All Wiring Diagrams for Buick LeSabre Custom 2003 model

AIR CONDITIONING

Automatic A/C Wiring Diagram (1 of 2) for Buick LeSabre Custom 2003

List of elements for Automatic A/C Wiring Diagram (1 of 2) for Buick LeSabre Custom 2003:

(hvac harn, 23.5 cm from c204 breakout)
(hvac harn, 30 cm from c204 breakout) s221
(hvac harn, 36.5 cm from c204 break- out)
(i/p harn, 13 cm from sunload sensor assembly breakout)
(i/p harn, 13.5 cm from hvac breakout)
(i/p harn, 6.5 cm from sunload sensor assembly breakout)
(i/p harn, 6.5 cm outside from radio breakout)
(on right front door pillar)
5v ref
A10
A11
A12
Air temperature actuator (left) (on left side of hvac module)
Air temperature actuator (right) (on right side of hvac module)
Air temperature sensor (inside) (on dash, right of steering column)
Air temperature sensor (lower left) (behind left dash air discharge vent)
Air temperature sensor (lower right) (behind right dash air discharge vent)
Air temperature sensor (outside) (on hood latch support)
Air temperature sensor (upper left) (behind left dash air discharge vent)
Air temperature sensor (upper right) (behind right dash air discharge vent)
Amb air temp sig
Amb light sens
Backlight lamps ctrl
Battery
Blwr sp ctrl
C1 a1
C11
C12
C13
C3 a7
C3 d12
Class 2 serial
Clock sig
Computer data lines system
D11
D16
Driver solar sig
G100 (left side of engine)
G201
Grd
Ground
Hot at all times
Hot in on
Hvac (batt) fuse 37 10a
Hvac blo fuse 2 30a
Hvac control module
Hvac fuse 33 10a
Ign 3 fuse 34 10a
Ign 3 volt
In air temp sig
Instrument panel integration module (ipm) (behind left side of dash)
Interior lights system
Lft air door sig
Lft temp dr ctrl
Low ref
Lower lft temp sig
Lower rt temp sig
Mod sig
Mode actuator (on left side of hvac module)
Mode door ctrl
Mode dr pos sens
Pass mdl fuse 25 10a
Pass solar sig
Rear fuse block (under left rear seat)
Recirc door ctrl
Recirc door sig
Recirculation actuator (under right side of dash, right of blower motor)
Rt air door sig
Rt temp dr ctrl
S204
S205
S208
S222
S253
Solid state
Splice pack sp100
Splice pack sp201
Sunload sensor assembly (on top center of dash)
Tan
Upper lh temp sig
Upper rt temp sig

Automatic A/C Wiring Diagram (2 of 2) for Buick LeSabre Custom 2003

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List of elements for Automatic A/C Wiring Diagram (2 of 2) for Buick LeSabre Custom 2003:

(engine harn, 6.5 cm from iac valve breakout)
5v ref
A/c clu fuse 26 15a
A/c clu relay 32
A/c compressor clutch
A/c compressor clutch diode
A/c refrigerant pressure sensor (behind a/c compressor, on a/c line)
A10
A11
A12
B10
B11
Bat
Battery
Blower control processor (at right front side of blower motor)
Blower motor (under right side of dash, above sound insulator)
Blwr mtr grd
Blwr sp input
Blwr volt
C10
C11
Class 2 serial
Clutch rly ctrl
Cntl sig
Computer data lines system
Cool fan 1 fuse 30a
Cool fan 2 fuse 46 30a
Coolfan 1 (low speed) relay 40
Coolfan 2 (high speed) relay 37
Coolfan s/p relay 39
D10
Dash integration module (dim) (behind right side of dash, under sound insulator)
E10
E11
Ect sens grd
Ect sens sig
Engine controls system
Engine coolant temperature sensor (on rear of
Engine, near thermostat housing)
F11
Front passenger door module (fpdm)
G10
G100 (left side of engine)
G103 (on inner body panel)
G11
G201 (on right front door pillar)
Grd
Ground
High spd fan ctrl
Hot at all times
Hot in on
Inflatable restraint steering wheel module coil
Interior lights system
Left cooling fan
Low spd fan ctrl
Passenger temperature control assembly
Pdm low side input
Pnk
Powertrain control module (pcm) (in air cleaner housing)
Right cooling fan
Right side steering wheel controls
S106
S602 (right front door harn, 10 cm from door module connector breakout)
Sensor grd
Sensor signal
Sound systems
Speed cntl
Splice pack sp100
Splice pack sp103
Splice pack sp201
Steering column fuse holder
Sw grd
Sw1
Sw2
Sw3
Sw4
Switch fuse 2a
T10
T11
Tan
Underhood fuse block (right front side of engine compt)
V10
V11

Compressor Wiring Diagram for Buick LeSabre Custom 2003

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List of elements for Compressor Wiring Diagram for Buick LeSabre Custom 2003:

(engine harn, 6.5 cm from iac valve breakout)
(in engine harn, 18 cm from a/c compressor clutch connector breakout) s108
5v ref
A/c clu fuse 26 15a
A/c clu relay
A/c compressor clutch
A/c compressor clutch diode (near a/c compressor)
A/c refrigerant pressure sensor (behind a/c compressor, on a/c line)
Class 2 serial
Clutch rly ctrl
Computer data lines system
Engine controls system
G100 (left side of engine)
Hot at all times
Hot in on
Low ref
Powertrain control module (pcm) (in air cleaner housing)
S106
Sensor signal
Splice pack sp100
T10
T11
Underhood fuse block (right front side of engine compartment)
V10
V11

Manual A/C Wiring Diagram (1 of 2) for Buick LeSabre Custom 2003

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List of elements for Manual A/C Wiring Diagram (1 of 2) for Buick LeSabre Custom 2003:

(hvac harn, 30 cm from c204 breakout) s221
(i/p harn, 6.5 cm outside from radio breakout)
5v ref
A10
A11
A12
A13
A14
A15
A16
Air temp dr ctrl
Air temperature actuator (left front side of blower motor)
Ambient light
Anti-lock brakes system
B10
B11
B12
B13
B14
B15
B16
Backlight ctrl
Batt
Battery
Blower control module (under right side of dash, above blower motor)
Blower motor (under right side of dash, above sound insulator)
Blwr mtr grd
Blwr sp input
Blwr speed cntrl
Blwr volt
C1 a10
Class 2 serial
Computer data lines system
D12
Dimmer sw sig
G200 (on left front door pillar)
G201 (on right front door pillar)
Grd
Headlights system
Hot at all times
Hot in on
Hvac batt fuse 37 10a
Hvac blo fuse 2 30a
Hvac control module
Hvac fuse 33 10a
Ign 3 voltage
Int lamp sw sig
Interior lights system
Key reminder sw
Low ref
Mode actuator (left side of hvac assembly)
Motor low ref
Rear fuse block (under left rear seat)
Recirc dr mtr
Recirculation actuator (under right side of dash, to right of blower motor)
S208 (i/p harn, 13 cm from sunload sensor assembly breakout)
S222 (hvac harn, 23.5 cm from c204 breakout)
S253
Solid state
Speed cntl
Splice pack sp200
Splice pack sp201
Trac cntrl sw
Twilight sentinel
Warnings system

Manual A/C Wiring Diagram (2 of 2) for Buick LeSabre Custom 2003

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List of elements for Manual A/C Wiring Diagram (2 of 2) for Buick LeSabre Custom 2003:

(engine harn, 6.5 cm from iac valve breakout)
(in engine harn, 18 cm from a/c clutch connector breakout) s108
5v ref
A/c clu fuse 26 15a
A/c clu relay 32
A/c compressor clutch
A/c compressor clutch diode (near a/c compressor)
A/c refrigerant pressure sensor (behind a/c compressor, on a/c line)
A10
A11
B10
B11
C10
C11
Class 2 serial
Clutch rly ctrl
Computer data lines system
Cool fan 1 fuse 47 30a
Cool fan 2 fuse 46 30a
Coolfan 1 (low speed) relay 40
Coolfan 2 (high speed) relay 37
Coolfan s/p relay 39
D10
E10
E11
Ect sens grd
Ect sens sig
Engine controls system
Engine coolant temperature (ect) sensor (on rear of
Engine, near thermostat housing)
F11
G10
G100 (left side of engine)
G103 (on inner body panel)
G11
High spd fan ctrl
Hot at all times
Hot in on
Left cooling fan motor
Low ref
Low spd fan ctrl
Powertrain control module (pcm) (in air cleaner housing)
Right cooling fan motor
S106
Sensor signal
Splice pack sp100
Splice pack sp103
T10
T11
Underhood fuse block (right front side of engine compartment)
V10
V11

ANTI-LOCK BRAKES

Anti-lock Brakes Wiring Diagram for Buick LeSabre Custom 2003

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List of elements for Anti-lock Brakes Wiring Diagram for Buick LeSabre Custom 2003:

(body harn, 18 cm from g300 breakout)
(body harn, 31.5 cm from g300 breakout)
(in eng harn, 12.5 cm from right front wheel speed sensor breakout) s101
(in eng harn, 19 cm from right front wheel speed sensor breakout)
(in eng harn, 49 cm from left front wheel speed sensor breakout)
(on left front door pillar)
(on top of transmission)
A1 c2
A14
A15
Abs fuse 10a
Abs fuse 50a
Abs ind lamp
Abs ind sig
Abs indicator
B c4
Base model
Battery
Brake pressure modulator valve
C1 c8
C11
C12 c1
C3 f1
Computer data lines system
Delivered torque output
Driver information center (dic)
Electronic brake control module (ebcm) (on left front of engine compartment)
G104
G200
Ground-module
Ground-pump motor
Heater & a/c control
Hot at all times
Hot in run
Ignition
Instrument panel cluster
Instrument panel module (ipm)
Lateral accelerometer
Lateral accelerometer sensor (under left rear seat)
Left front wheel speed sensor
Left rear wheel speed sensor
Lf wheel spd sens-ret
Lf wheel spd sens-sig
Lr wheel spd sens-ret
Lr wheel spd sens-sig
Nca
Powertrain control module (pcm) (in air cleaner housing)
Pump motor
Rear fuse block (under left rear seat)
Red
Requested torque input
Rf wheel spd sens-ret
Rf wheel spd sens-sig
Right front wheel speed sensor
Right rear wheel speed sensor
Rr wheel spd sens-ret
Rr wheel spd sens-sig
S102
S103
S104 (in eng harn, 42.5 cm from left front wheel speed sensor breakout)
S226
S303
S305
Sens feed-5v
Sensor ret
Serial data class 2
Sp304
Splice pack sp200
Steering wheel pos
Steering wheel position sensor (swps) (on base of steering column)
Stop lamp switch (on brake pedal bracket)
Stop lp fuse 15a
Stoplight sw
Tan
Torque delivered
Torque desired
Trac ctrl sw
Traction control switch
Traction control system active
Traction off indicator
Underhood fuse block (right front side of engine compt)
Uplevel model
Var effort steering
Variable effort steering actuator (on left side of power steering gear)
Vent tube
Yaw rate sens
Yaw rate sensor (under rear shelf, behind lid hinge)

ANTI-THEFT

Forced Entry Wiring Diagram for Buick LeSabre Custom 2003

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List of elements for Forced Entry Wiring Diagram for Buick LeSabre Custom 2003:

A11
A12
Class 2 serial data
Computer data lines system
Dash integration module (behind right side of dash, under sound insulator)
Door open
Door open input
Driver door lock actuator
Driver door module
Drv mdl fuse 7 10a
Exterior lights system
Front passenger door lock actuator
Front passenger door module
Ground
Horn ctrl
Horns system
Hot at all times
Key cylinder disarm/ unlock
Left rear door lock actuator
Left rear door module
Lf door key sw sig
Lf door open in
Lights ctrl
Pass mdl fuse 25 10a
Pwr door serial data
Rear fuse block
Right rear door lock actuator
Right rear door module
Rrdr mdl fuse 18 10a
S302 (body harn, near left power seat breakout)
S602
Serial data class 2
Tan

Pass-Key Wiring Diagram for Buick LeSabre Custom 2003

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List of elements for Pass-Key Wiring Diagram for Buick LeSabre Custom 2003:

A11
A12
B (+)
Computer data lines system
Dash integration module (behind right side of dash, under sound insulator)
Drivers door module (inside drivers door)
E9 c1
Exterior lights system
G200 (on left front door pillar)
Gnd
Horn ctrl
Horns system
Hot at all times
Ign sw fuse 29 15a
Ignition key
Ignition switch
Instrument panel cluster
Lights ctrl
Pcm batt fuse 8 10a
Powertrain control module (in air cleaner housing)
Reader/ exciter
Rear fuse block
S212
S217
S226
Serial data class 2
Serial data class 2 ign
Splice pack sp200
Theft deterrent control module (right side of steering column)
Transponder
Underhood fuse block

BODY CONTROL MODULES

Dash Integration Module Wiring Diagram for Buick LeSabre Custom 2003

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List of elements for Dash Integration Module Wiring Diagram for Buick LeSabre Custom 2003:

(under right side of rear seat) g305
A10
A11
A12
Acc
Accessory voltage
B10
B11
B12
Backlight lamps control
Battery
Battery positive voltage
Class 2 serial data
Computer data lines system
Control power
Dash integration module (dim) (behind right side of dash, under sound insulator)
Dim fuse 10a
Drl rly ctrl
E11
Exterior lights system
Flash to pass in
Flash to pass sw sup volt
G200 (on left front door pillar)
Ground
Headlamp hi beam rly ctrl
Headlamp on sig
Headlamps/wipers sig
Headlights system
Horn rly ctrl
Horns system
Hot at all times
Ign sw fuse 15a
Ignition 3 voltage
Ignition positive voltage
Ignition switch
Interior lights system
Ip lamp fuse sup voltage
Lock
Off/run/crank voltage
Park lamp rly ctrl
Parklamp sw on sig
Pnk
Power distribution system
Rear fuse block (under left rear seat)
Remote radio ctrl head
Run
S212
Sound systems
Splice pack sp200
Start
Steering wheel ctrl sig
Underhood fuse block (right front side of eng compt)
Unlock
Wiper/washer system

Instrument Panel Integration Module Wiring Diagram for Buick LeSabre Custom 2003

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List of elements for Instrument Panel Integration Module Wiring Diagram for Buick LeSabre Custom 2003:

5 volt ref
A/c upr lt air temp sen sig
A/c upr rt air temp sen sig
A10
A11
A12
Air conditioning system
Air temp door ctrl
Air temp door pos sen sig
Ambient light sensor sig
Anti-lock brakes system
B10
B11
B12
Battery positive voltage
Blower speed ctrl sig
C10
C11
C12
C13
C14
C15
C16
Class 2 serial data signal
Computer data lines system
D10
D11
D12
D13
D14
D15
D16
Dr hvac control assbly sig
Dr hvac ctrl assbly clk sig
Driver solar sen sig
G201 (on right front door pillar)
G302 (under left side of rear seat)
Ground
Headlights system
Hot at all times
Hot in on
Hvac batt fuse 10a
Hvac fuse 10a
I/p lamps dimmer sw sig
Ign-3 relay
Ignition 3 voltage
Inside air temp sens sig
Instrument panel integration module (ipm) (behind left side of dash)
Interior lamps sw on sig
Interior lights system
Key in ignition sig
Low lt air temp sen sig
Low mode door pos sen sig
Low ref
Lower rt air temp sen sig
Mode door ctrl
Outside air temp sen sig
Passenger solar sen sig
Passr air temp door pos sig
Power distribution system
Rear fuse block (under left rear seat)
Recirculation door ctrl
Recirculation position sig
Right air temp door ctrl
S205
Splice pack sp302
Tan
Traction ctrl sw sig
Twilight sentinel delay sig
Warnings system

Rear Integration Module Wiring Diagram for Buick LeSabre Custom 2003

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List of elements for Rear Integration Module Wiring Diagram for Buick LeSabre Custom 2003:

A10
A11
A12
Alc exhaust sol ctrl
Alc position sensor 5v ref
Alc position sensor low ref
Alc position sensor sig
Alc rly coil suply voltage
B10
B11
B12
B4 rear compt release rly ctrl
Battery positive voltage
Cigar lighter rly ctrl
Class 2 serial data
Computer data lines system
Defogger system
Driver heated seat hi/lo sig
Electronic suspension system
Exterior lights system
G302 (under left side of rear seat)
G402 (on lower left corner of trunk)
Grd
Heated seat status sig
Hot at all times
Hot in run or start
Ign sw fuse 15a
Ign-1 fuse 10a
Ign-1 relay
Ignition 1 voltage
Inadvertant power input
Inadvertent power rly ctrl
Interior lamp ctrl
Interior lights system
Overhead courtesy lamp
Park brake rly ctrl
Passr heated seat hi/lo sig
Passr htd seat ctrl status
Pnk
Power distribution system
Power distribution system (cigar lighter)
Power distribution system (rap)
Rap rly ctrl
Rear compt ajar sw sig
Rear defogger rly ctrl
Rear fuse block (under left rear seat)
Rear integration module (rim) (behind upper left rear seat cushion)
Reverse lamp rly ctrl
Seats system
Shift interlock system
Splice pack sp302
Splice pack sp402
Tan
Trunk, tailgate, fuel doors system

COMPUTER DATA LINES

Computer Data Lines Wiring Diagram for Buick LeSabre Custom 2003

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List of elements for Computer Data Lines Wiring Diagram for Buick LeSabre Custom 2003:

A11
A12
A14
A15
Aldl fuse 10a
B12
D14
D15
Dash integration module (dim) (behind rightside of dash, under sound insulator)
Data class 2
Data link connector (under lower left side of dash)
Digital radio receiver
Driver door module
Electronic brake control module (on left front of engine compt)
G201 (on right front door pillar)
Head up display
Hot at all times
Hvac control module
Inflatable restraint sensing & diagnostic module (under rear of center console, mounted to floor pan)
Instrument panel cluster (ipc)
Instrument panel integration module (behind left side of dash)
Memory seat module (under driver's seat)
Powertrain control module (in air cleaner housing)
Radio
Rear fuse block
Rear integration module (rim) module (behind upper left rear seat cushion)
Remote control door lock receiver (rcdlr) (under rear package shelf)
S202 (ip harn, 24 cm from ipm breakout)
S203
S205
S217 (body harn, 24 cm from p100)
S308
S317 (left seat harn, under left front seat)
S345
Temperature control
Theft deterrent control module
Vehicle interface unit (viu) (behind right rear seat back)
W/ automatic temperature control
W/ head up display
W/ manual
W/ manual temperature control
W/ memory seats
W/ theft deterrent system
W/ theft deterrent systems, w/o memory seats
W/ theft w/ theft deterrent system, deterrent system, w/ memory seats w/ memory seats
W/ theft w/ theft deterrent system, deterrent system, w/o memory seats w/o memory seats
W/ vehicle interface unit
W/o head up display
W/o theft deterrent system
W/o vehicle interface unit

COOLING FAN

Cooling Fan Wiring Diagram for Buick LeSabre Custom 2003

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List of elements for Cooling Fan Wiring Diagram for Buick LeSabre Custom 2003:

A10
A11
B10
B11
C10
C11
Cool fan 1 fuse 30a
Cool fan 2 fuse 46 30a
Coolfan 1 relay 40
Coolfan 2 relay 37
Coolfan s/p relay 39
D10
E10
E11
Ect sens sig
Engine coolant temperature sensor (ect) (on rear of
Engine, near thermostat housing)
F11
G10
G103 (on inner body panel)
G11
Hi fan ctrl
Hot at all times
Left cooling fan
Low fan ctrl
Low ref
Powertrain control module (pcm) (in air cleaner housing)
Right cooling fan
Splice pack sp103
Underhood fuse block (right front side of engine compartment)

CRUISE CONTROL

Cruise Control Wiring Diagram for Buick LeSabre Custom 2003

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List of elements for Cruise Control Wiring Diagram for Buick LeSabre Custom 2003:

Abs/tcc switch (near brake pedal)
All times
Cancel input
Cr cont fuse 10a
Cruise control module (on left side of engine compt, on strut tower)
Cruise inhibit
Cruise on/off
Cruise set/coast
Disable output
Engage ouput
Engaged input
G106 (near left strut tower, on frame rail)
Ground
Hot at
Hot in
Ign 1 fuse 10a
Ignition
Inflatable restraint steering wheels module coil
Left steering wheels controls
Nca
On & start
On/off
Pnk
Powertrain control module (pcm) (in air cleaner housing)
Rear fuse block (under left rear seat)
Resume/ accel
Resume/accel
Right steering wheels controls
S215 (body harness, left side of vehicle)
S216
S228
Set/ coast
Splice pack sp106
Splice pack sp301 (under right front seat)
Steering column fuse holder
Stop lp fuse 15a
Stoplamp switch (on brake pedal bracket)
Stp lp sig input
Transmission system
Underhood fuse block (right front side of engine)
Vehicle speed input
Vehicle speed out
Vehicle speed sensor (vss) (on right front of transaxle, below power steering pump)
Vss high
Vss low

DEFOGGERS

Defoggers Wiring Diagram, with Auto A/C for Buick LeSabre Custom 2003

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List of elements for Defoggers Wiring Diagram, with Auto A/C for Buick LeSabre Custom 2003:

(left "c" pillar) g310
(right "c" pillar) g404
A12
C1 a4
C1 c8
C12
C13
C2 b12
C4 h
Class 2 data
Clock sig
Computer data lines system
Data sig
Door locks system
Driver door module (ddm) (in left front door)
Feed
Front passenger door module (fpdm) (in right front door)
Hot at all times
Hot in on & start
Hvac control module
Instrument panel integration module (ipm) (behind left side of dash)
Kdd data
Left outside rearview mirror
Nca
Rear defog control
Rear fuse block (under left rear seat)
Rear integration module (rim) (behind upper left rear seat cushion)
Rear window defogger
Return
Right outside rearview mirror
Rr defog fuse 40a
Rr defog relay
Serial data
Tan/

Defoggers Wiring Diagram, with Manual A/C for Buick LeSabre Custom 2003

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List of elements for Defoggers Wiring Diagram, with Manual A/C for Buick LeSabre Custom 2003:

(left "c" pillar) g310
(right "c" pillar) g404
A12
A14
A15
C2 b12
C3 c4
Class 2 data
Computer data lines system
Defogger switch
Heater & a/c control
Hot at all times
Hot in on & start
Nca
Rear defog control
Rear fuse block (under left rear seat)
Rear integration module (rim) (behind upper left rear cushion)
Rear window defogger
Rr defog fuse 40a
Rr defog relay
Solid state

ELECTRONIC SUSPENSION

Electronic Suspension Wiring Diagram for Buick LeSabre Custom 2003

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List of elements for Electronic Suspension Wiring Diagram for Buick LeSabre Custom 2003:

5 volt reference
Alc relay control
Automatic level control (alc) compressor (above left side of rear axle)
Automatic level control (alc) sensor (above left side of rear axle)
B10
C10
C11
Compressor motor
Elc
Elc fuse 30a
Exhaust solenoid control
G401 (on lower right corner of trunk)
Hot at all times
Hot in run
Low reference
Rear fuse block (under left rear seat)
Rear integration module (rim) (behind upper left rear seat cushion)
Red
Relay
Signal
Solenoid valve

ENGINE PERFORMANCE

3.8L VIN K

3.8L VIN K, Engine Performance Wiring Diagram (1 of 4) for Buick LeSabre Custom 2003

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List of elements for 3.8L VIN K, Engine Performance Wiring Diagram (1 of 4) for Buick LeSabre Custom 2003:

(le sabre) (bonneville)
(not used)
(on lower front of eng block, near starter) knock sensor (ks) bank 1
18x ref
18x reference
3x ref
3x reference
A/t iss low
A/t speed sensor high
Acc
All times
Anti-lock brake system
B c
Battery
Bonneville le sabre
Bypass
Ckp 18x sig
Ckp sync sig
Cmp input
Cmp output
Cmp signal
Computer data lines system
Cooling fans system
Cruise control system
Cruise disable/inhibit
Desired torque input
Dis fuse 10a 20a
E e
Ect sensor ground
Egr control ground
Egr pos sens ground
Evap purge valve
Evaporative emissions canister purge solenoid (top of engine)
Fuel inj 1 control
Fuel inj 2 control
Fuel inj 4 control
Fuel inj 5 control
Fuel inj 6 control
G102 (below ignition control module)
G105 (below ignition control module)
Ground
Hi speed cool fan
Ho2s 1 low
Ho2s 2 low
Hot at
Hot at all times
Hot in run & start
Iac coil b high
Iat sensor ground
Ign control
Ign voltage
Ignition
Ignition control
Ignition control module (icm) (on top left front of eng)
Ignition switch (pigtailed for le sabre)
Instrument cluster system (vehicle speed)
Knock sensor (ks) bank 2 (on lower rear of eng block, near oil filter)
Ks1 input
Ks2 input
Lo speed cool fan
Lock
Maf sensor input
Map sensor +5 v
Map sensor ground
Mass airflow (maf) sensor (top of throttle body)
Not used
Off
Pcm batt fuse 10a
Pcm ground
Pnk
Pnk a
Powertrain control module (pcm) (in air cleaner housing)
Ref low
Reference low
Run
S212 (or s208)
Sensor return
Sensor return (eop)
Serial data (class 2)
Shift sol a control
Shift sol b control
Start
Tan
Tcc switch input
Tp sensor ground
Trans fuse 10a
Trans range sw b
Under- hood fuse block
Vehicle speed sensor (right front of transaxle)
Vss high
Vss low
Vss output

3.8L VIN K, Engine Performance Wiring Diagram (2 of 4) for Buick LeSabre Custom 2003

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List of elements for 3.8L VIN K, Engine Performance Wiring Diagram (2 of 4) for Buick LeSabre Custom 2003:

(below ignition control module) g105
(ign module harn, near icm)
(or
1-2 shift sol
2-3 shift sol
A6 (or pnk)
Automatic transaxle
Automatic transaxle fluid pressure manual valve position switch
Automatic transaxle fluid temperature sensor
Automatic transaxle input shaft speed sensor
Automatic transaxle internal mode switch
B9 (or pnk)
Camshaft position (cmp) sensor (front of eng, below water pump)
Crankshaft position (ckp) sensor (front of eng, behind crank pulley)
Cruise control system
D4 (or pnk)
Fuel injec- tors
Hot in run & start
Ign 1 fuse 10a
Injr 1 fuse 10a
Injr 2 fuse 10a
Pnk
Pressure control sol
Rear fuse block
Red
S135
S136
S216
Tan
Tcc pwm sol
Tcc release switch
Tcc/ cruise release switch (near brake pedal)
Under- hood fuse block

3.8L VIN K, Engine Performance Wiring Diagram (3 of 4) for Buick LeSabre Custom 2003

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List of elements for 3.8L VIN K, Engine Performance Wiring Diagram (3 of 4) for Buick LeSabre Custom 2003:

(bonneville)
(bonneville) (le sabre)
(eng harn, 6.5 cm from iac)
(le sabre)
A/c refrigerant pressure sensor (behind a/c comp, on a/c line)
Bonneville
D a
D3 pnk
Engine oil level switch (in left side of eng oil pan)
Engine oil pressure sensor (front of engine)
Exhaust gas recirculation (egr) valve (top rear of engine)
F/pmp fuse 20a
Fuel pump
Fuel pump relay
Fuel tank pressure sensor (top of fuel tank)
Fuel tank unit
G105 (below ignition control module)
G200 (left front door pillar)
G302 (under rear seat)
G401 (right rear of trunk)
Hot at all times
Hot in run & start
Ign-1 fuse 10a
Ign1 fuse 10a
Instrument cluster
Intake air temperature (iat) sensor (left side of engine compt, in the air intake duct)
Le sabre
Malfunction indicator lamp (led for bonneville)
Manifold absolute pressure (map) sensor (top of engine)
Pnk
Rear fuse block
S105 (engine harn, 9.5 cm from pcm connector)
S106
S216
S401
Stoplight/ auto trans shift lock control switch
Tach input
Tan
Throttle position (tp) sensor (on throttle body assembly)

3.8L VIN K, Engine Performance Wiring Diagram (4 of 4) for Buick LeSabre Custom 2003

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List of elements for 3.8L VIN K, Engine Performance Wiring Diagram (4 of 4) for Buick LeSabre Custom 2003:

(le sabre b c (bonneville)
5 volt reference a
5 volt reference b
A/c comp relay control
A/c ref pressure
A/c system
A/t fluid temp input
Anti-lock brake system
Boost control solenoid (vin 1)
Boost solenoid control
Brake pedal sw out
C b
Cruise control system
Cruise status
Delivered torque control
Ect sensor input
Egr pintle position input
Egr valve control
Eng oil level sw input
Engine coolant temperature (ect) sensor (on rear of eng, near thermostat housing)
Evap solenoid control
Evaporative emissions (evap) canister vent valve
Fuel inj 3 control
Fuel level input
Fuel pump relay control
Fuel tank press sensor
Fuel tank sender
G100 (top of transmission)
Gen term f monitor
Gen term l control
Heated oxygen bank 1 sensor 1 (in right exhaust manifold)
Heated oxygen bank 1 sensor 2 (rear of catalytic converter)
Ho2s 1 input
Ho2s 2 input
Hot in run & start
Hot in run and start
Iac coil a high
Iac coil a low
Iac coil b low
Iat sensor input
Idle air control (iac) valve (on throttle body assembly)
Ign 1 fuse 10a
Ignition
Ignition 1
Map sensor input
Mil control
Nca
Oil pressure signal
Oxy sen fuse 10a
Pcm ign fuse 10a
Pnk
Powertrain control module (pcm) (in air cleaner housing)
Press sol high control
Press sol low control
Rear fuse block
Red
Sensor ground
Starter relay output
Starting/charging system
Tach signal
Tan
Tcc pwm sol control
Tp sensor input
Trans range p
Trans range sw a input
Trans range sw c input
Trans tcc release sw in
Under- hood fuse block
Vent sol fuse 10a

EXTERIOR LIGHTS

Back-up Lamps Wiring Diagram for Buick LeSabre Custom 2003

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List of elements for Back-up Lamps Wiring Diagram for Buick LeSabre Custom 2003:

(behind upper left rear cushion) rear integration module
A12
Automatic transaxle internal mode switch (ims)
Automatic transaxle
B12
C100
Computer data lines system
G105 (rear of engine, behind power steering pump)
G401 (on lower right corner of trunk, forward of tail lamp)
Hot at all times
Left back- up lamp
Powertrain control module (in air cleaner housing)
Prk/rev fuse 10a
Rear fuse block (under left rear seat)
Reverse lamp relay
Reverse lp rly ctrl
Right back- up lamp
S411
Serial data
Splice pack sp105
Splice pack sp401
Tr sw a
Tr sw b

Exterior Lamps Wiring Diagram for Buick LeSabre Custom 2003

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List of elements for Exterior Lamps Wiring Diagram for Buick LeSabre Custom 2003:

(behind right side of dash) dash integrated control module)
(i/p harn, near breakout to i/p integration module)
(near left strut tower, on frame rail)
(rear compt lid harn, near grommet at license plate lamp)
Batt
C1 a3
C1 a4
C1 a7
C1 a8
C1 b4
C1 b5
C1 b6
C1 b7
C1 b8
C1 b9
C1 c9
C2 b5
C2 e6
C2 e7
C2 f8
C2 f9
Dmr fuse 10a
Driver's outside rearview mirror (turn signal indicator)
F12
G103 (mounted to inner body panel, forward of under- hood fuse block)
G103 (mounted to inner body panel, forward of underhood fuse block)
G106
G200 (lower front corner of passenger compt, on left front door pillar)
G200 (passenger compt, on left front door pillar)
G201 (lower right corner of passenger compt, on right front door pillar)
G201 (passenger compt, on right front door pillar)
G401 (on lower right corner of trunk, forward of tail lamp)
G402 (on lower left corner of trunk, forward of tail lamp)
Gnd
Hazard sw
Head-up display module (on top left side of dash)
Headlamp sw
Headlamp sw sign
Headlamp switch
Headlights system
High mounted stop lamp
Hot at all times
Hot in run & start
Ign1 fuse 10a
Instrument panel cluster
L cornering lmp
Left cornering lamp
Left front marker lamp
Left front park/ turn signal lamp
Left license plate lamp
Left rear marker lamp
Left rear park lamps
Left tail/ stop/turn lamp
Left turn
Left turn ind
Lf turn sign lmp
Lh park lp fuse 10a
Lr stop/turn lmp
Nca
Nca b
Not used
Park lamp sw sign
Park lp relay
Passenger's outside rearview mirror (turn signal indicator)
Pk lp on input
Pk lp sw
Pnk
Prk lp rly ctrl
R cornering lmp
Rear fuse block (under left rear of seat)
Rf turn sign lmp
Rh park lp fuse 10a
Right cornering lamp
Right front marker lamp
Right front park/ turn signal lamp
Right license plate lamp
Right rear marker lamp
Right rear park lamps
Right tail/ stop/turn lamp
Right turn
Right turn ind
Rr stop/turn lmp
S121
S122
S203
S208
S224 nca
S226
S251
S252
S309
S411
S412
S413
Sp200
Splice pack sp103
Splice pack sp106
Splice pack sp200
Splice pack sp201
Splice pack sp301 (under left front seat)
Splice pack sp401
Stop lmp sw out
Stop lp fuse 15a
Stoplamp switch (on brake pedal support) c1
Tan
Tsig/ haz fuse 15a
Turn signal/ hazar switch
Turn signal/hazard flasher module (under left side of dash)
Under- hood fuse block (right front side of engine) compt)
Under- hood lamp

GROUND DISTRIBUTION

Ground Distribution Wiring Diagram (1 of 4) for Buick LeSabre Custom 2003

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List of elements for Ground Distribution Wiring Diagram (1 of 4) for Buick LeSabre Custom 2003:

A/c compressor clutch
A/c compressor clutch diode
Accy relay
Automatic transaxle
Brake fluid level switch
Coil
Contact
Cool fan s/p relay (series/ parallel)
Cruise control module
Drl relay
Electronic brake control module (ebcm)
Engine oil level switch
F11
G100 (left side of eng)
G101
G102 (lower front of eng)
G103 (on inner body panel)
G104 (on top of transmission)
G105 (behind power steering pump)
G106 (near left strut tower)
G107 (in front of underhood fuse block)
Heated oxygen sensor (ho2s) (b1,s1)
Heated oxygen sensor (ho2s) (b1,s2)
Horn assembly
Ign-1 relay
Ignition control module (icm)
Internal mode switch
Left cooling fan
Left cornering lamp
Left front park/turn signal lamp
Left low beam headlamp
Mass air- flow (maf) sensor
Nca
Powertrain control module (pcm)
Right front park/turn lamp
S108 (in engine harn, 18 cm from a/c clutch connector breakout)
S122 (in forward lamp harness 17 cm from c108)
Splice pack sp100
Splice pack sp105
Splice pack sp106
Underhood fuse block (right front side of engine compartment)
Underhood lamp
W/cornering lamps
W/o cornering lamps
Windshield washer pump
Windshield wiper motor

Ground Distribution Wiring Diagram (2 of 4) for Buick LeSabre Custom 2003

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List of elements for Ground Distribution Wiring Diagram (2 of 4) for Buick LeSabre Custom 2003:

(in i/p harn, 6.5 cm from radio breakout)
A16
Auto a/c
Auto trans shift lock control actuator
B16
Blower control module
D16
Dash integration module (dim)
Data link connector (dlc) (partial)
Driver door lock switch
Driver door module (ddm)
Driver door switch assembly (ddsa)
Driver heated seat switch
Driver information display switch
Front cigar lighter
G200 (on left front dor pillar)
G201 (on right front door pillar)
G300 (on forward crossmember)
Headlamp switch
Heads up display (hud) dimmer switch
Heads up display (hud) switch
Heater & a/c control
I/p compartment lamp switch
If equipped
Inflatable restraint steering wheel module coil
Instrument panel cluster (ipc)
Instrument panel integration module (ipm)
Key buzzer switch
Left front door lock actuator
Left front door lock cylinder switch
Left side steering wheel controls
Manual a/c
Memory personal- ization function switch
Nca
Passenger door module (pdm)
Radio
Rear compartment lid release switch
Right side steering wheel controls
S203 (in i/p harn, 17.5 cm from ipm breakout)
S205 (in i/p harn, 13.5 cm from hvac breakout)
S208
S214 (in steering wheel harn, 5 cm from sir coil)
S225 (in steering column harness)
S226 (in steering column harness)
S253
S500 (in left front door trim harn, 19 cm from 503 breakout)
Splice pack sp200
Splice pack sp300
Steering column fuse holder
Tcc/cruise release switch
Traction control switch
Turn signal multifunction switch
Turn signal/ hazard flasher lamp module
Vehicle theft deterrent control module

Ground Distribution Wiring Diagram (3 of 4) for Buick LeSabre Custom 2003

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List of elements for Ground Distribution Wiring Diagram (3 of 4) for Buick LeSabre Custom 2003:

(under left rear seat) rear fuse block
(under right side of rear seat) g305
6 way seats
8 way seats
A11
A18
B12
Battery
D (or e)
Dash integration module (dim)
Driver heated seat module
Driver memory seat module
Driver seat adjuster switch
Driver seat recline switch
Floor ctsy lmp relay
Front auxiliary power outlet
Front passenger heated seat module
Front passenger seat adjuster switch
Front passenger seat recline switch
Fuel door lock relay
Fuel door unlock relay
Fuel pump relay
G301 (on forward crossmember)
G302 (under left side of rear seat)
G303 (under right front seat)
G310 (on right "c" pillar)
G404 (behind left rear "c" pillar)
If equipped
Ign-1 relay
Inflatable restraint sensing & diagnostic module (sdm)
Left rear door module (lrdm)
Nca
Onstar cellular antenna
Rear auxiliary power outlet
Rear window defogger
Remote control door lock receiver (rcdlr)
Right rear door module (rrdm)
S315 (in left seat harn, 6.5 cm from left front seat 6.5 cm from left heated seat module connector breakout)
S316
S321 (in left seat harn, 9.5 cm front seat, 9.5 cm from left seat harn clip)
S322 (in right seat harn, under right front seat, 9.5 cm from right right seat harn clip)
S324 (w/heated seats) (in left seat harness, under left front seat 9.5 cm from left seat harn clip)
Splice pack sp301
Splice pack sp302
Vehicle communication unit (vcu)
W/2 way power seats
W/6 & 8 way power seats
W/heated seats
W/memory & lumbar seats, auto dimming inside rear view & outside mirrors
W/o heated seats
W/o memory & lumbar seats, auto dimming inside rear view & outside mirrors

Ground Distribution Wiring Diagram (4 of 4) for Buick LeSabre Custom 2003

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List of elements for Ground Distribution Wiring Diagram (4 of 4) for Buick LeSabre Custom 2003:

(w/ garage door opener)
(w/o garage door opener)
Automatic level control air compressor
Center high mounted stop lamp (chmsl)
Fuel tank unit
G401 (on lower right corner of trunk)
G402 (on lower left corner of trunk)
Garage door opener
If equipped
Inside rear view mirror
Left tail/ stoplamp
Left back-up lamp
Left rear reading lamp switch
Left tail/ stoplamp
Left vanity mirror
License lamp
Marker lamp
Outside moisture sensor
Overhead console cigar lighter
Overhead console reading lamp
Rear compartment lid release actuator
Rear integration module (rim)
Right back-up lamp
Right cornering lamp
Right high beam headlamp
Right low beam headlamp
Right rear reading lamp switch
Right rear side marker lamp
Right rear turn/stop taillamp
Right tail/ stoplamp
Right vanity mirror
S100 (in forward lamp harn, 4 cm from g103 breakout)
S121 (in forward lamp harn, 17 cm from c109)
S329 (in headliner harn, 15.6 cm from c329)
S334
S360
S411 (in rear compt lid harn, 34.5 cm from p410 breakout)
Splice pack sp401
Splice pack sp402
Sunroof module
Vehicle interface unit (viu)
W/ cornering lamps
W/o cornering lamps

HEADLIGHTS

Headlights Wiring Diagram, with Auto A/C for Buick LeSabre Custom 2003

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List of elements for Headlights Wiring Diagram, with Auto A/C for Buick LeSabre Custom 2003:

(top center of dash) sunload sensor assembly
A11
A12
B10
B11
B12
Computer data lines system
Dash integration module (dim) (right side of dash)
Dimmer switch
Drl relay
F11
Flash- to-pass switch
Fog/ drl fuse 15a
G103 (forward of underhood fuse block)
G200 (on left front door pillar)
G401 (on lower right corner of trunk)
Hdhi- bml fuse 10a
Hdhi- bmr fuse 10a
Hdlo- bml fuse 15a
Hdlo- bmr fuse 15a
Hdlp hi bm relay
Hdlp lo bm relay
Headlamp beam switch
Headlamp dimmer switch
Headlamp switch
Hot at all times
Instrument panel integration module (behind left side of dash)
Interior lamp switch
Interior lights system
Ip fuse 10a
Left high beam head- lamp
Left low beam head- lamp
Lights on ind
Low
M10
M11
N11
Nca
P10
P11
Pk lp switch
Pnk
Prk lp relay
Rear fuse block (under left rear seat)
Right high beam head- lamp
Right low beam head- lamp
S100
S122 (w/ cornering lamps)
S204 (i/p harn, upper left side of dash)
S206
S208
S226
Splice pack sp103
Splice pack sp200
Splice pack sp401
Twilight delay sw
Underhood fuse block (right front side of engine compt)
Wiper/ washer system

Headlights Wiring Diagram, with Manual A/C for Buick LeSabre Custom 2003

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List of elements for Headlights Wiring Diagram, with Manual A/C for Buick LeSabre Custom 2003:

(top center of dash) sunload sensor assembly
A11
A12
B10
B11
Computer data lines system
Dash integration module (dim) (right side of dash)
Dimmer switch
Drl relay
F11
Flash- to-pass switch
Fog/ drl fuse 15a
G103 (forward of underhood fuse block)
G200 (on left front door pillar)
G401 (on lower right corner of trunk)
Hdhi- bml fuse 10a
Hdhi- bmr fuse 10a
Hdlo- bml fuse 15a
Hdlo- bmr fuse 15a
Hdlp hi bm relay
Hdlp lo bm relay
Headlamp beam switch
Headlamp dimmer switch
Headlamp switch
Hot at all times
Hvac control module (behind left side of dash)
Interior lamp switch
Interior lights system
Ip fuse 10a
Left high beam head- lamp
Left low beam head- lamp
Lights on ind
Low
M10
M11
N11
Nca
P10
P11
Pk lp switch
Pnk
Prk lp relay
Rear fuse block (under left rear seat)
Right high beam head- lamp
Right low beam head- lamp
S100
S122 (w/ cornering lamps)
S204 (i/p harn, upper left side of dash)
S206
S208
S226
Splice pack sp103
Splice pack sp200
Splice pack sp401
Twilight delay sw
Underhood fuse block (right front side of engine compt)
Wiper/ washer system

HORN

Horn Wiring Diagram for Buick LeSabre Custom 2003

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List of elements for Horn Wiring Diagram for Buick LeSabre Custom 2003:

1995 vftc c
A12
B12
C202
D10
Dash integration module (behind right side of dash)
Dual horn assembly (behind left front fascia)
G103
Horn fuse 15a
Horn relay
Horn switch
Hot at all times
Inflatable restraint steering wheel module
Inflatable restraint steering wheel module coil
Nca
Sp103 (forward of underhood fuse block)
Underhood fuse block

INSTRUMENT CLUSTER

Head-Up Display Wiring Diagram for Buick LeSabre Custom 2003

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List of elements for Head-Up Display Wiring Diagram for Buick LeSabre Custom 2003:

Battery
C11
Computer data lines system
Cruise control system, instrument cluster system
Data lines
Dimming
Dimming signal
Exterior lights system
G201 (lower right corner of passenger compt, on right right front door pillar)
Ground
Head-up display (hud) dimmer switch
Head-up display (on top left side of dash)
Hot at all times
Hot in run or start
Ign 3 fuse 10a
Ignition
Image down
Image up
Instrument cluster circuit
Interior lights system
Ip fuse 10a
Lf turn signal
Motor down feed
Motor up feed
Powertrain control module (pcm) (in air cleaner housing)
Rear fuse block (under left rear seat)
Rf turn signal
S200
S201 (dash harn, 23.5 cm from instrument panel) cluster)
S203
S205
S206
S215 (body harn, left side of vehicle, 19.5 cm from pass through grommet)
Vehicle speed signal

Instrument Cluster Wiring Diagram, with U2E for Buick LeSabre Custom 2003

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List of elements for Instrument Cluster Wiring Diagram, with U2E for Buick LeSabre Custom 2003:

Abs ind
Abs ind control
Airbag ind
Airbag ind control
Battery
Brake fluid level switch (in master cylinder reservoir)
Brake fluid lvl
Brake ind
Brake ind control
Check oil level ind
Check oil level ind control
Computer data lines system
Coolant temp ind
Coolant temp ind control
Cruise control system
Cruise ind
Cruise ind control
Data lines
Driver information center (dic) switch
Electronic brake control module (ebcm) (on left front of engine compt)
Eng/ met
Eng/met sign
Exterior lights system
Fuel gauge
Fuel info
G103 (mounted to inner body panel, forward of underhood fuse block)
G106 (near left strut tower, on framerail)
G200 (lower front corner of passenger compt, on left front door pillar)
G201 (lower right corner of passenger compt, on right front door pillar)
Gauge info
Ground
Head-up display circuit
Hi beam in control
High beam ind
Hot at all times
Hot in run or start
Ign 1 fuse 10a
Ignition
Illumination
Instrument cluster
Interior lights system
Ip fuse 10a
Left turn
Left turn ind
Mil control
Odo/ trip
Odo/trip
Oil pressure ind
Oil pressure ind control
Park brake
Park brake switch (on top of park brake pedal assembly)
Pnk
Powertrain control module (pcm) (in air cleaner housing)
Rear fuse block (under left rear seat)
Reset
Right turn
Right turn ind
S201 (dash harn, 23.5 cm from instrument cluster panel)
S203
S206
S208
S216
S253
Seat belt ind
Seat belt ind control
Security ind
Security ind control
Service engine soon ind
Speedometer gauge
Tach signal
Tacho- meter
Tachometer
Tan
Temperature gauge
Traction off ind
Traction off ind control
Traction on ind
Underhood fuse block (right front side of engine compt)
Vehicle speed
Volt ind
Volt ind control
Vss signal
Washer fluid lvl
Windshield washer fluid level switch (in windshield washer fluid reservoir)

Instrument Cluster Wiring Diagram, with UB7 for Buick LeSabre Custom 2003

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List of elements for Instrument Cluster Wiring Diagram, with UB7 for Buick LeSabre Custom 2003:

Abs ind
Abs ind control
Airbag ind
Airbag ind control
Battery
Brake fluid level switch (in master cylinder reservoir)
Brake fluid lvl
Brake ind
Brake ind control
Check oil level ind
Check oil level ind control
Computer data lines system
Coolant temp ind
Coolant temp ind control
Cruise control system
Cruise ind
Cruise ind control
Data lines
Driver information center (dic) switch
Electronic brake control module (ebcm) (on left front of engine compt)
Eng/ met
Eng/met sign
Exterior lights system
Fuel gauge
G103 (mounted to inner body panel, forward of underhood fuse block)
G106 (near left strut tower, on framerail)
G200 (lower front corner of passenger compt, on left front door pillar)
G201 (lower right corner of passenger compt, on right front door pillar)
Ground
Head-up display circuit
Hi beam in control
High beam ind
Hot at all times
Hot in run or start
Ign 1 fuse 10a
Ignition
Illumination
Instrument cluster
Interior lights system
Ip fuse 10a
Left turn
Left turn ind
Mil control
Oil pressure ind
Oil pressure ind control
Park brake
Park brake switch (on top of park brake pedal assembly)
Pnk
Powertrain control module (pcm) (in air cleaner housing)
Rear fuse block (under left rear seat)
Reset
Right turn
Right turn ind
S201 (dash harn, 23.5 cm from instrument cluster panel)
S203
S206
S208
S216
S253
Seat belt ind
Seat belt ind control
Security ind
Security ind control
Service engine soon ind
Speedometer gauge
Tach signal
Tacho- meter
Tachometer
Temperature gauge
Traction off ind
Traction off ind control
Traction on ind
Trip reset
Underhood fuse block (right front side of engine compt)
Vehicle speed
Volt ind
Volt ind control
Vss signal
Washer fluid lvl
Windshield washer fluid level switch (in windshield washer fluid reservoir)

INTERIOR LIGHTS

Courtesy Lamps Wiring Diagram (1 of 2) for Buick LeSabre Custom 2003

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List of elements for Courtesy Lamps Wiring Diagram (1 of 2) for Buick LeSabre Custom 2003:

A12
B12
C1 a4
Class 2 serial data line
Computer data lines system
D12
Driver door courtesy lamp
Driver door module (upper right corner of door, behind trim panel)
E11
E12
G401 (lower right corner of trunk, forward of tail lamp)
Ground
Hot at all times
Instrument panel integration module (ipm) (behind left side of dash)
Int lp fuse 10a
Int lp relay
Interior lamp relay control
Left foot well courtesy lamp
Left front door lock actuator
Left front door open input
Left rear door courtesy lamp
Left rear door lock actuator
Left rear door module (lrdm) (in left rear door)
Left rear door open input
Rear compartment courtesy lamp
Rear compartment lid release actuator
Rear fuse block (under left rear seat)
Rear integration module (rim) (behind upper left rear seat cushion)
Red/
Right front door lock actuator
Right front door module (rfdm) (in right front door, near door latch)
Right front door open input
Right rear door lock actuator
Right rear door module (rrdm) (in right rear door)
Right rear door open input
S302
Simple bus interface (sbi)
Sp306 (in body harn splicesaver, 8 cm from rear fuse block breakout)
Tan
Tan/
To s332 (diagram 2 of 2)
To s333 (diagaram 2 of 2)
To sp310 (diagaram 2 of 2)
To sp310 (diagram 2 of 2)
Trunk lid open input

Courtesy Lamps Wiring Diagram (2 of 2) for Buick LeSabre Custom 2003

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List of elements for Courtesy Lamps Wiring Diagram (2 of 2) for Buick LeSabre Custom 2003:

(in headliner, approx 35.5 cm from overhead console connector breakout) s333
(in headliner, approx 42 cm from overhead console connector breakout) s332
(w/ vanity mirror)
(w/o vanity mirror)
A10
B10
Courtesy lamp ground
From rear fuse block (diagram 1 of 2)
From sp306 (diagram 1 of 2)
Front passenger door courtesy lamp
Front passenger foot well courtesy lamp
G201 (lower right corner of passenger compt on right front door pillar)
G402 (on lower left corner of trunk, forward of tail lamp)
I/p compartment switch/ lamp
Inadvertent power input
Left front reading courtesy lamp
Left rear reading courtesy lamp
Left vanity mirror
Overhead console
Rear integration module (rim) (behind upper left rear seat cushion)
Right front reading courtesy lamp
Right rear door courtesy lamp
Right rear reading courtesy lamp
Right vanity mirror
S203
S329
Sp310 (in body harn splicesaver, 18 cm from rear fuse block breakout)

Instrument Illumination Wiring Diagram (1 of 2) for Buick LeSabre Custom 2003

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List of elements for Instrument Illumination Wiring Diagram (1 of 2) for Buick LeSabre Custom 2003:

(auto hvac) a5
(auto hvac) b1
(in steering column harness) s227
(instrument panel harness) s207
(manual hvac) b15
(manual hvac) b16
C1 a4
C1 d4
C3 b8
Control power
Dash integration module (dim) (behind right side of dash, under sound insulator)
Dimr fuse 14 10a
Drivers information center (dic) switch
Front cigar lighter
G200 (lower front corner of passenger compt on left front door pillar)
G201 (lower right corner of passenger compt on right front door pillar)
Head- lamp switch
Heads up display (hud) switch
Heater & a/c control assembly
Hot at all times
Incandescent dimming output
Inflatable restraint steering wheel module coil
Instrument cluster
Left steering wheel controls
Nca
Nca f
Nca h
Park lamp input
Park lamp relay control
Prk lp relay
Radio
Rear fuse block (under left side of rear seat)
Right steering wheel controls
S208
S225
S228 (in steering column harness)
Sp301 (in body harness splicesaver, left side)
Steering column fuse holder
Switch fuse 2a

Instrument Illumination Wiring Diagram (2 of 2) for Buick LeSabre Custom 2003

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List of elements for Instrument Illumination Wiring Diagram (2 of 2) for Buick LeSabre Custom 2003:

(auto hvac) (manual hvac)
(left front door trim harn, between door & door trim panel)
(right front door trim harn, between door & door trim panel)
5v ref
A11
A12
Air temperature switch assembly
B11 a2
B12 a6
B8 a4
C1 a4
C1 a5
C2 a12
C2 b12
C2 b2
C6 b6
Class 2 serial data line
Climate control panel (manual a/c) instrument panel integration module (ipm) (auto a/c) (behind left side of dash)
Computer data lines system
D8 a3
Dash integration module (dim) (behind right side of dash, under sound insulator)
Driver door lock switch
Driver heated seat switch (if equipped)
Driver window switch
Drivers door module (upper right corner of door, behind trim panel)
Front passenger power door lock switch
Front passenger power window switch
G200 (lower front corner of passenger compt on left front door pillar)
Ground
Headlamp switch
I/p dimmer switch
I/p dimmer switch input
Incadescent dimming output
Instrument cluster (ipc)
Interior lamp switch
Interior lamp switch input
Memory function switch (if equipped)
Off
Radio
Rear integration module (rim) (behind upper left rear seat cushion)
Right front door module (rfdm) (in right front door, near door latch)
Right front heated seat switch (if equipped)
S204 (i/p harn, left side of dash)
S208
S302
S500 (left front door trim harn, between door & door trim panel)
S501
S603
S604 (right front door trim harn, between door & door trim panel)
Sensor return
Simple bus interface (sbi)
Twilight delay switch

MEMORY SYSTEMS

Memory Mirrors Wiring Diagram for Buick LeSabre Custom 2003

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List of elements for Memory Mirrors Wiring Diagram for Buick LeSabre Custom 2003:

(body harn, 14.5 cm from left power seat breakout)
(left front door trim harn, 19 cm from c503) s500
A up/down motor position input
B left/right motor position input
Batt(+)
Battery
Driver
Driver 1 input
Driver 2 input
Driver door module (inside driver's door)
Driver door switch assembly
Driver outside rearview mirror
Drv mdl fuse 10a
E postion sensors return
Exit
G200 (left front door pillar)
G201
Gnd
Heating element feed
Heating element return
Hot at all times
Interior lights system
J left/right motor control
K up/down motor control
Left/ right motor
Left/ right motor position sensor
Left/right motor control
M postion sensors feed
Memory personalization function switch
Mirror heating element
Motor control
Nca
Pass mdl fuse 10a
Passenger door module (inside passenger's door)
Passenger outside rearview mirror
Rear fuse block
S302
S602 (lesabre)
Serial data
Splice pack sp200
Splice pack sp201 (right front door pillar)
Up/ down motor
Up/ down motor position sensor
Up/down l

Memory Seat Wiring Diagram for Buick LeSabre Custom 2003

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List of elements for Memory Seat Wiring Diagram for Buick LeSabre Custom 2003:

(in left seat harn, 16 cm from left seat harn clip)
(in left seat harn, 21 cm from left seat harn clip)
(left front door trim harn, 19 cm from c503) s500
(left lumbar harn, 5 cm from c14 connector)
Batt
Battery
C10
C11
C12
C13
C14
C15
C16
Class 2 data
Computer data lines system
D10
D11
D12
D13
D14
D15
D16
Driver
Driver 1 input
Driver 2 input
Driver door module (inside driver's door)
Driver door switch assembly
Driver seat adjuster switch
Driver seat front vertical motor
Driver seat front vertical position sensor
Driver seat horizontal motor
Driver seat horizontal position sensor
Driver seat lumbar horizontal motor
Driver seat lumbar horizontal position sensor
Driver seat lumbar switch
Driver seat lumbar vertical motor
Driver seat lumbar vertical position sensor
Driver seat rear vertical motor
Driver seat rear vertical position sensor
Driver seat recline motor
Driver seat recliner position sensor
E12
Exit
Frnt hgt mtr sens in
Front
Front height sw input
Frt vert dn ctrl
Frt vert up ctrl
Fwd
Fwd-bk mtr sens in
Fwd/bk sw input
G301 (on forward crossmember)
Ground
Horiz backward ctrl
Horiz forward ctrl
Hot at all times
Interior lights system
Lumbar down ctrl
Lumbar down in
Lumbar forward ctrl
Lumbar in input
Lumbar in/out sens in
Lumbar out in
Lumbar rearward ctrl
Lumbar up ctrl
Lumbar up in
Lumbar up/dn sens in
Mem fuse 10a
Memory personalization funciton switch
Memory seat module (under driver's seat)
Nca
Out
Pnk
Pnk a
Position sensors feed
Pwr seat circuit breaker 30a
Rear
Rear fuse block
Rear height sw input
Rear hgt mtr sens in
Rear vert up ctrl
Recline
Recline back ctrl
Recline forward ctrl
Recline mtr sens in
Recliner sw input
Red
S317
S317 (in left seat harn, 11.5 cm from left seat harn clip)
S319
S320
S321 (w/ heated seats)
S330
S331
Serial data
Solid state
Splice pack sp301
Tan

POWER DISTRIBUTION

Power Distribution Wiring Diagram (1 of 4) for Buick LeSabre Custom 2003

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List of elements for Power Distribution Wiring Diagram (1 of 4) for Buick LeSabre Custom 2003:

(on forward crossmember) g301
(on right front door pillar) g201
A/c clu fuse 15a
A/c clutch relay
Abs fuse 50a
Accy fuse 15a
Accy relay
Automatic trans- mission
Aux pwr fuse 20a
B12
Battery
C/ltr fuse
Cigar lighter
Cool fan 1 fuse 30a
Cool fan 1 relay (low speed)
Cool fan 2 fuse 30a
Cool fan 2 relay (high) speed)
Cool fan s/p relay
Cr cont fuse 10a
Cruise control module
D12
D8 pnk
Dis fuse 20a
Drl relay
E12
Electronic brake control module
Evaporative emissions canister purge solenoid
Fog/ drl fuse 15a
From fog/ b drl fuse (diagram 1 of 4)
From pcm c batt fuse (diagram 1 of 4)
Front auxiliary power outlet
Fuel injector
G103 (on inner body panel)
Generator
Hdhi bml fuse 10a
Hdhi bmr fuse 10a
Hdlo bml fuse 10a
Hdlo bmr fuse 10a
Hdlp lo bm relay
Hdlp hi bm relay
Heated oxygen sensor bank 1 sensor 12 (ho2s1)
Heated oxygen sensor bank 1 sensor 2 (ho2s2)
Horn fuse 15a
Horn relay
Ign 1 fuse 10a
Ign-1 relay
Ignition control module
Injr 1 fuse 10a
Injr 2 fuse 10a
Interior lights system
Left high beam headlamp
Left low beam headlamp
Mass airflow sensor
Outside moisture sensor
Oxy sen fuse 10a
Pcm batt fuse 10a
Pcm ign fuse 10a
Pnk
Power- train control module
Powertrain control module
Rear auxiliary power outlet
Red
Right high beam headlamp
Right low beam headlamp
S203
S350
Start 1 relay
Start circuit breaker 30a
Start relay
Starter solenoid
Theft deterrent control module
To body fuse (diagram 2 of 4)
To cigar relay (diagram 2 of 4)
To hdlp lo bm relay (diagram 1 of 4)
To ign-1 relay (diagram 1 of 4)
To underhood fuse block (diagram 4 of 4)
Trans fuse 10a
Underhood fuse block
W/ battery saver
W/o battery saver
Wind- shield wiper motor
Wind- shield wiper switch
Wsw fuse 30a

Power Distribution Wiring Diagram (2 of 4) for Buick LeSabre Custom 2003

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List of elements for Power Distribution Wiring Diagram (2 of 4) for Buick LeSabre Custom 2003:

(in body harn, 12 cm from rear fuse block breakout) s309
(in body harn, 17 cm from p100) s216
(in body harn, 5.5 cm from rear fuse block breakout s308
(in left seat harn, 11.5 cm from left seat harn)
(in rear compt lead harn, 34.5 cm from p410 breakout) s411
(under left side of rear seat) g302
A10
A11
A12
Aldl fuse 10a
Audio fuse 10a
B nca
B12
Body fuse 15a
Cigar fuse 40a
Cigar relay
D10
D11
D12
Dash integration module
Data link connector
Dim fuse 10a
Dimr fuse 10a
Driver heated seat module
Driver memory seat module
Driver seat adjuster switch
Driver seat lumbar switch
E11
Evaporative emissions canister purge solenoid
F/ pmp relay
F/pmp fuse 20a
F/tnk dr lock relay
F/tnk dr rel relay
From aux/pwr fuse (diagram 1 of 4)
From battery a (diagram 1 of 4)
From e cigar fuse (diagram 2 of 4)
From f aldl fuse (diagram 2 of 4)
Garage door opener
Generator
Htdst lf fuse 10a
Htdst rf fuse 10a
Hvac batt fuse 10a
Hvac control module
Ign-1 fuse 10a
Ign-1 relay
Inflatable restraint sensing & diagnostic module
Instrument cluster
Instrument panel integration module
Int lamp relay
Int lp fuse 10a
Left front turn signal/ park lamp
Left license plate lamp
Left marker lamp
Left tail/ stop lamp
Lp pkl fuse 10a
Lp pkr fuse 10a
Mem fuse 10a
Nca
Park lp relay
Park relay
Passenger heated seat module
Pnk
Power sun roof module
Prk/rev fuse 10a
Radio
Rap fuse 20a
Rap relay
Rear defog relay
Rear fuse block
Rear integration module
Rear intrgration module
Reverse relay
Right front turn signal/ park lamp
Right license plate lamp
Right marker lamp
Right tail/ stop lamp
Rr defog fuse 40a
S224
S317
S406
Sir fuse 15a
Steering column fuse holder
Stoplight/ auto trans shift lock control switch
To drv mdl fuse (diagram 3 of 4)
To ign-1 relay (diagram 2 of 4)
To park lp relay (diagram 2 of 4)
To rear fuse block (diagram 4 of 4)
Trk rel relay
Trk/ rel relay
Turn signal/ multifunction switch
Under- hood fuse block
Vehicle communication interface module (vcim)
Vent sol fuse 10a
W/ electronic a/c
W/ universal garage door opener
W/o electronic a/c
W/o universal garage door opener

Power Distribution Wiring Diagram (3 of 4) for Buick LeSabre Custom 2003

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List of elements for Power Distribution Wiring Diagram (3 of 4) for Buick LeSabre Custom 2003:

(in hvac harn, 30 cm from c204 breakout) s221
(in i/p harn, 6 cm from instrument cluster breakout) s200
(in i/p harn, 6.5 cm from instrument cluster breakout) s206
(in left seat harn, 9.5 cm from right seat harn) s323
(in right front door harn, 10 cm from door module conn breakout) s602
(under left side of rear seat) g302
A10
A11
Abs fuse 10a
Automatic level control compressor
B10
Blower motor control processor
C11
C12
Dash inte- gration module
Digital radio receiver
Driver adjuster seat switch
Driver door module
Driver heated seat module
Drv mdl fuse 10a
E10
E12
Elc fuse 30a
Elc relay
Electronic brake control module
F h
F12
From audio i amp fuse (diagram 3 of 4)
From hvac g batt fuse (diagram 2 of 4)
From stop h lp fuse (diagram 3 of 4)
Front passenger door module
Front passenger heated seat module
Front passenger seat adjuster switch
Front passenger seat recline switch
Head up display
Head up display switch
Headlamp switch
Heater & a/c control module
Hvac blo fuse 30a
Hvac control module
Hvac fuse 10a
Ign sw fuse 15a
Ign-3 fuse 10a
Ign-3 relay
Inside rear view mirror
Instrument panel cluster
Instrument panel integration module
Ip fuse 10a
Left air temperature actuator
Left rear door module
Memory seat module driver
Mode actuator
Pass mdl fuse 10a
Pwr seat circuit breaker 30a
Pwr wdo circuit breaker 30a
Rear fuse block
Rear inte- gration module
Recirc- ulation actuator
Red
Remote control door lock receiver
Right air temperature actuator
Right rear door module
Right seat lumbar switch
Rrdrmdl fuse 10a
S221
S304 (in body harn, 11.5 cm from g300 breakout)
S307 (in body harn, 1.5 cm from rear fuse block breakout)
Sdar fuse 5a
Stop lp fuse 15a
Stoplamp/ auto trans shift lock control switch
To ign sw fuse (diagram 3 of 4)
To ign-3 3 relay (diagram 3 of 4)
To ignition switch (diagram 4 of 4)
To rear fuse block (diagram 4 of 4)
Tsig/haz fuse 15a
Turn signal/ hazard flasher module
Underhood fuse block
W/ 6 way seat
W/ electronic a/c
W/ memory seat
W/ recline seat w/o recline seat
W/o 6 way seat
W/o electronic a/c
W/o memory seat

Power Distribution Wiring Diagram (4 of 4) for Buick LeSabre Custom 2003

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List of elements for Power Distribution Wiring Diagram (4 of 4) for Buick LeSabre Custom 2003:

(in body harn, 56 cm from rear of dim breakout) s212
A/c clutch relay
A11
Acc
Assembly breakout)
Dash integration module
E10
Elc relay
From accy relay (diagram 1 of 4)
From ign sw fuse (diagram 3 of 4)
From ign-1 relay (diagram 1 of 4)
From ign-1 relay (diagram 2 of 4)
From ign-3 relay (diagram 3 of 4)
Ignition switch
Lock
Nca
Park relay
Pnk
Powertrain control module
Rear defog relay
Rear fuse block
Run
S208
Start
Theft deterrent control module
Underhood fuse block
Unlock

POWER DOOR LOCKS

Door Lock Wiring Diagram for Buick LeSabre Custom 2003

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List of elements for Door Lock Wiring Diagram for Buick LeSabre Custom 2003:

(in left front door)
(in right front door)
(lower right "a" pillar) g201
(under left rear seat) g302
Actuator dr
Air conditioning systems
Ajar
Battery
Class 2 data
Computer data lines system
Cylinder switch
Door ajar
Door open
Driver door lock actuator
Driver door lock switch
Driver door module
Driver door switch assembly
Drvmdl fuse 7 10a
E10
Front passenger door lock actuator
Front passenger door module
G200 (lower left "a" pillar)
G301 (under right front seat)
Grd
Ground
Hot at all times
Ign sw fuse 29 15a
Interior lights system
Key cyl in
Left rear door lock actuator
Left rear door module
Lock
Open
Pass mdl fuse 25 10a
Passenger door lock switch
Pwr wdo circuit breaker 57 30a
Rear fuse block
Remote control door lock receiver (below rear shelf)
Right rear door lock actuator
Right rear door module
Rrdr mdl fuse 18 10a
S302
S500
S602
S604
Sbi
Seats system
Serial data
Sib
Sp200
Sp201
Sp301
Sp302
Tan
Unlock
Unlock'

Fuel Door Lock Wiring Diagram for Buick LeSabre Custom 2003

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List of elements for Fuel Door Lock Wiring Diagram for Buick LeSabre Custom 2003:

Aldl fuse 4 10a
B12
Body fuse 26 15a
C2 a12
C2 b3
C3 e7 tan tan
Computer data lines system
D9 pnk
Data lines
F/tnk dr lock relay 47
F/tnk dr rel relay 50
Fuel door lock
Fuel door release
Fuel door release actuator
G302 (under rear seat)
Hot at all times
Pnk
Rear data integration lines module (under left rear seat)
Rear fuse block (under left rear seat)
S308
Splice pack sp302
Tan

POWER MIRRORS

Power Mirrors Wiring Diagram for Buick LeSabre Custom 2003

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List of elements for Power Mirrors Wiring Diagram for Buick LeSabre Custom 2003:

(body harn left side of vehicle, near left power seat breakout)
(except pontiac)
(left front door trim harn, in left front door) s500
(on lower left corner of trunk, forward of tail lamp)
(on lower left front "a" pillar)
(on lower right front "a" pillar)
A7 c3
Automatic day
B1 c3
Battery (b+)
Battery b+
Bus interface
Computer data lines system
D3 c3
Defogger system (heated mirror)
Down ctrl
Driver door lock switch
Driver door module (ddm)
Driver door switch asembly
Drv mdl fuse 10a
E2 c3
Ec feed
Ec rerurn
Ec return
Exterior lights system
F2 c3
Front passenger door module (fpdm)
G200
G201
G402
Gnd
Ground
Heating element
Horizontal motor
Hot at all times
Hot in on
Ign 3 rr fuse 10a
Ign 3 voltage
Inside rear view mirror
Interior lights system
Keypad led
Keypad pwr
Keypad signal
L mirror input
Left
Left ctrl
Left mirror
Left rear door module
Mirror dn input
Mirror l input
Mirror r input
Mirror up input
Nca
Night input sig
Pass mdl fuse 10a
Pnk
Pwr wdo circuit breaker 30a
R mirror input
Rear fuse block (under left rear seat)
Reverse lamp relay
Reverse sig
Right
Right ctrl
Right mirror
Right rear door module
S302
S344
Serial data
Up ctrl
Vehicle interface unit (viu) (2001 only)
Vertical motor

POWER SEATS

6-Way & Recliner Power Seat Wiring Diagram for Buick LeSabre Custom 2003

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List of elements for 6-Way & Recliner Power Seat Wiring Diagram for Buick LeSabre Custom 2003:

(bonneville) (le sabre)
Driver seat adjuster switch
Driver seat front vertical motor
Driver seat horizontal motor
Driver seat rear vertical motor
Driver seat recline motor
E12
Entire seat backward
Entire seat forward
F12
Front passenger seat adjuster switch
Front passenger seat front vertical motor
Front passenger seat horizontal motor
Front passenger seat rear vertical motor
Front passenger seat recline motor
Front vertical down
Front vertical up
G301 (under right front seat, on forward crossmember)
Hot at all times
Nca
Pwr seat circuit breaker 30a
Rear fuse block
Rear vertical down
Rear vertical up
Recline backward
Recline forward
S321 s324 (w/ heated seats)
S322 (w/ heated seats)
S323 (bonneville)
S325 (bonneville)
Slice pack sp301
Tan

6-Way Power Seat Wiring Diagram for Buick LeSabre Custom 2003

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List of elements for 6-Way Power Seat Wiring Diagram for Buick LeSabre Custom 2003:

Driver seat adjuster switch
Driver seat front vertical motor
Driver seat horizontal motor
Driver seat rear vertical motor
E12
Entire seat backward
Entire seat forward
F12
Front passenger seat adjuster switch
Front passenger seat front vertical motor
Front passenger seat rear horizontal motor
Front passenger seat rear vertical motor
Front vertical down
Front vertical up
G301 (under right front seat, on forward crossmember)
Hot at all times
Pwr seat circuit breaker 30a
Rear fuse block
Rear vertical down
Rear vertical up
S322 (le sabre w/ heated seats)
S323 (bonneville)
S324 (le sabre w/ heated seats)
Splice pack sp301
Tan

Heated Seats Wiring Diagram for Buick LeSabre Custom 2003

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List of elements for Heated Seats Wiring Diagram for Buick LeSabre Custom 2003:

A12
B12
C11
Cntrld gnd
Computer data links system
Data
Door locks system
Driver door module
Driver heated seat back element
Driver heated seat cushion element
Driver heated seat module
Driver heated seat switch
Front passenger door module
Front passenger heated seat back element
Front passenger heated seat cushion element
Front passenger heated seat module
Front passenger heated seat switch
G301 (under right front seat, on forward crossmember)
Gnd
Ground
Heater cntrl
Heating element
Hi led
Hot at all times
Hot in on
Htdstlf fuse 10a
Htdstrf fuse 10a
Ign
Ign 3 rr fuse 10a
Interior lights system
Lo led
Nca
Off
Off sw
Pnk
Rear fuse block
Rear integration module (rim) (behind upper left rear seat cushion)
Red
S304
S321
S322
S500
S604
Simple bus
Splice pack sp301
Status output
Sw signal
Temp sense
Temp senser
Thermistor

Recliner Wiring Diagram for Buick LeSabre Custom 2003

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List of elements for Recliner Wiring Diagram for Buick LeSabre Custom 2003:

Back
Driver seat recline motor
Driver seat recline switch
E12
F12
Forward
Front passenger recline motor
Front passenger seat recline switch
G301 (under right front seat, on forward crossmember)
Hot at all times
Nca
Pwr seat circuit breaker 30a
Rear fuse block
S315
S316
Splice pack g301

POWER TOP/SUNROOF

Power Top/Sunroof Wiring Diagram for Buick LeSabre Custom 2003

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List of elements for Power Top/Sunroof Wiring Diagram for Buick LeSabre Custom 2003:

A buick
Close
Control
D10
Express
Express inp
G401 (lower right corner of trunk)
Ground
Hot at all times
Limit sw
Limit switch
Motor ctrl
Open
Pontiac b
Rap
Rap fuse 20a
Rap relay
Rear fuse block (under left rear seat)
Rear integration module (behind upper left rear seat cushion)
Red
Slide input
Sun roof module (rear of glass assembly, above headliner)
Sun roof motor (rear of glass assembly, above headliner)
Sun roof switch (in overhead console)
Vent input

POWER WINDOWS

Power Windows Wiring Diagram for Buick LeSabre Custom 2003

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List of elements for Power Windows Wiring Diagram for Buick LeSabre Custom 2003:

(in body harness, left side of vehicle 14.5 cm (5.7 in) from left power seat breakout) s302
Battery
Data
Door locks system
Down
Down input
Down signal
Driver door module (ddm) (in left front door behind trim panel, in upper right corner of door)
Driver door switch assembly (ddsa)
Driver window motor (in left front door)
Drvmdl fuse 10a
Express down
Express input
Front passenger door module (fpdm) (in right front door behind trim panel, in upper left corner of door)
Front passenger window motor (in right front door)
Front passenger window switch
G200 (left front corner of passenger compartment on left front door pillar)
G201 (lower right corner of passenger compartment on right front door pillar)
G301 (under right front seat, on forward crossmember)
G302 (under left side of rear seat)
Ground
Hot at all times
Illum
Interior lights system
Left front door) s500
Left front window
Left rear door module (lrdm) (in left rear door)
Left rear window
Left rear window motor (in left rear door)
Left rear window switch
Lockout input
Memory systems
Motor down
Motor up
Pass mdl fuse 10a
Pwr wdo circuit breaker 30a
Rear fuse block (under left rear seat)
Right front window
Right rear door module (rrdm) (in right rear door)
Right rear window
Right rear window motor (in right rear door)
Right rear window switch
Rrdr mdl fuse 10a
S602 (in right front door harness 10 cm (4 in) from door module connector breakout)
Serial data
Up input
Up signal
Window lockout
Window switches

RADIO

Radio Wiring Diagram for Buick LeSabre Custom 2003

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List of elements for Radio Wiring Diagram for Buick LeSabre Custom 2003:

(lower front corner of passenger compt, on left front door pillar)
(under left front seat, on forward crossmember)
(w/cj2)
A10
A11
A12
A13
A14
A15
A16
Am/fm rear glass antenna
Ant in (sat)
Ant in (terr)
Antenna
Aud out -
Audio fuse 21 10a
Audio output
B10
B11
B12
B13
B14
B15
B16
Bare
Batt
Case gnd
Coax
Computer data lines system
Dash integration module (behind right side of dash) c2
Data
Digital radio antenna
Digital radio receiver
Drain wire
Enable
Fm comp sig
Fm front glass antenna
G200
G300
G405 (on lower left corner of rear compartment)
Gnd
Ground
Hot at all times
Ill
Inflatable restraint steering wheel module coil
Interior lights system
Left front door speaker
Left front tweeter
Left rear speaker
Left side steering wheel controls
Lf aud +
Lf spkr
Lr spkr
Lt audio sig
Nca
Radio
Radio antenna module (on center rear of headliner)
Rear fuse block (under left rear seat)
Rf spkr
Right front door speaker
Right front tweeter
Right rear speaker
Right side steering wheel controls
Rr spkr
Rt aud +
Rt audio sig
S208
S210
Sdar fuse 15 5a
Serial data
Splice pack sp402
Steering column fuse holder
Sw1
Sw2
Sw3
Sw4
Sw5
Sw6
Sw7
Sw8
Switch fuse 2a
Tan

SHIFT INTERLOCK

Shift Interlock Wiring Diagram for Buick LeSabre Custom 2003

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List of elements for Shift Interlock Wiring Diagram for Buick LeSabre Custom 2003:

(pontiac) (buick)
1995 vftc c
A/t shif tlock control solenoid
A/t shift lock control solenoid
A12
Automatic transaxle
Automatic transaxle internal mode switch
B12
C100
C2 b b
C2 c1
Computer data lines
Data line
G105 (front of engine)
G200 (on left front door pillar)
G201 (on right front door pillar)
Hot at all times
Hot in on
Park relay
Park relay control
Pontiac w/center console
Pontiac w/o center console/ buick
Powertrain control module (in air cleaner housing)
Prk/rev fuse 10a
Rear fuse block (under left rear seat)
Rear integration module (behind upper left rear seat cushion)
S225
S228
Splice pack sp105
Splice pack sp200
Splice pack sp201
Stoplamp switch (buick) (on brake pedal bracket)
Stoplamp/a/t shift lock control switch (pontiac) (on brake pedal bracket)

STARTING/CHARGING

Charging Wiring Diagram for Buick LeSabre Custom 2003

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List of elements for Charging Wiring Diagram for Buick LeSabre Custom 2003:

(in i/p harn, 6.5 cm from ipm breakout)
(not used) a
(under right side rear seat) g305
A11
A12
B12
Battery
Battery volt indicator
Battery volts high
Battery volts low
Check charge system
Dash integration module (dim) (behind right side of dash, under sound insulator)
Dim fuse 10a
Driver information center
E11
Gen field duty cycle sig
Gen turn on sig
Generator l
Hot at all times
Instrument panel cluster
Powertrain control module (pcm) (in air cleaner housing)
Rear fuse block (under left rear seat)
Red
S202
S217 (in body harn, 24 cm from p100)
Serial class 2 data
Serial data class 2
Starter solenoid
System voltage measurement
Underhood fuse block (right front side of engine compartment)

Starting Wiring Diagram for Buick LeSabre Custom 2003

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List of elements for Starting Wiring Diagram for Buick LeSabre Custom 2003:

Acc
Battery
Computer data lines system
G305 (under right side rear seat)
Ground distribution system (dash integration module (dim))
Hold in coil
Hot in run & start
Ign crank sense
Ign sw fuse 15a
Ignition swtch
Lock
Nca
Pcm batt fuse 10a
Power distribution system
Powertrain control module (pcm) (in air cleaner housing)
Pull in coil
Rear fuse block (under left rear seat)
Run
Serial data class 2
Start
Start 1 relay
Start circuit breaker 30a
Starter ctrl
Starter motor
Starter solenoid
Starting/ charging system (charging circuit)
Underhood fuse block (right front side of engine compartment)
Unlock

SUPPLEMENTAL RESTRAINTS

Supplemental Restraints Wiring Diagram for Buick LeSabre Custom 2003

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List of elements for Supplemental Restraints Wiring Diagram for Buick LeSabre Custom 2003:

A10
A11
A12
A13
A14
A15
A16
A17
A18
Air bag indicator
Case ground
Class 2 serial data
Computer data lines system
Dash integration module (dim) (behind right side of dash, under sound insulator)
Data link connector (dlc) (partial) (under lower left side of dash)
Forward discriminating sensor
G303 (under right front seat)
Ground
High control
Hot in run & start
Ignition
Inflatable restraint i/p module
Inflatable restraint sensing & diagnostic module (sdm) (under rear of center console, mounted to floor pan)
Inflatable restraint side impact module- left front
Inflatable restraint side impact module- right front
Inflatable restraint steering wheel module
Inflatable restraint steering wheel module coil
Instrument panel cluster (ipc)
Left front seat belt switch (closed w/seat belt unbuckled) (in seat belt assembly, near floor)
Left inflatable restraint side impact sensor (sis) (at base of left "b" pillar, behind trim panel)
Low control
Nca
Pnk
Rear fuse block (under left rear seat)
Right inflatable restraint side impact sensor (sis) (at base of right "b" pillar, behind trim panel)
S202 (in i/p harn, 24cm from ipm breakout)
Seat belt sw left
Seat belt sw low ref
Sensor low reference
Sensor signal
Shorting bar
Signal
Sir fuse 15a
Solid state
Tan
Voltage

TRANSMISSION

3.8L VIN K

3.8L VIN K, A/T Wiring Diagram for Buick LeSabre Custom 2003

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List of elements for 3.8L VIN K, A/T Wiring Diagram for Buick LeSabre Custom 2003:

(rear of engine, near thermostat housing) engine coolant temperature (ect) sensor
(right front of transaxle, below power steering pump) vehicle speed sensor (vss)
1-2 shift sol
2-3 shift sol
5 volt ref
A/t fluid temp
A/t iss low
A/t speed sens
Acc
Automatic transaxle
Automatic transaxle fluid temperature sensor
Automatic transaxle input shaft speed sensor
Automatic transaxle internal mode switch
Automatic transmission fluid pressure manual valve position switch
B c
Battery
Bonneville
Bonneville le sabre
Computer data lines system
Cruise control system
E e
Ect sensor gnd
Ect sensor in
G105 (below ignition control module)
Hot at all times
Hot in run or start
Ign
Ign 1
Ign 1 fuse 10a
Ign1 fuse 12 10a
Ignition
Ignition 1
Ignition switch (pigtailed for le sabre)
Instrument cluster
Instrument cluster, turn signal switch
Le sabre
Lock
Logic
Malfunc-
Malfunction indicator lamp
Mil control
Off
Pcm batt fuse 10a
Pcm ground
Pcm ign fuse 10a
Pnk
Powertrain control module (pcm) (near air cleaner housing)
Press sol high
Press sol low
Pressure control sol
Rear fuse block
Red
Run
S212 (or s208)
S216
Sensor return
Serial data
Shift sol a
Shift sol b
Start
Stop lamp switch (near brake pedal)
Tcc pwm sol
Tcc rel switch
Tcc release sw
Tcc sw
Tcc/ cruise switch
Throttle position (tp) sensor (on throttle body assembly)
Tion ind lamp
Tp sensor gnd
Tp sensor in
Trans fuse 10a
Trans sw a
Trans sw b
Trans sw c
Trans sw p
Under- hood fuse block
Vss hi (signal)
Vss lo (ground)

TRUNK, TAILGATE, FUEL DOOR

Trunk Release Wiring Diagram for Buick LeSabre Custom 2003

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List of elements for Trunk Release Wiring Diagram for Buick LeSabre Custom 2003:

A10 c3
A9 c2
Aldl fuse 10a
B nca
B12
Body fuse 15a
C1 c2
Class ii data
Computer data lines system
Driver's door module (in left front door)
Driver's door switch assembly
G200 (left front corner of passenger compt, on left front door pillar)
G401 (lower right corner of trunk, forward of tail lamp)
Ground
Hot at all times
Rear compartment lid release actuator (on center rear of luggage compt)
Rear compartment lid release switch
Rear fuse block (under left rear seat)
Rear integration module (rim) (behind upper left rear seat cushion)
Rr compt lid release actuator control
S308
S500 (left front door trim harness, in left front door)
Simple bus
Sp200
Sp401
Sw input
Tan/
Trk/ rel relay
W/ universal garage door opener

WARNING SYSTEMS

Warning Systems Wiring Diagram for Buick LeSabre Custom 2003

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List of elements for Warning Systems Wiring Diagram for Buick LeSabre Custom 2003:

(in i/p harness, 30.5 cm from i/p integration module breakout) s251
A11
A12
A14
A15
A16
Class 2 serial data
Computer data lines system
Dash integration module (dim) (behind right side of dash, under sound insulator)
Door open
Driver door lock actuator
Driver's door module (ddm)
G200 (on left front door pillar)
Ground
Headlamp switch
Heater & a/c control
Ignition key alarm switch (closed w/key in ignition)
Inflatable restraint sensing & diagnostic module (sdm) (under rear of center console, mounted to floor pan)
Instrument panel cluster (ipc)
Instrument panel integration module (ipm) (behind left side of dash)
Key in ignition sw
Key in signal
Left front seat belt switch (closed w/seat belt unbuckled)
Left seat belt sw
Left turn
Lf door open switch signal
Low reference
Nca
Off
Park
Park brake sw sig
Park lamp switch
Park lamp switch on signal
Powertrain control module (pcm) (in air cleaner housing)
Radio
Right turn
S208
S226
S252 (in i/p harness, 37 cm from i/p integration module breakout)
Tan
Turn signal/ hazard flasher module (behind left side of instrument panel, above data link connector)
W/automatic air conditioning
W/manual air conditioning

WIPER/WASHER

Wiper/Washer Wiring Diagram for Buick LeSabre Custom 2003

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List of elements for Wiper/Washer Wiring Diagram for Buick LeSabre Custom 2003:

150k
24,000 ohms
270k
39k
680k
82k
Accy fuse 15a
C329
Dash integration module (dim) (behind right side of dash, under sound insulator)
G103 (mounted to inner body panel, forward of underhood fuse block)
G106 (near left strut tower, on frame rail)
G402 (on lower left corner of trunk forward of tail lamp)
Ground
Headlamps on w/wipers input
High
High speed input
Hot in run & accessory
If equipped
Ignition
Low
Low min
Max
Min
Mist
Nca
Off
Off max
Outside moisture sensor (if equipped) (above inside rearview mirror)
Rain sense ctrl
Rain sense input
Red
S334
Underhood fuse block (right front side of engine compartment)
Wash
Washer switch
Windshield washer pump motor (in bottom of windshield washer reservoir)
Windshield wiper motor (behind left front strut tower)
Windshield wiper/washer switch
Wiper speed sig
Wiper switch
Wsw fuse 30a