37
R38
R40
Rear integration module (rim) (under package shelf trim panel)
Relay control
Rev lamp relay
Reverse lamp fuse 10a
Reverse lamp switch (near shift control assembly)
Reverse sw signal
Right back up lamp
S401
Serial data

Exterior Lamps Wiring Diagram (1 of 2) for Cadillac CTS 2003

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List of elements for Exterior Lamps Wiring Diagram (1 of 2) for Cadillac CTS 2003:

(in forward lamp harness, approximately 10 cm (3.2 in) from horn assembly) s115
(in passenger compartment, behind left kick pad) g200
(in rear compartment to rear of left rear shock tower) g402
(on right front corner of vehicle, on right body rail near right headlamp) g104
A11
A12
Auto
Battery
Computer data lines system
Control power output
Dash integration module (dim) (under right side of dash, above right closeout/ insulator panel)
Drl relay control
Drl relay ctrl
Ground
Hazard sw signal switch
Hazard switch
Hazard switch output
Hazard switch signal
Hdlp
Headlamp sw on signal
Headlamp switch
Hot at all times
Left front park lamp
Left front park/turn signal lamp
Left front side marker lamp
Left front turn signal
Left front turn/drl out
Left license lamp
Left rear turn lamp
Left turn signal voltage
Lic/dimming fuse 15a
Lt park fuse 10a
Off
Panel lamp voltage
Park lamp relay
Park lamp relay ctrl
Park lamp sw on signal
Pnk
R31
R32
R33
R34
Right front park/turn signal lamp
Right front turn signal
Right front turn voltage
Right front turn/drl out
Right license lamp
Right rear turn lamp
S119
S401
S402
Serial data
Splice pack sp202 (in passenger compartment, under dash trim pad, near instrument panel cluster (ipc))
Splice pack sp203 (in passenger compartment, under left side of dash trim pad)
To underhood fuse block (rt park fuse, 10a) (diagram 2 of 2)
Turn signal hazard flasher module (in left front of passenger compartment, under dash)
Underhood fuse block (at left front of engine compartment)

Exterior Lamps Wiring Diagram (2 of 2) for Cadillac CTS 2003

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List of elements for Exterior Lamps Wiring Diagram (2 of 2) for Cadillac CTS 2003:

(in rear compartment to rear of left rear shock tower) g402
(in rear compartment to rear of right rear shock tower) g401
(in rear compartment, to rear of left rear shock tower) g402
(on right front corner of vehicle, on right body rail near right headlamp) g104
Center high mounted stop lamp (chmsl)
Computer data lines system
E10
Electronic brake control module (ebcm) (at right front corner of engine compartment)
Engine control module (ecm) (at right front corner of engine compartment)
Flasher fuse 15a
From underhood fuse block (lt park fuse, 10a) (diagram 1 of 2)
Hot at all times
Hot in run or crank
Hvac control module (behind center of dash, below radio)
Instrument panel cluster (ipc)
Left rear side marker lamp
Left rear tail/stop lamp
Left turn indicator
Lights on indicator
Pnk
Radio
Right front park lamp
Right front side marker lamp
Right rear side marker lamp
Right rear tail/stop lamp
Right turn indicator
Rt park fuse 10a
S315
S316
S318
S401
S402
Serial data
Splice pack sp200 (in right front of passenger compartment, under dash, above steering column)
Splice pack sp302 (in passenger compartment, on left frame rail, near left side of driver's seat)
Stop lamp switch (near top of brake pedal)
Stop lp sw fuse 15a
Strg ctrls fuse 10a
Underhood fuse block (at left front of engine compartment)

GROUND DISTRIBUTION

Ground Distribution Wiring Diagram (1 of 4) for Cadillac CTS 2003

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List of elements for Ground Distribution Wiring Diagram (1 of 4) for Cadillac CTS 2003:

(in engine compartment, on engine block, near generator) g102
(in engine compartment, on engine near ignition coils) g107
(in engine compartment, on right frame rail, near abs module) g110
(in passenger compartment, on package shelf to left of subwoofer) g304
(in passenger compartment, on right side rear pillar) g303
(in passenger compartment, under center console) g306
(in right side of engine compartment, on inner fender wall, near battery) g105
(no connection)
A/c compressor clutch switch
A/t
A32
After boil coolant pump
Automatic transmission
B12
Battery
Brake fluid level switch
Coolant by-pass solenoid
Coolant level switch
Dash integration module (dim)
Electronic brake control module (ebcm)
Engine control module (ecm)
G100 (in engine compartment, on engine block near starter motor)
G101 (in engine compartment, near left front strut tower, at bottom of inside fender well)
Headlamp washer fluid pump
Ignition control module (icm) bank 1
Ignition control module (icm) bank 2
Inflatable restraint sensing & diagnostic module (sdm)
M/t
Rear window defogger
Reverse switch
Transmission control module (tcm)
Vehicle speed sensor (vss)
W/o high pressure headlamp washer
Washer fluid level switch
Windshield washer fluid pump
Windshield wiper/ washer module
With/ high pressure headlamp washer

Ground Distribution Wiring Diagram (2 of 4) for Cadillac CTS 2003

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List of elements for Ground Distribution Wiring Diagram (2 of 4) for Cadillac CTS 2003:

(at left front of engine compartment) fuse block - underhood
(w/hid) left headlamp
(w/hid) right headlamp
A/t
Accessory relay
Auxiliary cooling fan
Auxiliary power outlet
B12
Blower motor control processor
Cigar lighter
Coil
Cont- acts
Electronic prndl
Front passenger door module (fpdm)
G104 (on right front corner of vehicle, on right body rail near right headlamp)
G201 (in passenger compartment, behind right kick pad)
Headlamp leveling sensor-front
Horn assembly
Hvac control module
Ign 1 relay
Left cooling fan
Left fog lamp
Left headlamp
Left side marker lamp
Left turn signal lamp
M/t
R16
R35
R46
Right fog lamp
Right headlamp
Right rear door module (rrdm)
Right side marker lamp
Right turn signal lamp
S/p fan relay
S308
Splice pack sp203 (in passenger compartment, under left side of dash trim pad)
Traction control switch
Trailer provisions
W/automatic headlamps control leveling system
W/o automatic headlamps control leveling system
W/o hid

Ground Distribution Wiring Diagram (3 of 4) for Cadillac CTS 2003

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List of elements for Ground Distribution Wiring Diagram (3 of 4) for Cadillac CTS 2003:

(in passenger compartment, to left to driver's seat, on left frame rail) g307
B12
Connector)
Dash integration module (dim)
Data link connector (dlc) (partial)
Driver door module (ddm)
Driver heated seat module
Driver seat adjuster switch
G200 (in passenger compartment, behind left kick pad)
Hazard switch
Headlamp switch
Inflatable restraint steering wheel module coil
Instrument panel cluster (ipc)
Key-in ignition switch
Left rear door module (lrdm)
Memory seat module (msm)
Nca
Passenger heated seat module
Passenger seat adjuster switch
S119
S120
S121
S305 (in body harness, approximately 180 cm (70.8 in) from left rear fuse block)
S307 (in left seat harness, approximately 381 cm (150 in) from seat belt switch)
S320 (in right seat harness, approximately 235 cm (92.5 in) from a 14 pin connector under front passenger's seat)
Splice pack sp201 (in passenger compartment, behind ignition switch, near hvac module)
Splice pack sp203 (in passenger compartment, under left side of i/p trim pad)
Steering wheel controls- center
Steering wheel controls- left
Steering wheel controls- right
Theft deterrent control module
Turn/ hazard flasher module
W/8-way adjuster power passenger seat, front heater seat)
W/o 8-way adjuster power passenger seat, front heater seat)

Ground Distribution Wiring Diagram (4 of 4) for Cadillac CTS 2003

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List of elements for Ground Distribution Wiring Diagram (4 of 4) for Cadillac CTS 2003:

(below left rear seat) left rear fuse block
(below right rear seat) right rear fuse block
Audio amplifier
Avec system, am/fm radio, mcd, dvd, navigation & tv
B11
Center high mounted stop lamp (chmsl)
Coil
Fuel pump & sender assembly
Fuel pump relay
G401 (in rear compartment, to rear of right rear shock tower)
G402 (in rear compartment, to rear of left rear shock tower)
If equipped
Ign 1 relay
Ign 3 relay
Inside rearview mirror (isrvm)
Left backup lamp
Left license lamp
Left vanity lamp
Left- tail lamp
Nca
Overhead console courtesy lamp
R21
R25
R36
Radio
Rear compartment lid release actuator
Rear integration module (rim)
Right backup lamp
Right license lamp
Right vanity lamp
Right- tail lamp
S314 (in headliner harness, approximately 125 cm (49.8 in) from 2 pin connector, near radio antenna module)
S401
Splice pack sp300 (in passenger compartment, near left side of driver's seat)
Sunroof control switch
Sunroof module
Traffic information receiver
Tv antenna module
Vehicle communication interface module (vcim)
W/avec system, am/fm radio, icdx, cd rom, navigation, tv, mcd & dvd
W/o avec system, am/fm radio, icdx, cd rom, navigation, tv, mcd & dvd
W/vehicle communication system, gps1

HEADLIGHTS

Headlights Wiring Diagram (1 of 2) for Cadillac CTS 2003

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List of elements for Headlights Wiring Diagram (1 of 2) for Cadillac CTS 2003:

(in passenger compartment, behind left kick pad) g200
(on right front corner of vehicle, on right body rail near right headlamp) g104
A11
A12
Auto
Battery
Class 2 serial data
Computer data lines system
Dash integration module (dim) (under right side of dash, above right closeout/ insulator panel)
Drl relay control
Drl relay ctrl
Flash to pass signal
Flasher fuse 15a
Fog lamp fuse 15a
Fog lamp relay ctrl
Fog lamp switch signal
Fog lp relay
Front fog lamp switch
Ftp
Ground
Hazard signal switch
Hazard switch
Hazard switch output
Hazard switch signal
Head
Headlamp on signal
Headlamp relay control
Headlamp switch
Hi beam relay control
High
Hot at all times
Hot in run or crank
Ign 1 voltage
Left fog lamp
Left front turn signal
Left front turn/drl out
Left turn signal switch signal
Left turn- signal
Low
Low beam relay control
Off
Park
Pnk
Right fog lamp
Right front turn signal
Right front turn/drl out
Right turn signal switch signal
Right turn- signal
S119
Splice pack sp203 (in passenger compartment, under left side of i/p trim pad)
Splice pack sp301 (in passenger compartment, near right side of passenger's seat)
Strg cntrls fuse 10a
Turn signal switch
Turn/hazard flasher module (in left front of passenger compartment, under dash)
Twilight sentinal display
Underhood fuse block (at left front of engine compartment)

Headlights Wiring Diagram (2 of 2) for Cadillac CTS 2003

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List of elements for Headlights Wiring Diagram (2 of 2) for Cadillac CTS 2003:

(on right front corner of vehicle, on right body rail near right headlamp) g104
Ambient light sensor
Ambient light sensor sig
Ballast
Class 2 serial data
Data link connector (dlc) (partial) (in passenger compartment, under i/p next to hood release lever)
E10
Electronic brake control module (ebcm) (at right front corner of engine compartment)
Engine control module (ecm) (at right front corner of engine compartment)
F13
F15
Hi beam
Hi beam relay
Hid lo bm
Hot at all times
Hvac control module (in passenger compartment, on center of i/p below radio)
Instrument panel cluster (ipc)
Left headlamp
Left headlamp (w/hid)
Lo beam
Lo beam relay
Low reference
Lt hi beam fuse 10a
Lt low beam fuse 20a
Nca
R23
R24
R25
R26
R27
R28
R29
R30
Radio
Right headlamp
Right headlamp (w/hid)
Rt hi beam fuse 10a
Rt low beam fuse 20a
Splice pack sp200 (at right front of passenger compartment under i/p, above steering column)
Splice pack sp201 (at right front corner of engine compartment)
Splice pack sp302 (in passenger compartment, on left frame rail, near left side of driver's seat)
Sunload sensor assembly (in front center of passenger compartment on defroster grille)
Underhood fuse block (in right front corner of engine compartment)
W/high intensity discharge headlamps
W/o high intensity discharge headlamps

HORN

Horn Wiring Diagram for Cadillac CTS 2003

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List of elements for Horn Wiring Diagram for Cadillac CTS 2003:

(on right front corner of vehicle, on right body rail near right headlamp) g104
1995 vftc c
C203
Dash integration module (dim) (under right side of dash, above right closeout/insulator panel)
Fuse 2a
High note horn
Horn assembly (in left front corner of vehicle, behind front fascia)
Horn fuse 15a
Horn pan
Horn relay
Horn relay control
Hot at all times
Low note horn
Nca
R10
R11
R12
R13
Tan
Underhood fuse block (on right front corner of engine compartment)

INSTRUMENT CLUSTER

Instrument Cluster Wiring Diagram (1 of 2) for Cadillac CTS 2003

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List of elements for Instrument Cluster Wiring Diagram (1 of 2) for Cadillac CTS 2003:

(early production) clock
(in passenger compartment, behind left kick pad) g200
(not used)
Abs ind signal
Abs indicator
Backlighting
Backlighting control
Battery
Brake indicator
Charge indicator
Class 2 (dim)
Class 2 (ebcm)
Class 2 (ecm)
Class 2 (rim)
Class 2 (sdm)
Clock control
Computer data lines system
Cruise indicator
Ecm/tcm fuse 10a
Electronic brake control module (ebcm) (at right front corner of engine compartment)
Engine coolant temperature indicator
Engine speed signal
Exterior lights system
Fasten safety belt indicator
Front fog lamps indicator
Fuel level
Ground
High beam indicator
Hot at all times
Hot in run or start
Ignition 1 voltage
Instrument panel cluster (ipc)
Interior lights system
Ipc
Led dimming signal
Left turn indicator
Lights on indicator
Logic
Low engine oil pressure indicator
Park brake switch signal
Pnk
Right turn indicator
Security indicator
Serial data
Service engine soon (early production) mil indicator (late production)
Sir indicator
Speedometer
Speedometer control
Splice pack sp200 (in right front of passenger compartment, under dash, above steering column)
Splice pack sp201 (in passenger compartment, behind ignition switch, near hvac module)
Sport mode indicator
Tachometer
Tachometer control
Tcm/ipc fuse 15a
Temperature
Tpm indicator (not used)
Trac off indicator (early production) traction control off indicator (late production)
Trip reset
Trip reset switch signal
Trip/ odometer
Trip/odometer control
Underhood fuse block (at left front of engine compartment)
Vehicle speed signal
Wait to start indicator (not used)
Winter mode indicator

Instrument Cluster Wiring Diagram (2 of 2) for Cadillac CTS 2003

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List of elements for Instrument Cluster Wiring Diagram (2 of 2) for Cadillac CTS 2003:

(in engine compartment, near left front strut tower, at bottom of inside fender well) g101
(in engine harness, aproximately 120 cm from ho2s bank 2 sensor 1)
(in rear compartment to rear of left rear shock tower) g402
2.7 ohms
Brake fluid level switch (at rear of engine compartment, on brake fluid reservoir)
Class 2 serial data
Computer data lines system
Driver information center (dic) switch
E10
Ect sensor signal
Eng/ met
Engine compartment module (ecm) (at right front corner of engine compartment)
Engine coolant temperature (ect) sensor (on top rear of intake manifold)
Engine oil pressure (eop) switch (on front left side of engine, above oil filter)
Engine speed signal
English/ metric signal
Fuel info
Fuel info signal
Fuel level sensor
Fuel pump & sensor assembly (in fuel tank)
Gage info
Gage info signal
Hvac control module (behind center of dash, below radio)
If equipped
Ign
Low reference
Mil control
Odo/ trip
Odometer/ trip signal
Ohms
Oil press signal
Park brake switch (on park brake assembly)
Radio
Reset
Reset signal
S111
S400 (in rear compartment lid harness, approximately 237 cm from c401)
Secondary fuel sender assembly (under vehicle, in fuel tank)
Serial data
Splice pack sp202 (in passenger compartment, under dash trim pad, near ipc)
Tan
Vehicle speed signal

INTERIOR LIGHTS

Courtesy Lamps Wiring Diagram for Cadillac CTS 2003

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List of elements for Courtesy Lamps Wiring Diagram for Cadillac CTS 2003:

(in rear compartment, to rear of left rear shock tower) g402
125 cm from c311) s314
2,000 ohms
40,000 ohms
5v courtesy lamps on signal
5v reference
A10
B10
Backlight lamps control
Courtesy lamp ctrl
Courtesy lp ctrl
Courtesy lp relay ctrl
Courtesy lp voltage
Courtesy lps on signal
Dash integration module (dim) (under right side of dash, above right closeout/ insulator panel)
Dimmer sw low reference
G402 (in rear compartment, to rear of left rear shock tower)
Hot at all times
I/p lamps dimmer switch
Int lamp relay
Interior lamp fuse 10a
Left courtesy lamp
Left footwell courtesy lamp
Left front courtesy lamp
Left sunshade
Left vanity lamps
Nca
Overhead console courtesy lamp
R16
R17
R18
R20
Rear compartment courtesy lamp
Rear dome lamp
Rear integration module (rim) (under package shelf trim panel)
Right courtesy lamp
Right footwell courtesy lamp
Right front courtesy lamp
Right rear fuse block (below right rear seat)
Right sunshade
Right vanity lamps
S311 (in headliner harness, approximately 100 cm from c311)
S312
S314 (in headliner harness, approximately 125 cm from c311)
S314 (in headliner harness, approximately 125 cm from from c311)
S319
Splice pack sp301 (in passenger compartment, on right frame rail, near right side of passenger's seat)
Splice pack sp302 (in passenger compartment, on left frame rail, near left side of driver's seat)
Sunroof control switch
Trunk ajar sw signal

Instrument Illumination Wiring Diagram (1 of 2) for Cadillac CTS 2003

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List of elements for Instrument Illumination Wiring Diagram (1 of 2) for Cadillac CTS 2003:

(in passenger compartment, behind left kick pad) g200
(in rear compartment, to rear of left rear shock tower) g402
2,000 ohms
40,000 ohms
5 volt reference
A11
A12
B11
Backlight lamps ctrl
Backlights lamp ctrl
Battery
Computer data lines system
Control power output
Courtesy lps on signal
Dash integration module (dim) (under right side of dash, above right closeout/insulator panel)
Dim/ aldl fuse 10a
Dimmer switch signal
Driver door lock switch
Driver door module (ddm) (on left door, under door trim)
Driver door switch assembly (ddsa)
Driver dr mod fuse 10a
Electronic prndl
G201 (in passenger compartment, behind right kick pad)
Ground
Hot at all times
Illumination lamp
Inc dim
Instrument panel cluster (ipc)
Led dimming signal
Left rear fuse block (below left rear seat)
Lic/dimming fuse 15a
Low reference
Memory seat switch
Overhead console courtesy lamp
Park i/p switch
Park lamp relay
Pnk
Psgr dr mod fuse 10a
R31
R32
R33
R34
Rear dr mod fuse 10a
Right rear fuse block (below right rear seat)
S308
S314 (in headliner harness, approximately 125 cm (49.8 in) from c311)
S501 (in left front door trim harness, approximately 70 cm from driver window/door lock switch)
Serial data
Splice pack sp302 (in passenger compartment, on left frame rail, near left side of driver's seat)
Sunroof control switch
Underhood fuse block (at left front of engine compartment)

Instrument Illumination Wiring Diagram (2 of 2) for Cadillac CTS 2003

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List of elements for Instrument Illumination Wiring Diagram (2 of 2) for Cadillac CTS 2003:

(in headliner harness, approximately 110 cm from c311) s312
(in left rear door trim harness, approximately 160 cm from c701) s701
(in passenger compartment, behind left kick pad) g200
(in passenger compartment, behind right kick pad) g201
(in right front door trim harness, approximately 70 cm from driver window/door lock switch) s600
(in right rear door trim harness, approximately 160 cm from c801) s801
70 cm from driver window/ door lock switch) s600
70 cm from front passenger window switch) s601
A12
Backlight lamps ctrl
Battery
Computer data lines system
Cruise "on" indicator'
Front passenger door lock switch
Front passenger door module (fpdm) (on right front door, under door trim panel)
Front passenger window switch
Fuse 2a
G200 (in passenger compartment, behind left kick pad)
Gnd
Hazard switch
Illumi- nation lamp
Inflatable restraint steering wheel module coil
Left rear door module (lrdm) (under door trim panel)
Left rear door window switch
Left steering wheel controls
Nca
Off
R/a
Right rear door module (rrdm) (on right rear door, under door trim panel)
Right rear door window switch
Right steering wheel controls
S/c
S119
S120
S314
S315
Serial data
Splice pack sp201 (in passenger compartment, behind ignition switch, near hvac module)
Splice pack sp203 (in passenger compartment, under left side of dash trim pad)
Steering cloumn fuse holder
Steering wheel controls center

MEMORY SYSTEMS

Memory Mirrors Wiring Diagram (1 of 2) for Cadillac CTS 2003

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List of elements for Memory Mirrors Wiring Diagram (1 of 2) for Cadillac CTS 2003:

5v feed
5v reference
5v rtn
A12
B11
B12
Backlight lamps control
Battery
Class 2 serial data
Computer data lines system
Driver door module (ddm) (on left front door, under door trim panel)
Driver door switch module (ddsm) (driver door switch assembly (ddsa))
Driver dr mod fuse 10a
Driver outside rearview mirror
Exit (ext)
G200 (in passenger compartment, behind left kick pad)
Gnd
Ground
Ground rtn
Horiz motor
Horiz pos sensor
Horiz posit sensor
Hot at all times
Interior lights system
Left
Left horiz
Left rear fuse block (under left side of rear seat)
Logic
Low reference
Memory 1 switch signal
Memory 2 switch signal
Memory/personalization function switch (memory seat switch)
Mirror mtr down ctrl
Mirror mtr left ctrl
Mirror mtr right ctrl
Mirror mtr up ctrl
Mirror switches
Nca
Right
Right horiz
S501 (or s502) (in left front door trim harness, approximately 70 cm (27.3 in) from driver window/door lock switch (or ddsa))
Sel left
Sel right
Vert down
Vert motor
Vert pos sensor
Vert up
Vertical posit sensor

Memory Mirrors Wiring Diagram (2 of 2) for Cadillac CTS 2003

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List of elements for Memory Mirrors Wiring Diagram (2 of 2) for Cadillac CTS 2003:

(in body harness, approximately 255 cm (100.5 in) from sp303) s303
(in passenger compartment, behind right kick pad) g201
5v feed
5v reference
5v rtn
A12
B12
Battery
Class 2 serial data
Computer data lines system
Dr mod pwr c/b 30a
Front passenger door module (fpdm) (on right front door, under door trim panel)
Ground
Horiz motor
Horiz pos sensor
Horizontal posit sensor
Hot at all times
Left horiz
Low reference
Mirror mtr down ctrl
Mirror mtr left ctrl
Mirror mtr right ctrl
Mirror mtr up ctrl
Passenger outside rearview mirror
Psgr dr mod fuse 10a
Right horiz
Right rear fuse block (under right side of rear seat)
Vert down
Vert motor
Vert pos sensor
Vert up
Vertical posit sensor

Memory Seat Wiring Diagram (1 of 2) for Cadillac CTS 2003

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List of elements for Memory Seat Wiring Diagram (1 of 2) for Cadillac CTS 2003:

(in body harness, approximately 555 cm (218.5 in) from c700) s304
(in left seat harness, approximately 10 cm (3.2 in) from driver seat horizontal position sensor) s348
5 volt reference
Battery positive voltage
Class 2 serial data
Driver seat adjuster switch
E10
E11
E12
E13
E14
E15
E16
F10
F11
F12
F13
F14
F15
F16
Front vertical down
Front vertical motor down control
Front vertical motor up control
Front vertical up
G307 (to left of driver's seat, on left frame rail)
Ground
Horizontal forward
Horizontal forward switch signal
Horizontal motor forward ctrl
Horizontal motor rearward control
Horizontal rearward
Horizontal rearward switch signal
Hot at all times
Left rear fuse block (under left side of rear seat)
Low reference
Mem/adapt seat fuse 10a
Memory seat module (msm) (in passenger compartment, under driver's seat)
Rear vertical down
Rear vertical motor down control
Rear vertical motor up control
Rear vertical posit sens signal
Rear vertical up
Recline back switch signal
Recline forward
Recline forward switch signal
Recline motor forward control
Recline motor rearward control
Recline posit sens signal
Recline rearward
S320 (in right seat harness, approximately 235 cm (92.5 in) from c307)
Seat horiz posit sensor signal
Seats circuit breaker 30a
Tan
Vertical down switch signal
Vertical posit sens signal
Vertical up switch signal

Memory Seat Wiring Diagram (2 of 2) for Cadillac CTS 2003

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List of elements for Memory Seat Wiring Diagram (2 of 2) for Cadillac CTS 2003:

(under driver's seat) driver seat front vertical motor
(under driver's seat) driver seat horizontal motor
(under driver's seat) driver seat rear vertical motor
(under driver's seat) driver seat recline motor
Backlight lamps control
Class 2 serial data
Driver door module (ddm) (on left front door, under door trim panel)
Driver door switch assembly (ddsa)
Driver seat front vertical position sensor (under driver's seat)
Driver seat horizontal position sensor (under driver's seat)
Driver seat rear vertical position sensor (under driver's seat)
Driver seat recline position sensor (under driver's seat)
Exit (ext)
Gnd
Ground
Interior lights system
Memory 1 sw signal
Memory 1 switch signal
Memory 2 sw signal
Memory 2 switch signal
Memory/personalization function switch (memory seat switch)
Nca
S348 (in left seat harness, approximately 10 cm (3.2 in) from driver seat horizontal position sensor)
S349 (in left seat harness, approximately 150 cm (59.2 in) from driver seat rear vertical position sensor)
S502 (in left front door trim harness, approximately 70 cm (27.3 in) from ddsa)
Splice pack sp300 (on left frame rail, near left side of driver's seat)
Tan

NAVIGATION

Navigation Wiring Diagram for Cadillac CTS 2003

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List of elements for Navigation Wiring Diagram for Cadillac CTS 2003:

(coaxial cable)
Audio amplifier (in left of rear compartment, behind left stut tower)
Audio fuse 10a
Bare
Battery
Class 2 serial data
Computer data lines system
Drain wire
G303 (on right side rear pillar)
G402 (in rear compartment, to rear of left rear shock tower)
Gps antenna
Ground
Hot at all times
Left rear fuse block (under left side of rear seat)
Mic out feed
Mic out return
Nav voice in (+)
Nav voice out (-)
Navigation voice low ref
Navigation voice signal
Nca
Phone antenna
Pnk
Radio
S309
Vehicle communication interface module (vcim) (in rear compartment, behind right strut tower)
Voice output (+)
Voice output (-)
Voice output ground

POWER DISTRIBUTION

Power Distribution Wiring Diagram (1 of 7) for Cadillac CTS 2003

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List of elements for Power Distribution Wiring Diagram (1 of 7) for Cadillac CTS 2003:

(at left front of engine compartment) underhood fuse block
(in engine harness, approximately 200 cm (78.5 in) from ho2s bank 1 sensor 1) s112
(in fuel injector harness, near 7 cavity in-line connector, engine to fuel injector harness, at rear of intake manifold) s108
A/t
A12
Air conditioning & cooling fans systems
Air conditioning system
Battery
Blower fuse 40a
Blower relay
Ccp fuse 10a
Coil
Dash integration module (dim)
Data link connector (dlc) (partial)
Dim/ aldl fuse 10a
Ebcm fuse 50a
Ecm/tcm fuse 10a
Electronic brake control module (ebcm)
Engine control module (ecm)
Engine control module (ecm) (at right front corner of engine compartment)
Evaporative emissions (evap) canister purge valve solenoid
Flasher fuse 15a
Fuel injector
Generator
Heated oxygen sensor (ho2s) bank 1 sensor 2
Heated oxygen sensor (ho2s) bank 2 sensor 2
Hi fan fuse 30a
Hi speed fan relay
Hvac control module
Inj fuse 10a
Instrument panel cluster (ipc)
Intake manifold runner control (imrc) solenoid
Intake manifold tuning valve (imtv) solenoid
Left rear fuse block (below left rear seat)
Lo (or low fan) fuse 30a
Lo speed fan relay
Main relay
Main relay control
Manifold fuse 10a
Mass air flow (maf) sensor
Pnk
Post 02 fuse 10a
Pusher fan relay
R14
R19
R20
R39
R40
R47
R48
R49
R50
R51
R52
Red
S/p fan relay
Spare fuse
Starter
Stop lamp switch
Stop lp sw fuse 15a (or 20a)
Theft deterrent module
To underhood fuse block (ecm fuse, 15a) (diagram 3 of 7)
To underhood fuse block (horn relay) (diagram 2 of 7)
Transmission control module (tcm)
Turn/ hazard flasher module
Volt check fuse 10a

Power Distribution Wiring Diagram (2 of 7) for Cadillac CTS 2003

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List of elements for Power Distribution Wiring Diagram (2 of 7) for Cadillac CTS 2003:

(at left front of engine compartment) underhood fuse block
(on right front corner of vehicle, on right body rail near right headlamp) g104
A/t
Accessory relay
Air conditioning system
Comp (clu) clutch relay
Comp clutch fuse 10a
Drl relay
Early production before vin number
Elec prndl fuse 10a
Electronic prndl
Engine control module (ecm)
Exterior lights system
Fog lamp fuse 15a
Fog lamp relay
From ignition switch (via splice pack sp200, pin 21) (diagram 4 of 7)
From underhood fuse block a (main relay) (diagram 1 of 7)
Hdlp wash circuit breaker 30a
Hdlp washer relay
Headlamp washer relay
Headlights system
High (hi) beam relay
Horn fuse 15a
Horn relay
Horns system
Ign sw fuse 10a
Jumper wire
L rear fuse 60a
Late production vin 105858 & after
Lo beam relay/ hid
Park lamp relay
R rear fuse 60a
R10
R11
R24
R28
R30
R32
R35
R36
R37
R56
R67
R68
Red
Spare fuse
Theft deterrent control module
Theft fuse 7.5a
To ignition switch (pin 6) (diagram 4 of 7)
To left rear fuse block (driver dr mod fuse, 10a) (diagram 5 of 7)
To left rear fuse block (l position relay) (diagram 5 of 7)
To right rear fuse block (dr mod pwr circuit breaker, 30a) (diagram 6 of 7)
To right rear fuse block (rim fuse, 10a) (diagram 4 of 7)
To underhood fuse block (cigar relay) (diagram 3 of 7)
Transmission control module (tcm)
Windshield wiper/ washer module
Windshield wiper/ washer switch
Wiper/ washer system
Wpr mod fuse 30a
Wpr sw fuse 10a

Power Distribution Wiring Diagram (3 of 7) for Cadillac CTS 2003

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List of elements for Power Distribution Wiring Diagram (3 of 7) for Cadillac CTS 2003:

(accessory relay) (diagram 2 of 7)
(in passenger compartment, behind right kick pad) g201
(on right front corner of vehicle, on right body rail near right headlamp) g104
A/t
Auxiliary power outlet
B+ mode
Battery saver mode
Camshaft position (cmp) sensor
Cigar lighter
Cigar relay
Clutch pedal position (cpp) sensor (m/t)
Coil
Comp clutch relay
Coolant bypass valve
Dash integration module (dim) (under right side of dash, above right closeout/insulator panel)
Ecm fuse 15a
Engine control module (ecm)
Fog lamp relay
From ignition switch (via splice pack sp201 (pin 8) (diagram 4 of 7)
From underhood fuse block (manifold fuse, 10a) (diagram 1 of 7)
From underhood fuse block h
Heated oxygen sensor (ho2s) bank 1 sensor 1
Heated oxygen sensor (ho2s) bank 2 sensor 1
Htr vlv/ cltch fuse 10a
I/p outlet fuse 20a
Ign 1 relay
Instrument panel cluster (ipc)
M/t
Outlet fuse 30a
Pnk
Pre 02 fuse 10a
R43
R44
R45
R46
R55
R59
R60
R61
R62
R63
R64
S308 (a/t)
Splice pack sp 102 (in front of underhood fuse block)
Splice pack sp200 (above steering column)
Splice pack sp203 (in passenger compartment, under left side of dash trim pad)
Starter fuse 30a
Starter relay
Starting/charging system
Tcc/clutch release switch
Tcc/et fuse 10a
Tcm/ipc fuse 15a
To underhood fuse block (wash noz fuse 10a, (diagram 4 of 7)
Transmission control module (tcm)
Underhood fuse block (at left front of engine compartment)

Power Distribution Wiring Diagram (4 of 7) for Cadillac CTS 2003

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List of elements for Power Distribution Wiring Diagram (4 of 7) for Cadillac CTS 2003:

(not used)
A11
Accessory
Battery
C202
Center steering wheel control switch
Coil
Crank
Crank voltage
Dash integration module (dim) (under right side of dash, above right closeout/insulator panel)
Engine control module (ecm) (at right front corner of engine compartment)
From underhood fuse block (ign sw fuse, 10a) (diagram 2 of 7)
From underhood fuse block (r rear fuse, 60a) (connector c3, pin 1) (diagram 2 of 7)
From underhood fuse block (tcc/et fuse, 10a) (diagram 3 of 7)
Headlamp switch
Ign mod fuse 15a
Ignition 1
Ignition coil bank 1
Ignition coil bank 2
Ignition lock cylinder control actuator
Ignition switch
Inflatable restraint steering wheel module coil
Left headlamp
Left heated washer nozzle
Nca
Off/lock
Pnk
Rear defog relay
Red
Right headlamp
Right heated washer nozzle
Right rear fuse block (below right rear seat)
Rim fuse 10a
Run
S200
S318
Spare fuse
Splice pack sp200 (in right front of passenger compartment, under dash, above steering column)
Splice pack sp201 (in passenger compartment, behind ignition switch, near hvac module)
Splice pack sp302 (in passenger compartment, on left frame rail, near left side of driver's seat)
Strg ctrls fuse 10a
Switch fuse 2a
To left rear fuse block (ign 3 relay) (diagram 6 of 7)
To right rear fuse block (ign 1 relay) (diagram 7 of 7)
To underhood fuse block (accessory relay) (connector c4, pin c7) (diagram 2 of 7)
To underhood fuse block (comp clutch relay) (diagram 3 of 7)
Underhood fuse block (at left front of engine compartment)
W/heated windshield washer nozzle
Wash noz fuse 10a

Power Distribution Wiring Diagram (5 of 7) for Cadillac CTS 2003

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List of elements for Power Distribution Wiring Diagram (5 of 7) for Cadillac CTS 2003:

(below left rear seat) left rear fuse block
(not used)
A12
Amp fuse 30a
Audio amplifier
Audio fuse 10a (or 15a)
Driver door module (ddm)
Driver dr mod fuse 10a
Driver power seat switch
Driver seat heated seat module
Exterior lights system
F11
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)
L frt htd seat mod fuse 10a
L position relay
Left rear door module (lrdm)
Left rear fuse block (ign 3 relay) (diagram 6 of 7)
Mem/adapt seat fuse 10a
Memory seat module
Position lamp fuse 10a
R position relay
R13
R15
R18
R20
R26
R27
R29
R31
R32
R36
R37
Radio
Rear dr mod fuse 15a
Red/ (in left seat harness, approximately 10 cm (3.2 in) from driver seat horizontal position sensor) s348
Rev lamp relay
Reverse lamp fuse 10a
Right rear door module (rrdm)
Spare fuse
Spare relay
Splice pack sp301 (near right side of passenger's seat)
Standing lamp relay
Trk dr rel sol relay
Trunk dr release fuse 10a
Trunk, tailgate & fuel door release system
Vehicle communication interface module (vcim)
W/ 8 speaker system
W/o 8 speaker system

Power Distribution Wiring Diagram (6 of 7) for Cadillac CTS 2003

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List of elements for Power Distribution Wiring Diagram (6 of 7) for Cadillac CTS 2003:

(below right rear seat) right rear fuse block
(in body harness, approximately 255 cm (100.5 in) from splice pack sp303 behind passenger's seat, near right rear fuse block) s303
(in body harness, approximately 555 cm (218.5 in) from 14 cavity in-line connector, on left rear door jamb, near door hinges) s304
(in rear compartment, to rear of left rear shock tower) g402
(not used)
A/t shift lock control solenoid
After boil fuse 10a
After boil relay
Ccp fuse 10a
Cooling fans system
Dr mod pwr circuit breaker 30a
Driver door module (ddm)
Driver heated seat module
Driver power seat switch
Ebcm fuse 10a
Electronic brake control module (ebcm)
Engine controls system
From ignition switch (via splice pack sp302) (diagram 4 of 7)
From left rear fuse block (trk dr rel sol relay) (diagram 5 of 7)
From underhood fuse block (r rear fuse, 60a) (connector c3, pin 2) (diagram 2 of 7)
Fuel pump motor relay
Fuel pump mtr fuse 15a
Hdlp leveling fuse 10a
Hvac control module
Ign 3 fuse 10a
Ign 3 relay
Left rear door module (lrdm)
Left rear fuse block (below left rear seat)
Memory seat module (msm)
Passenger front door module (pfdm)
Passenger heated seat module
Passenger power seat switch
R frt htd seat mod fuse 10a
R11
R12
R21
R22
R25
R33
R37
Rap relay
Rap relay coil control
Rear headlamp leveling sensor
Rear integration module (rim) (under package shelf trim pad)
Recirculation actuator
Red
Right front heated seat module
Right rear door module (rrdm)
Seat circuit breaker 30a
Shift control assembly
Spare fuse
Splice pack sp302 (in passenger compartment, on left frame rail, near left side of driver's seat)
Sun roof mod fuse 30a
Sunroof module (at rear of sun roof assembly, behind) headliner)
Tan
Trunk lamp fuse
W/ 8-way passenger seat power adjuster
W/o 8-way passenger seat power adjuster
W/sliding electric roof sun glass

Power Distribution Wiring Diagram (7 of 7) for Cadillac CTS 2003

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List of elements for Power Distribution Wiring Diagram (7 of 7) for Cadillac CTS 2003:

(in rear compartment, to rear of right rear shock tower) g401
A12
Canister vent fuse 10a
Defogger system
Evaporative emissions (evap) canister vent solenoid
From ignition switch (via splice pack sp201, pin 9) (diagram 4 of 7)
From right rear fuse block (rim fuse, 10a) (diagram 4 of 7)
Front passenger door module (fpdm)
Ign 1 relay
Inflatable restraint sensing & diagnostic module (sdm)
Inside rearview mirror
Int lamp relay
Interior lamp fuse 10a
Interior lights system
Nav fuse 10a
Not used
Pgsr dr mod fuse 10a
Pnk
R16
R17
R21
R22
R23
R25
R26
R27
Rear defog fuse 10a
Rear defog relay
Rear integration module (rim)
Right rear fuse block (below right rear seat)
Rim fuse 10a
Sir fuse 10a
Spare fuse
Spare relay
Splice pack sp302 (in passenger compartment, on left frame rail, near left side of driver's seat)
Traffic information receiver
Tv antenna module
W/avec system, am/fm radio, icdx navigation, cd-rom & tv
W/avec system, am/fm radio, mcd, dvd, navigation & tv

POWER DOOR LOCKS

Power Door Locks Wiring Diagram (1 of 2) for Cadillac CTS 2003

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List of elements for Power Door Locks Wiring Diagram (1 of 2) for Cadillac CTS 2003:

(in body harness, approximately 255 cm (100.5 in) from splice pack sp303 behind passenger's seat, near right rear fuse block)
(in passenger compartment, behind left kick pad) g200
(in passenger compartment, behind right kick pad) g201
115 cm (45.6 in) from c311)
A12
B10
B11
B12
Backlight lamps ctrl
Battery
Class 2 serial data
Computer data lines system
Door ajar signal
Door ajar sw signal
Door ajar switch signal
Door key sw unlock sig
Door key unlock switch signal
Door lock mtr lock ctrl
Door lock mtr unlk ctrl
Door lock sw lock sig
Door lock sw unlock sig
Door lock switch signal
Door open signal
Door open switch signal
Dr mod pwr cb 30a
Driver door latch assembly (at rear of left front door)
Driver door module (ddm) (on left front door, under door trim panel)
Driver door switch assembly (ddsa)
Driver dr key sw signal
Driver dr mod fuse 10a
Front passenger door module (fpdm) (on right front door, under door trim panel)
Gnd
Ground
Hot at all times
Interior lights system
Keyless entry antenna signal
Left front door sw sig
Left rear fuse block (below left rear seat)
Memory seat switch
Passenger door latch assembly (at rear of right front door)
Psgr dr mod fuse 10a
Radio antenna module (in rear of passenger compartment, above headliner near rear window)
Rear compartment lid release switch
Rear dr mod fuse 15a
Rear window glass
Rfa grid
Right rear fuse block (below right rear seat)
S303
S501 (or s502) (in left front door trim harness, approximately 70 cm (27.3 in) from driver window/door lock switch or driver door switch assembly (ddsa))
Tan
Trunk dr release fuse 10a

Power Door Locks Wiring Diagram (2 of 2) for Cadillac CTS 2003

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List of elements for Power Door Locks Wiring Diagram (2 of 2) for Cadillac CTS 2003:

(in left rear door trim harness, approximately 160 cm (62.9 in) from c701) s701
(in passenger compartment, behind left kick pad) g200
(in passenger compartment, behind right kick pad) g201
A12
Ajar
B10
B12
Backlight lamp ctrl
Backlight lamps control
Backlight lamps ctrl
Battery
Class 2 serial data
Computer data lines system
Door act lock ctrl
Door ajar switch signal
Door lock act lock ctrl
Door lock act unlk ctrl
Door lock unlock ctrl
Door open switch signal
Driver door lock switch
Ground
Interior lights system
Left rear door latch assembly (at rear of left rear door)
Left rear door module (lrdm) (on left rear door, under door trim panel)
Lock
Open
Passenger door lock switch
Passenger window switch
Right rear door latch assembly (at rear of right rear door)
Right rear door module (rrdm) (on right rear door, under door trim panel)
S601 (in right front door trim harness, approximately 70 cm (27.3 in) from front passenger window switch)
Tan
Unlock

POWER MIRRORS

Automatic Day/Night Mirror Wiring Diagram for Cadillac CTS 2003

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List of elements for Automatic Day/Night Mirror Wiring Diagram for Cadillac CTS 2003:

(in rear compartment to rear of left rear shock tower) g402
A12
Backup lamp voltage
Class 2 serial data
Computer data lines system
Ground
Hot at all times
Ignition voltage
Inside rearview mirror (isrvm) (in center front of passenger compartment, on windshield)
Left rear fuse block (under left side of rear seat)
Pnk
R36
R37
R38
R40
Rear integration module (rim) (in center rear of passenger compartment, under package shelf trim panel)
Rev lamp fuse 10a
Rev lamp relay
Reverse lamp ctrl
Right rear fuse block (under right side of rear seat)
Rim fuse 10a

Power Mirrors Wiring Diagram for Cadillac CTS 2003

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List of elements for Power Mirrors Wiring Diagram for Cadillac CTS 2003:

A12
B11
B12
Battery
Class 2 serial data
Computer data lines system
Down
Dr mod pwr c/b 30a
Driver door module (ddm) (on left front door, under door trim panel)
Driver door switch module (ddsm)
Driver dr mod fuse 10a
Driver side outside mirror
Front passenger door module (fpdm) (on right front door, under door trim panel)
G200 (in passenger compartment, behind left kick pad)
G201 (in passenger compartment, behind right kickpad)
Ground
Ground rtn
Horiz motor
Hot at all times
Left
Left mirror mtr-down
Left mirror mtr-left
Left mirror mtr-right
Left mirror mtr-up
Left rear fuse block (under left side of rear seat)
Logic
Mirror switches
Nca
Passenger outside mirror
Psgr dr mod fuse 10a
Right
Right mirror motor-up
Right mirror mtr -down
Right mirror mtr-left
Right mirror mtr-right
Right rear fuse block (under right side of rear seat)
S303 (in body harness, approximately 255 cm (100.5 in) from sp303)
S501 or s502 (in left front door trim harness, approximately, 70 cm (27.3 in) from ddsa or driver window/door lock switch)
Sel left
Sel right
Vert motor

POWER SEATS

Heated Seats Wiring Diagram for Cadillac CTS 2003

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List of elements for Heated Seats Wiring Diagram for Cadillac CTS 2003:

(in passenger compartment, to left of driver's seat, on left frame rail) g307
A11
A12
Battery
Class 2 serial data
Computer data lines system
Dash integration module (dim) (in passenger compartment, under right side of i/p above right closeout/insulator panel)
Driver cushion heated seat element
Driver heated seat status
Driver high/low signal
E10
Front passenger cushion heated seat element
Ground
Heated seat element control
Heated seat element voltage
Heated seat high/low signal
Heated seat module status sig
Heated seat module status signal
Heated seat sensor low ref
Heated seat temp sens signal
Heating element
Hot at all times
Hot in run
Hvac control module (includes heated seat switches)
Ign 3 fuse 10a
Ignition 3 voltage
Left front heated seat module (in passenger compartment, under driver's seat)
Left rear fuse block (in passenger compartment, under left side of rear seat)
Lt frt htd seat mod fuse 10a
Nca
Passenger high/low signal
Pnk
Radio
Rear integration module (rim) (in center rear of passenger compartment, under package shelf trim pad)
Right front heated seat module (in passenger compartment, under passenger's seat)
Right rear fuse block (in passenger compartment, under right side of rear seat)
Rt frt htd seat mod fuse 10a
Seat temp sensor low ref
Seat temp sensor signal
Splice pack sp303 (in passenger compartment, behind passenger's seat near right rear fuse block)
Thermistor

Power Seats Wiring Diagram for Cadillac CTS 2003

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List of elements for Power Seats Wiring Diagram for Cadillac CTS 2003:

(in passenger compartment, to left of driver's seat, on left frame rail) g307
Aft
Approximately 180 cm (70.8 in) from left rear fuse block) s305
Battery
Down
Driver seat adjust switch
Driver seat adjuster motor assembly
Driver seat front m vertical motor
Driver seat horizontal motor
Driver seat rear vertical motor
Driver seat recline motor
Front vertical down
Front vertical up
Fwd
Gnd
Horizontal forward
Horizontal rearward
Hot at all times
Left rear fuse block (in passenger compartment, under left side of rear seat)
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
Rear vertical down
Rear vertical up
Recline forward
Recline rearward
S304 (in body harness, approximately 555 cm (218.5 in) from c700)
Seats circuit breaker 30a
Tan

POWER TOP/SUNROOF

Sunroof Wiring Diagram for Cadillac CTS 2003

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List of elements for Sunroof Wiring Diagram for Cadillac CTS 2003:

1995 vftc c
G401 (in rear compartment, to rear of right rear shock tower)
Ground
Hall effect sensor 1
Hall effect sensor 2
Hot at all times
Illumination +
Illumination -
Interior lights system
Limit switch
Motor +
Motor -
Nca
Pnk
Rap relay
Rap relay coil ctrl
Rear integration module (rim) (in center rear of passenger compartment, under package shelf trim panel)
Right rear fuse block (in passenger compartment, under right side of rear seat)
S133
Solid state (close)
Solid state (open)
Sun roof motor (on left front corner of sunroof module)
Sunroof control module (in passenger compartment, behind headliner, at rear of sunroof assembly)
Sunroof control switch
Sunroof limit switch low reference
Sunroof limit switch stop signal
Sunroof mod fuse 30a
Sunroof motor close control
Sunroof motor open control
Sunroof obstruction sensor 5vref
Sunroof obstruction sensor signal
Sunroof switch low reference
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 switch-low reference
Tan
Vehicle speed signal

POWER WINDOWS

Power Windows Wiring Diagram (1 of 2) for Cadillac CTS 2003

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List of elements for Power Windows Wiring Diagram (1 of 2) for Cadillac CTS 2003:

(in body harness, approximately 255 cm (100.5 in) from sp303) s303
A12
B11
B12
Backlight lamp control
Backlight lamps ctrl
Backlights lamps ctrl
Battery
Class 2 serial data
Computer data lines system
Door locks system
Down
Dr mod pwr cb 30a
Driver door module (ddm) (on left front door, under door trim panel)
Driver door switch module (ddsm)
Driver dr mod fuse 10a
Driver window motor (in driver door assembly, behind water deflector)
Front passenger door module (fpdm) (on right front door, under door trim panel)
G200 (in passenger compartment, behind left kick pad)
G201 (in passenger compartment, behind right kick pad)
Ground
Hi speed communication
Hi speed communications
Hot at all times
Interior lights system
Left front down control
Left front up control
Left rear fuse block (under left side of rear seat)
Low reference
Nca
Normal speed comm
Normal speed communication
Normal speed communications
Passenger window motor (in front passenger door assembly, behind water deflector)
Passenger window switch
Pnk
Psgr dr mod fuse 10a
Rear dr mod fuse 15a
Right front down control
Right front down signal
Right front express signal
Right front pwr wdo dn sig
Right front pwr wdo express sig
Right front pwr wdo up sig sw
Right front up control
Right front up signal
Right rear fuse block (under right side of rear seat)
S501 (in left front door trim harness, approximately 70 cm (27.3 in) from driver window/ door lock switch)
S600 (or s601) (in right front door trim harness, approximately 70 cm (27.3 in) from front passenger window switch)

Power Windows Wiring Diagram (2 of 2) for Cadillac CTS 2003

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List of elements for Power Windows Wiring Diagram (2 of 2) for Cadillac CTS 2003:

(in left rear door trim harness, approximately 160 cm (62.9 in) from c701) s701
(in passenger compartment, behind left kick pad) g200
(in passenger compartment, behind right kick pad) g201
A12
B12
Backlight lamps ctrl
Battery
Class 2 serial data
Computer data lines system
Dim
Down
Express down
G200 (in passenger compartment, behind left kick pad)
Gnd
Ground
Left rear door module (lrdm) (on left rear door, under door trim panel)
Left rear window motor (on left rear door assembly, behind water deflector)
Left rear window switch
Pwr wdo left rear dn ctrl
Pwr wdo left rear exp signal
Pwr wdo left rear sw down
Pwr wdo left rear up ctrl
Pwr wdo left rear up signal
Pwr wdo mtr right rear down ctrl
Pwr wdo right rear dn signal
Pwr wdo right rear up ctrl
Pwr wdo right rear up signal
Pwr wdo sw right rear express sig
Right rear door module (rrdm) (on right rear door, under door trim panel)
Right rear window motor (in right rear door assembly, behind water deflector)
Right rear window switch

RADIO

Radio Wiring Diagram, Base (1 of 2) for Cadillac CTS 2003

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List of elements for Radio Wiring Diagram, Base (1 of 2) for Cadillac CTS 2003:

(in headliner harness, approximately 115 cm (45.6 in) from c311)
(in rear compartment, to rear of left rear shock tower) g402
Am/fm antenna signal
Amp fuse 30a
Antenna signal
Audio fuse 15a
Battery
Class 2 serial data
Coaxial cable
Computer data lines system
Drain
Fm composite signal
G308
Ground
Hot at all times
Hot in run or crank
Info down switch signal
Information up sw signal
Instrument cluster system
Joint connector
Left audio signal (+)
Left audio signal (-)
Left front door speaker (midrange)
Left front upper speaker (tweeter)
Left rear fuse block (in passenger compartment, under left side of rear seat)
Nca
Pnk
Radio
Radio antenna module (in passenger compartment, above headliner, near rear window)
Radio front glass antenna
Radio rear glass antenna
Rear speaker (subwoofer)
Red
Remote radio ctrl voltage
Return voice in signal
Right audio signal (+)
Right audio signal (-)
S10
S313
Steering wheel ctrls sig
Strg ctrls fuse 10a
Tan
Trunk dr release fuse 10a
Underhood fuse block (in engine compartment, in right front corner)
Vehicle speed signal
Voice in signal

Radio Wiring Diagram, Base (2 of 2) for Cadillac CTS 2003

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List of elements for Radio Wiring Diagram, Base (2 of 2) for Cadillac CTS 2003:

(in headliner harness, approximately 110 cm (39.8 in) from c311)
(in passenger compartment, behind left kick pad) g200
(in rear compartment to rear of left rear shock tower) g402
(midrange) left rear door speaker
(midrange) right front door speaker
(midrange) right rear door speaker
(tweeter) right front upper speaker
A10
A11
Audio amplifier (in left rear compartment, behind left strut tower)
B10
B11
B12
Battery
C203
C203 c3
Cellular telephone voice low ref
Cellular telephone voice signal
Class 2 serial data
Computer data lines system
Cruise control switch signal
Engine control module (ecm) (in engine compartment, in right front corner)
Fuse 2a
Ground
Inflatable restraint steering wheel module coil
Interior lights system
Left fnt low level audio sig (+)
Left fnt low level audio sig (-)
Left front midrange spkr out (+)
Left front midrange spkr out (-)
Left front tweeter spkr out (+)
Left front tweeter spkr out (-)
Left rear midrange spkr out (+)
Left rear midrange spkr out (-)
Left subwoofer spkr out (+)
Left subwoofer spkr out (-)
Low ref
Mic out
Mic out rtn
Mic out shield
Nca
On/ off
Pnk
R/a
Rdt1
Rdt2
Right fnt low level audio sig (+)
Right fnt low level audio sig (-)
Right fnt midrange spkr out (+)
Right fnt midrange spkr out (-)
Right front tweeter spkr out (+)
Right front tweeter spkr out (-)
Right rear midrange spkr out (+)
Right rear midrange spkr out (-)
Right subwoofer spkr out (+)
Right subwoofer spkr out (-)
S/c
S119
S312
S318
Splice pack sp203 (in passenger compartment, under left side of i/p trim pad)
Steering wheel control pad
Steering wheels controls-center
Steering wheels controls-left
Steering wheels controls-right
Sw1 ent
Sw2 back
Sw3
Sw4
Sw5
Sw6
Tan
Vehicle communication interface module (vcim) (in rear compartment, behind right strut tower)
Voice signal

Radio Wiring Diagram, Luxury (1 of 2) for Cadillac CTS 2003

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List of elements for Radio Wiring Diagram, Luxury (1 of 2) for Cadillac CTS 2003:

(in headliner harness, approximately 115 cm (45.6 in) from c311)
(in rear compartment, to rear of left rear shock tower) g402
Am/fm antenna signal
Amp fuse 30a
Antenna signal
Audio common
Audio fuse 15a
Battery
Class 2 serial data
Coaxial cable
Computer data lines system
Digital radio antenna
Digital radio receiver
Drain
Drain wire
Fm composite signal
G308
Ground
Hot at all times
Hot in run or crank
Info down switch signal
Information up sw signal
Instrument cluster system
Joint connector
Left audio signal (+)
Left audio signal (-)
Left rear fuse block (in passenger compartment, under left side of rear seat)
Nca
Noise compensation microphone
Pnk
Radio
Radio antenna module (in rear of passenger compartment, above headliner, near rear window)
Radio front glass antenna
Radio rear glass antenna
Red
Remote radio ctrl voltage
Return voice in signal
Right audio signal (+)
Right audio signal (-)
Right front door speaker (tweeter)
Right front upper speaker (tweeter)
S10
S11
S313
Satellite antenna
Satellite antenna signal
Splice pack sp301 (in passenger compartment, on right frame rail, near right side of passenger's seat)
Steering wheel ctrls sig
Strg ctrls fuse 10a
Tan
Terrestrial antenna
Terrestrial antenna signal
Trunk dr release fuse 10a
Underhood fuse block (in engine compartment, in right front corner)
Vehicle speed signal
Voice in signal
Voice output (+)
Voice output (-)
Voice output ground

Radio Wiring Diagram, Luxury (2 of 2) for Cadillac CTS 2003

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List of elements for Radio Wiring Diagram, Luxury (2 of 2) for Cadillac CTS 2003:

(in headliner harness, approximately 110 cm (39.8 in) from c311)
(in passenger compartment, behind left kick pad) g200
(in passenger compartment, on left frame rail, near left side of driver's seat) splice pack sp300
(in rear compartment to rear of left rear shock tower) g402
(midrange) left rear door speaker
(subwoofer) rear speaker
A10
A11
A12
Audio amplifier (in left rear compartment, behind left strut tower)
B10
B11
B12
Battery
C203
C203 c3
Cellular telephone voice low ref
Cellular telephone voice signal
Class 2 serial data
Computer data lines system
Cruise control switch signal
Drain wire
Engine control module (ecm) (in engine compartment, in right front corner)
Front center speaker out (+)
Front center speaker out (-)
Front speaker (mid- range)
Fuse 2a
Ground
Inflatable restraint steering wheel module coil
Interior lights system
Left front door speaker (tweeter)
Left front low level signal (+)
Left front low level signal (-)
Left front tweeter spkr out (+)
Left front tweeter spkr out (-)
Left front upper speaker (tweeter)
Left rear midrange spkr out (+)
Left rear midrange spkr out (-)
Low ref
Mic out
Mic out rtn
Mic out shield
Navigation voice in (+)
Navigation voice out (-)
Nca
Noise compensation micro voltage
On/ off
Pnk
R/a
Rdt1
Rdt2
Right front low level signal (+)
Right front low level signal (-)
Right front tweeter spkr out (+)
Right front tweeter spkr out (-)
Right rear door speaker (midrange)
Right rear midrange spkr out (-)
S/c
S119
S312
S318
Splice pack sp203 (in passenger compartment, under left side of i/p trim pad)
Steering wheel control pad
Steering wheels controls-center
Steering wheels controls-left
Steering wheels controls-right
Subwoofer spkr out (+)
Subwoofer spkr out (-)
Sw1 ent
Sw2 back
Sw3
Sw4
Sw5
Sw6
Tan
Vehicle communication interface module (vcim) (in rear compartment, behind right strut tower)
Voice signal

SHIFT INTERLOCK

Ignition Lock Solenoid Wiring Diagram for Cadillac CTS 2003

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List of elements for Ignition Lock Solenoid Wiring Diagram for Cadillac CTS 2003:

A11
A12
Automatic transmission shift lock actuator
Class 2 serial data
Computer data lines system
Dash integration module (dim) (under right side of dash, above right closeout/insulator panel)
Hot at all times
Ignition lock cyl ctrl
Ignition lock cylinder control actuator
Right rear fuse block (under right side of rear seat)
Rim fuse 10a
Tan

Shift Interlock Wiring Diagram for Cadillac CTS 2003

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List of elements for Shift Interlock Wiring Diagram for Cadillac CTS 2003:

(in rear compartment to rear of left rear shock tower) g402
A/t shift lock control solenoid
A12
Class 2 serial data
Computer data lines system
Hot at all times
Hot in run
Ign 3 fuse 10a
Ign 3 relay
Left rear fuse block (under left side of rear seat)
R21
R22
R23
R25
Rear integration module (rim) (in center rear of passenger compartment, under package shelf trim panel)
Shift control assembly (in center console)
Shift lock solenoid control

STARTING/CHARGING

Charging Wiring Diagram for Cadillac CTS 2003

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List of elements for Charging Wiring Diagram for Cadillac CTS 2003:

(in engine compartment, on engine block, near generator) g102
(in right side of engine compartment, on inner fender wall, near battery) g105
Battery
Battery (charge) indicator
Class 2 ecm
Class 2 serial data
Computer data lines system
Electronic brake control module (ebcm) (at right front corner of engine compartment)
Engine control module (ecm) (at right front corner of engine compartment)
Gen f term
Gen l term
Generator
Ground distribution system
Ign
Instrument panel cluster (ipc)
Logic
Power distribution system
Red
Serial data class 2
Splice pack sp200 (in right front of passenger compartment, under dash above steering column)
Starter

Starting Wiring Diagram for Cadillac CTS 2003

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List of elements for Starting Wiring Diagram for Cadillac CTS 2003:

(in engine compartment on engine block, near generator) g102
(in right side of engine compartment, on inner fender wall, near battery) g105
(on right front corner of vehicle, on right body rail near right headlamp) g104
A/t
Accessory
Battery
Clutch pedal position (cpp) sensor (m/t only) (in passenger compartment, under i/p on clutch pedal)
Computer data lines system
Cpp switch signal
Crank
Crank voltage
Engine control module (ecm) (in right front corner of engine compartment)
Ground distribution system
Hot at all times
Hot in run
Htr vlv/ cltch fuse 10a
Ign 1 relay
Ignition switch
M/t
Off/lock
Pnk
R43
R44
R45
R46
R63
R64
R65
R66
Red
Run
Serial data
Splice pack sp200 (in right front of passenger compartment, under i/p above steering column)
Starter
Starter fuse 30a
Starter relay
Starter relay coil ctrl
Starter relay coil voltage
Starting/ charging system (charging circuit)
Underhood fuse block (in right front corner of engine compartment)

SUPPLEMENTAL RESTRAINTS

Supplemental Restraints Wiring Diagram (1 of 2) for Cadillac CTS 2003

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List of elements for Supplemental Restraints Wiring Diagram (1 of 2) for Cadillac CTS 2003:

(at left side of dash, near base of "b" pillar) left inflatable restraint side impact sensor
(at right side of dash, near base of "b" pillar) right inflatable restraint side impact sensor
(in left front seat belt buckle) left seat belt switch
(in seat)
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A23
A24
A25
A26
A27
A28
A29
A30
A31
A32
A33
A34
A35
A36
A37
A38
A39
A40
A41
A42
Case ground
Computer data lines system
G306 (in passenger compartment, under center console)
Ground
High control
Hot in run or crank
Ignition 1 voltage
Inflatable restraint sensing & diagnostic module (sdm) (at center of passenger compartment floor, under console)
Inflatable restraint steering wheel module (on steering wheel)
Inflatable restraint steering wheel module coil
Left inflatable restraint roof rail module (above left "b" pillar)
Left inflatable restraint side impact module (on left side of left front seat)
Left seat belt pretensioner
Left seat belt switch
Low control
Low reference
Nca
Pnk
Right inflatable restraint side impact module (on right side of left front seat)
Right rear fuse block (below right rear seat)
Sensor signal
Sensor voltage
Serial data
Shorting bar
Shorting clip
Sir fuse 10a
Stage 1
Stage 2
Tan

Supplemental Restraints Wiring Diagram (2 of 2) for Cadillac CTS 2003

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List of elements for Supplemental Restraints Wiring Diagram (2 of 2) for Cadillac CTS 2003:

Air bag indicator
Class 2 (sdm)
Computer data lines system
Data link connector (dlc) (under left side of dash)
Ign
Inflatable restraint front end sensor (on upper radiator support)
Inflatable restraint i/p module
Instrument panel cluster (ipc)
Nca
Right inflatable restraint roof rail module (above right "b" pillar)
Right seat belt pretensioner
Serial data
Shorting bar
Shorting clip
Splice pack sp201 (in passenger compartment, behind ignition switch, near hvac module)
Splice pack sp300 (in passenger compartment, on left frame rail, near left side of driver's seat)
Stage 1
Stage 2
Underhood fuse block (at left front of engine compartment)

TRANSMISSION

3.2L VIN N

3.2L VIN N, A/T Wiring Diagram for Cadillac CTS 2003

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List of elements for 3.2L VIN N, A/T Wiring Diagram for Cadillac CTS 2003:

(can) +
(can) -
(on eng block, near starter motor)
1-2 shift sol
1-2 shift sol vlv
2-3 shift sol
2-3 shift sol vlv
4-5 shift sol
4-5 shift sol vlv
A/t iss hi sig
A/t iss lo sig
Acc volt
Battery
Data link connector (dlc) (partial) (under left side of dash)
Ecm/tcm fuse 10a
Engine control module (ecm) (at right front corner of engine compt)
G100
G100 (on eng block, near starter motor)
G104 (near right head- lamp)
Ground
Hot at all times
Hot in run or start
Ign 1 relay
Ign volt
Oss sens high
Oss sens low
P/n
P/n sig
Pc sol vlv hi ctrl
Pc sol vlv lo ctrl
Pnk
Pressure control solenoid
R43
R44
R45
R46
Red
S114 (in engine harn, approximately 160 cm from ecm ground)
S118 (in body harn, approximately 235 cm from knock sensor 1 connector)
Ser data
Ser data (can) +
Ser data (can) -
Serial data
Sol pwr feed
Tcc brake sw sig
Tcc sol valve
Tcc sol vlv ctrl
Tcc sw
Tcc/ cruise release switch
Tcc/et fuse 10a
Tcm/ ipc fuse 15a
Tft sens lo ref
Tft sens sig
Theft fuse 7.5a
Transmission
Transmission control module (tcm) (at right front side of engine compt)
Transmission fluid temperature sensor
Transmission input shaft speed sensor
Transmission manual shift shaft switch assembly
Transmission output shaft speed sensor
Trs sig a
Trs sig b
Trs sig c
Trs sig p
Under- hood fuse block (left front of eng compt)

3.2L VIN N, M/T Wiring Diagram for Cadillac CTS 2003

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List of elements for 3.2L VIN N, M/T Wiring Diagram for Cadillac CTS 2003:

(in front of under- hood fuse block)
(under dash, above steering column) sp200
Ccp switch
Class 2 data
Clutch pedal position switch (on clutch pedal bracket)
Computer data lines system
Engine control module (ecm) (at right front corner of engine compt)
G100 (on eng block, near starter motor)
G104 (near right head lamp)
Hot at all times
Hot in run or start
Htr/vlv clutch fuse 10a
Ign 1 relay
Main relay
Pnk
Pre fuse 10a
R43
R44
R45
R46
R48
R49
R63
R64
R65
R66
Rear integration module (rim) (under package shelf trim panel)
Rev sw sig
Reverse switch
Sp102
Start rly ctrl
Start rly volt
Starter fuse 30a
Starter relay
Starting/ charging system
Under- hood fuse block (left front of eng compt)
Vehicle speed sensor (near rear of trans- mission assembly)
Vss sig

TRUNK, TAILGATE, FUEL DOOR

Trunk Release Wiring Diagram for Cadillac CTS 2003

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List of elements for Trunk Release Wiring Diagram for Cadillac CTS 2003:

(in rear compartment, to rear of left rear shock tower) g402
A12
Computer data lines system
Driver door module (ddm) (on left front door, under door trim panel)
Driver door switch assembly (ddsa)
Gnd
Ground
Hot at all times
Interior lights system
Left rear fuse block (under left side of rear seat)
R31
R32
R33
R35
Rear compartment lid release actuator (part of lid release actuator)
Rear compartment lid release switch
Rear integration module (rim) (in center rear of passenger compartment, under package shelf trim panel)
Relay ctrl
Release switch
S317
S602
Serial data
Switch signal
Tan
Trk dr rel sol relay
Trunk ajar switch signal
Trunk release fuse 10a

WARNING SYSTEMS

Warning Systems Wiring Diagram (1 of 2) for Cadillac CTS 2003

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List of elements for Warning Systems Wiring Diagram (1 of 2) for Cadillac CTS 2003:

(in engine compartment, near left front strut tower, at bottom of inside fender well) g101
(in passenger compartment, behind left kick pad) g200
2.7 ohms
A11
A12
Accessory
Accessory voltage
Auto
B10
B12
Battery
Brake fluid level switch (at rear of engine compartment, on brake fluid reservoir)
Brake indicator
Class 2 (dim)
Class 2 (sdm)
Class 2 serial data
Computer data lines system
Crank
Dash integration module (dim) under right side of dash, above right closeout/insulator panel)
Dim/ aldl fuse 10a
Door ajar signal
Door ajar sw signal
Door key unlock switch signal
Door open signal
Driver door latch assembly (at rear of left front door)
Driver door module (ddm) (on left front door, under door trim panel)
Driver dr key sw signal
Fasten safety belt indicator
G200 (in passenger compartment, behind left kick pad)
G201 (in passenger compartment, behind right kick pad)
Gnd
Ground
Ground distribution system
Hdlp
Headlamp switch
Headlamp switch on signal
Hot at all times
Ignition 1 voltage
Ignition switch
Instrument panel cluster (ipc)
Key in
Key in ignition switch
Key in ignition switch signal
Left front door sw sig
Lights on indicator
Logic
Off
Off/lock
Ohms
Park brake switch (on park brake assembly)
Park brake switch signal
Parklamp switch on signal
Pnk
Run
S119
S121
Splice pack sp200 (under dash, above steering column)
Splice pack sp201 (behind ignition switch, near hvac module)
Splice pack sp201 (in passenger compartment, behind ignition switch, near hvac module)
Splice pack sp203 (in passenger compartment, under left side of dash trim pad)
Tan
Underhood fuse block (in right front corner of engine compartment)
Voltage check fuse 10a

Warning Systems Wiring Diagram (2 of 2) for Cadillac CTS 2003

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List of elements for Warning Systems Wiring Diagram (2 of 2) for Cadillac CTS 2003:

(in engine compartment, near left front strut tower at bottom of inside fender well) g101
(in engine harness, aproximately 120 cm from ho2s bank 2 sensor 1)
A11
A22
A23
Audio amplifier (in left rear compartment, behind left strut tower)
B11
Base
Bose
Class 2 serial data
Computer data lines system
Coolant level sw
Coolant level switch (in left front corner of coolant surge tank)
Data link connector (dlc) (partial) (in passenger compartment, under dash next to hood release lever)
E10
E11
Ect sensor signal
Engine control module (ecm) (at right front corner of engine compartment)
Engine coolant temperature (ect) sensor (on top rear of intake manifold)
Fuel level sensor
Fuel pump & sensor assembly (in fuel tank)
Hvac control module (on center of dash, below radio)
Inflatable restraint sensing & diagnostic module (sdm) (at center of passenger compartment floor, under console)
Left front seat belt switch (in left front seat belt buckle)
Left seat belt sw signal
Low reference
Nca
Note: radio generates audio warnings through left front speaker. audio warning chimes are used for: fasten safety belt, key in ignition, lights on warning, park brake warning, hot coolant temperature & low fuel
Pnk
Radio
S111
S400 (in rear compartment lid harness, approximately 237 cm from c401)
Secondary fuel sender assembly (under vehicle, in fuel tank)
Splice pack sp201 (behind ignition switch, near hvac module)
Splice pack sp300 (in passenger compartment, on left frame rail, near left side of driver's seat)
Splice pack sp303 (behind passenger's seat, near right rear fuse block)
Tan

WIPER/WASHER

Wiper/Washer Wiring Diagram, Early Production for Cadillac CTS 2003

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List of elements for Wiper/Washer Wiring Diagram, Early Production for Cadillac CTS 2003:

(in engine compartment, near left front strut tower, at bottom of inside fenderwell) g101
(not used)
120,000 ohms
24,000 ohms
30,000 ohms
410,000 ohms
43,000 ohms
60,000 ohms
Accy voltage
B10
B11
B12
C202
Dash integration module (dim) (under right side of dash, above right closeout/ insulator panel)
Delay
Ground
Hdlp wash cb 30a
Headlamp washer fluid pump (w/ce4) (inside washer reservoir)
Headlamp washer gnd
Headlamp washer relay (in underhood bel assembly, near right front corner, under fuse block)
Hot at all times
Hot in accy or run
If equipped
Int
Jumper wire
Layer 1
Layer 2
Layer 3
Lo d5
Logic
Mist
Nca
Off
Off d1
R67
R68
Splice pack sp200 (in right front of passenger compartment, under dash, above steering column)
Tan
Underhood fuse block (in right front corner of engine compartment)
Wash
Washer fluid level signal
Washer pump ctrl
Washer switch
Washer switch signal
Windshield washer fluid level switch
Windshield washer fluid pump (near base of washer fluid reservoir)
Windshield wiper/washer module (on left rear of engine compartment, near windshield)
Windshield wiper/washer switch
Wiper mod fuse 30a
Wiper mtr high speed
Wiper sw fuse 10a
Wiper sw on signal
Wiper sw signal 1
Wiper sw signal 2
Wiper switch

Wiper/Washer Wiring Diagram, Late Production for Cadillac CTS 2003

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List of elements for Wiper/Washer Wiring Diagram, Late Production for Cadillac CTS 2003:

(in engine compartment, near left front strut tower, at bottom of inside fenderwell) g101
(not used)
120,000 ohms
24,000 ohms
30,000 ohms
410,000 ohms
43,000 ohms
60,000 ohms
Accy voltage
B10
B11
B12
C202
Dash integration module (dim) (under right side of dash, above right closeout/ insulator panel)
Delay
Ground
Hdlp wshr module circuit breaker 30a
Hdlp wshr relay
Headlamp washer fluid pump (inside washer reservoir)
Headlamp washer gnd
Hot at all times
Hot in accy or run
Int
Layer 1
Layer 2
Layer 3
Lo d5
Mist
Nca
Off
Off d1
R67
R68
R69
R70
R71
Solid state timer relay
Splice pack sp200 (in right front of passenger compartment, under dash, above steering column)
Tan
Underhood fuse block (in right front corner of engine compartment)
Wash
Washer fluid level signal
Washer pump ctrl
Washer switch
Washer switch signal
Windshield washer fluid level switch
Windshield washer fluid pump (near base of washer fluid reservoir)
Windshield wiper/washer module (on left rear of engine compartment, near windshield)
Windshield wiper/washer switch
Wiper mod fuse 30a
Wiper mtr high speed
Wiper sw fuse 10a
Wiper sw on signal
Wiper sw signal 1
Wiper sw signal 2
Wiper switch