All Wiring Diagrams for Buick Lucerne CXS 2007 model

AIR CONDITIONING

Automatic A/C Wiring Diagram (1 of 2) for Buick Lucerne CXS 2007

List of elements for Automatic A/C Wiring Diagram (1 of 2) for Buick Lucerne CXS 2007:

(approximately 7 cm (3 in) from branch for hazard lamp switch) s202
(in engine harness, approximately 7 cm (3 in) from branch for throttle body assembly)
(in i/p harness, approximately 41 cm (16 in) from branch for hazard lamp switch) s210
(lower left rear of engine)
(under driver's seat) g300
(under right front passenger's seat) g304
3.8l
4.6l
5 volt ref
A/c compressor clutch (on a/c compressor)
Air temp motor ctrl
Ambient air temp sens sig
Ambient air temperature sensor (on center front of engine compt, on hood latch brace)
Ambient light sensor sig
Backlight lamp ctrl
Batt pos vol
Batt pos volt
Blower motor (behind right side of dash)
Blower motor control module (near blower motor)
Body control module (bcm) (right of glove box)
Cold
Computer data lines system
Defogger system
Drv air temp dr ctrl a
Drv air temp dr ctrl b
Drv air temp dr pos sig
Engine coolant hot
Evap low temp sens sig
Evaporator temperature sensor (left of blower motor)
G112
G115
G300 (under driver's seat)
Gmlan serial data
Gnd
Hot
Hot at all times
Hvac blwr fuse 40a
Hvac control module
I/p harn mdl fuse 10a
Ign 1 volt
Inside air temp sens sig
Inside air temperature sensor (under left side of dash, left of steering column)
Interior lights system
L sunload sens sig
Led dimming sig
Left sunload sensor signal
Logic
Low ref
Low reference
Low speed gmlan serial data
Lower mode dr ctrl b
Lower mode dr pos sig
Message center
Message req
Mode door control a
Pass air temp dr ctrl b
Pass air temp dr pos
Pnk
Power distribution system
R sunload sens sig
Radio
Rear defog rly ctrl
Rear fuse block (below left side of rear seat)
Recir dr ctrl a
Recir dr ctrl b
Recir valve sol sig
Recirculation actuator (behind right side of dash, right of blower motor)
Right sunload sensor signal
S106
S200 (approximately 6 cm (2 in) from branch for hvac module)
S203 (approximately 36 cm (14 in) from breakout for hvac module)
S387
Solid state
Speed ctrl
Sunload twilight sensor (top center of dash)
Tan

Automatic A/C Wiring Diagram (2 of 2) for Buick Lucerne CXS 2007

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List of elements for Automatic A/C Wiring Diagram (2 of 2) for Buick Lucerne CXS 2007:

(3.8l)
(3.8l: left front of engine compt, inside air cleaner housing) (4.6l: left side of engine compt) engine control module (ecm) powertrain control module (pcm)
(4.6l)
(in hvac harness, between evaporator temperature sensor & c202) s227
(in hvac harness, between hvac control module & mode motors)
(or tan)
3.8l
4.6l
5v ref 1
A/c fuse 10a
A/c refrigerant pressure sensor (near a/c compressor, on hose assembly)
A/c relay
Clutch rly ctrl
Cold
Computer data lines system
Cool/ fan 1 relay
Cool/ fan 2 relay
Cool/ fan relay
Def
Driver air temperature actuator (left side of hvac module)
Dry air temp signal
Ect sens sig
Engine coolant temperature (ect) sensor (3.8l: left rear of engine) (4.6l: right rear of engine)
Fan 1 fuse 30a
Fan 2 fuse 30a
Front passenger air temperature actuator (right side of hvac module)
G104 (right front corner of engine compt)
Gmlan serial data +
Gmlan serial data -
Hi speed rly ctrl
Hot
Hot at all times
Hot in run or start
Hot w/ run/crnk relay energized
Hvac/ ipc fuse 10a
Left cooling fan (on left rear side of radiator)
Low ref
Low speed rly ctrl
Mode actuator (on right side of hvac module)
Mode valve signal
Pass air temp signal
Pnk
Press sens sig
Right cooling fan (on right rear side of radiator)
S226
Tan
Underhood fuse block (on right front of engine compt, forward of strut tower)
Vent

Compressor Wiring Diagram for Buick Lucerne CXS 2007

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List of elements for Compressor Wiring Diagram for Buick Lucerne CXS 2007:

(in engine harness, approximately 7 cm (3 in) from branch for throttle body assembly) s106
(lower left rear of engine)
3.8l
4.6l
4.6l 3.8l
5 volt ref 1
A/c compressor clutch (on a/c compressor)
A/c fuse 10a
A/c refrigerant pressure sensor (near a/c compressor, on hose assembly)
A/c relay
Clutch rly ctrl
Computer data lines system
G112
G115
Gmlan serial data +
Gmlan serial data -
Hot at all times
Hot in run or start
Low ref
Powertrain control module (pcm) (3.8l) engine control module (ecm) (4.6l) (3.8l: left front of engine compt, inside air cleaner housing) (4.6l: left side of engine compt)
Sensor signal
Tan
Underhood fuse block (on right front of engine compt, forward of strut tower)

Manual A/C Wiring Diagram (1 of 2) for Buick Lucerne CXS 2007

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List of elements for Manual A/C Wiring Diagram (1 of 2) for Buick Lucerne CXS 2007:

(approximately 36 cm (14 in) from breakout for hvac module)
(in hvac harness, between evaporator temperature sensor & c202)
(in hvac harness, between hvac control module & mode motors)
(in i/p harness, approximately 41 cm (16 in) from branch for hazard lamp switch) s210
(under right front passenger's seat) g304
5 volt ref
A/c compressor clutch (on a/c compressor)
Air temp dr ctrl b
Air temp dr pos sig
Air temperature actuator (right side of hvac module)
Ambient air temp sens sig
Ambient air temperature sensor (on center front of engine compt, on hood latch brace)
Backlight lamp ctrl
Batt pos vol
Batt pos volt
Blower motor (behind right side of dash)
Blower motor control module (near blower motor)
Cold
Computer data lines system
Def
Defogger system
Driver air temp signal
Drv air temp dr ctrl a
Evap low temp sens sig
Evap temperature sensor (left of blower motor)
G112 (lower left rear of engine)
G300 (under driver's seat)
Gnd
Hot
Hot at all times
Hvac blwr fuse
Hvac control module
I/p harn mdl fuse 10a
Ign 1 volt
Interior lights system
Led dimming sig
Logic
Low mode dr pos sig
Low ref
Low speed gmlan serial data
Lower mode dr ctrl b
Mode actuator (on right side of hvac module)
Mode dr ctrl a
Mode valve signal
Pnk
Power distribution system
Rear defog rly ctrl
Rear fuse block (below left side of rear seat)
Recir door a ctrl
Recir door b ctrl
Recirculation actuator (behind right side of dash, right of blower motor)
S200 (approximately 6 cm (2 in) from branch for hvac module)
S203
S226
S227
S387
Speed ctrl
Tan
Vent

Manual A/C Wiring Diagram (2 of 2) for Buick Lucerne CXS 2007

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List of elements for Manual A/C Wiring Diagram (2 of 2) for Buick Lucerne CXS 2007:

5v ref 1
A/c fuse 10a
A/c refrigerant pressure sensor (near a/c compressor, on hose assembly)
A/c relay
Clutch rly ctrl
Computer data lines system
Cool/ fan 1 relay
Cool/ fan 2 relay
Cool/ fan relay
Ect sens sig
Engine coolant temperature (ect) sensor (left rear of engine)
Fan 1 fuse 30a
Fan 2 fuse 30a
G104 (right front corner of engine compt)
Gmlan serial data +
Gmlan serial data -
Hi speed rly ctrl
Hot at all times
Hot in run or start
Hot w/ run/crnk relay energized
Hvac/ ipc fuse 10a
Left cooling fan (on left rear side of radiator)
Low ref
Low speed rly ctrl
Pnk
Powertrain control module (pcm) (left front of engine compt, inside air cleaner housing)
Press sens sig
Right cooling fan (on right rear side of radiator)
S229 (in ip harness, between c201 & c202)
Tan
Underhood fuse block (on right front of engine compt, forward of strut tower)

ANTI-LOCK BRAKES

Anti-lock Brakes Wiring Diagram (1 of 2) for Buick Lucerne CXS 2007

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List of elements for Anti-lock Brakes Wiring Diagram (1 of 2) for Buick Lucerne CXS 2007:

(base of steering column) (w/ active brake control) steering angle sensor
(left front corner of engine compt) electronic brake control module (ebcm)
(not used)
(on floor pan, left of center console) (w/ active brake control) yaw & lateral acceleration sensor
5v ref
Abs 1 fuse 50a
Abs 2 fuse 60a
Abs ind
Batt pos volt
Brake pressure modulator valve (bpmv)
Computer data lines system
Electronic power steering system
Erometer sig long accel-
G114 (lower left rear of engine)
Gmlan (bcm)
Gmlan (ebcm)
Ground
High effort ctrl
Hot at all times
Hot w/ run/crnk relay energized
Hvac fuse 10a
Ign
Ign 1 volt
Instrument panel cluster (ipc)
Lateral accel- erometer sig
Lateral accelerometer sig
Left front inlet
Left front isolation
Left front outlet
Left front prime
Left rear inlet
Left rear outlet
Logic
Long accelerometer signal
Low effort ctrl
Low ref
Low reference
Motor ctrl
Pnk
Position signal a
Position signal b
Power distribution system
Radio
Red
Right front inlet
Right front isolation
Right front outlet
Right front prime
Right rear inlet
Right rear outlet
Sensor signal
Serial data
Serial data (+)
Serial data (-)
Serial data wake up
Sol valve ctrl
Solenoid valves
Stability control ind
Tan
Underhood fuse block (on right front of engine compt, forward of strut tower)
Vehicle speed signal
Vss
Yaw rate diagnostic
Yaw rate sensor sig

Anti-lock Brakes Wiring Diagram (2 of 2) for Buick Lucerne CXS 2007

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List of elements for Anti-lock Brakes Wiring Diagram (2 of 2) for Buick Lucerne CXS 2007:

(in engine harness, approximately 47 cm (19 in) from right front wheel speed sensor) s114
(in engine harness, approximately 53 cm (21 in) from left front wheel speed sensor) s113
(in engine harness, approximately 53 cm (21 in) from right front wheel speed sensor) s116
(under right front passenger's seat) (w/o individual seat) g304
(w/ individual seat) s204
Body control module (bcm) (right of glove box)
Brake pedal position sensor (top of brake pedal assembly)
Computer data lines system
G300 (w/ individual seat) (under driver's seat)
Interior lights system
Left front wheel speed sensor (wss) (on left front brake assembly, on back of hub)
Left rear wheel speed sensor (wss) (on left rear brake assembly, on back of hub)
Low reference
Right front wheel speed sensor (wss) (on right front brake assembly, on back of hub)
Right rear wheel speed sensor (wss) (on right rear brake assembly, on back of hub)
S115 (in engine harness, approximately 59 cm (24 in) from left front wheel speed sensor)
S383 (w/o individual seat)
Sensor signal
Serial data
Serial data (+)
Serial data (-)
Serial data wake up
Supp volt
Switch signal
Tan
Traction control off (w/o individual seat)
Traction control switch
W/ individual seat
W/o individual seat

ANTI-THEFT

Forced Entry Wiring Diagram for Buick Lucerne CXS 2007

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List of elements for Forced Entry Wiring Diagram for Buick Lucerne CXS 2007:

(in body harness, approximately 9 cm (3 in) from branch for c314) s343
(under center of rear package shelf) remote control door lock receiver (rcdlr)
(under left rear seat) g301
Battery
Body control module (bcm) (right of glove box)
Body harn mdl fuse f35 10a
Computer data lines system
Ddm fuse f24 15a
Dr lck relay r9
Dr lock act ctrl
Dr mdl/ pwr wndw circuit breaker cb3 25a
Dr unlck relay r10
Dr unlock act ctrl
Driver door latch assembly (rear of driver's door)
Driver door module (ddm)
Drv dr key sw sig
Exterior lights system
Front passenger door latch assembly (rear of front passenger's door)
Front passenger door module (fpdm)
G104 (right front corner of engine compt)
G300 (under driver's seat)
G301 (under left rear seat)
G304 (under right front passenger's seat)
G306 (at left "c" pillar)
Gmlan serial data
Ground
Hood ajar sw sig
Hood ajar switch (w/ remote keyless entry) (center front of engine compt)
Hood closed sw sig
Horn rly ctrl
Horns system
Hot at all times
Ign
Instrument panel cluster (ipc)
Keyless entry antenna
Keyless entry antenna sig
Left rear door latch assembly (rear of left rear door)
Lf dr ajar sw sig
Lf dr open sw sig
Lf dr sw low ref
Logic
Low spd gmlan ser data
Lr dr ajar sw sig
Lr dr lock mtr ctrl
Lr dr open sw sig
Nca
Park lamp rly ctrl
Pdm fuse f25 15a
Rear dr lck fuse f19 20a
Rear fuse block (below left side of rear seat)
Rf dr ajar sw sig
Rf dr open sw sig
Rf dr sw low ref
Right rear door latch assembly (rear of right rear door)
Rr dr ajar sw sig
Rr dr open mtr ctrl
S301
S337
S385
S700
S800
Security ind
Serial data
Tan
Tan/ red
Tan/red
W/ theft deterrent system
W/o theft deterrent system

Pass-Key Wiring Diagram for Buick Lucerne CXS 2007

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List of elements for Pass-Key Wiring Diagram for Buick Lucerne CXS 2007:

Acc
Acc volt
Battery
Computer data lines system
G300 (under driver's seat)
Ground
Hot at all times
I/p harn mdl fuse f31 10a
Ign
Ignition key
Ignition switch
Instrument panel cluster (ipc)
Low spd gmlan ser data
Off
Power distribution system
Reader/ exciter
Rear fuse block (below left side of rear seat)
Run
S201
S204
Security ind
Serial data
Start
Theft deterrent module (tdm) (in steering column)
Transponder

BODY CONTROL MODULES

Body Control Modules Wiring Diagram (1 of 3) for Buick Lucerne CXS 2007

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List of elements for Body Control Modules Wiring Diagram (1 of 3) for Buick Lucerne CXS 2007:

12v reference
Acc wakeup serial data
Anti-lock brakes system
Backlight lamp control
Battery
Battery current sensor
Battery pos voltage
Body control module (bcm) (right of glove box)
Chmsl/ back-up fuse f18 10a
Computer data lines system
Cruise control system
Cruise ctr ind dimming sig
Door locks system
Drl relay ctrl
Exterior lights system
Fog lamp relay ctrl
Front fog lamp sw sig
G303 (below right side of rear seat)
G304 (under right front passenger's seat)
Ground
Headlamp high beam rly
Headlights system
Hi gmlan data bus (+)
Hi gmlan data bus (-)
Hi gmlan serial data up
Hood ajar switch sig
Hot at all times
Interior lights system
Led dimming signal
Left lamp relay ctrl
Low gmlan serial data
Low reference
Lt trn/ sig fuse f15 15a
Out moisture sns sig 1
Out moisture sns sig 2
Pnk
Power distribution system
R lamp relay ctrl
Rear fuse block (below left side of rear seat)
Rf turn sig lamp sply
Rr trn/ sig fuse f16 15a
Run/crank ign 1 volt
S206
Tan
Tan/pnk
Washer relay ctrl
Wiper mtr park sw sig
Wiper/washer system

Body Control Modules Wiring Diagram (2 of 3) for Buick Lucerne CXS 2007

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List of elements for Body Control Modules Wiring Diagram (2 of 3) for Buick Lucerne CXS 2007:

12v reference
5v ref
Accessory volt
Ambient light sns sig
Anti-lock brakes system
Battery pos voltage
Body control module (bcm) (right of glove box)
Column radio ctrl signal
Courtesy lamp ctrl
Courtesy lamp sw on sig
Cruise control system
Exterior lights system
Flash to pass sw sig
Ground
Hazard sw sig
Headlamp sw hi beam sig
Headlamp sw off sig
Headlights system
Ignition 1 voltage
Interior lights system
Left turn sig sw sig
Off/run crank voltage
Park lamp sw on sig
Pnk
Power distribution system
Remote radio ctrl acc
Right turn sig sw sig
Set/coast resume/accel
Shift interlock system
Shift select sw park sig
Tan
Track control sw sig
Trunk release ctrl
Trunk, tailgate, fuel doors system
Washer sw sig
Wiper sw high sig
Wiper sw low sig
Wiper/washer system

Body Control Modules Wiring Diagram (3 of 3) for Buick Lucerne CXS 2007

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List of elements for Body Control Modules Wiring Diagram (3 of 3) for Buick Lucerne CXS 2007:

Backlight lamp control
Body control module (bcm) (right of glove box)
Computer data lines system
Courtesy lamp ctrl
Current sensor sig
Current sns sply volt
Door locks system
Exterior lights system
Headlights system
Hi speed relay ctrl
Hood closed sw sig
Horn relay ctrl
Horns system
Interior lights system
Lamp rly coil sply volt
Led dimming sig
Lf turn sig sply volt
Low beam relay ctrl
Low gmlan serial data
Lr door ajar sw sig
Lr door lock motor ctrl
Lr door open sw sig
Lr stop/turn lamp sply
Master sw lockout sig
Master sw lr down sig
Master sw lr up sig
Master sw rr down sig
Master sw rr lockout
Master sw rr up sig
Park brake switch (on top of park brake assembly)
Park brake switch sig
Park lamp relay control
Power distribution system
Power windows system
Rap relay coil sply volt
Rr door ajar sw sig
Rr door lock motor ctrl
Rr stop/turn lamp sply
Run relay coil ctrl
Sensor low reference
Starting/charging system
Stop lamp sw sig
Tan
Trunk ajar sw sig
Trunk release relay ctrl
Trunk, tailgate, fuel doors system
Wiper relay control
Wiper/washer system

COMPUTER DATA LINES

Computer Data Lines Wiring Diagram (1 of 2) for Buick Lucerne CXS 2007

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List of elements for Computer Data Lines Wiring Diagram (1 of 2) for Buick Lucerne CXS 2007:

(in engine harness, approximately 13 cm (5 in) from breakout for c138) s104
(left front of engine compartment, inside air cleaner housing)
(left rear of engine compartment)
(under center console) inflatable restraint sensing & diagnostic module (sdm)
3.8l
4.6l
Acc wake up data
Amplifier (mounted to left rear of rear seat)
Automatic level control module (w/ soft ride suspension system) (forward of left rear tire, on lower control arm) electronic suspension control (esc) module (w/ magnetic ride control) (behind right wheelwell)
D (not used)
Digital radio receiver (drr) (at left "d" pillar)
Electronic brake control module (ebcm) (left front corner of engine compt)
Engine control module (ecm) (left side of engine compt)
F (not used)
Hi spd serial data +
Hi spd serial data -
J (not used)
K (not used)
Low spd serial data
M (not used)
Object alarm module (on right rear wheelwell)
Powertrain control module (pcm)
Remote control door lock receiver (rcdlr) (under center of rear package shelf)
Serial data wake up
Sp300 (in passenger compt under rear seat near rear fuse block)
Tan
Transmission control module (tcm)
Underhood fuse block (on right front of engine compt, forward of strut tower)
Vehicle communication interface module (vcim) (on right front of trunk, attached to seat back brace)
W/ magnetic ride control
W/ soft ride suspension system

Computer Data Lines Wiring Diagram (2 of 2) for Buick Lucerne CXS 2007

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List of elements for Computer Data Lines Wiring Diagram (2 of 2) for Buick Lucerne CXS 2007:

(in i/p harness, approximately 12 cm (5 in) from data link connector) s208
Body control module (bcm) (right of glove box)
Data link connector (dlc) (under left side of dash)
Driver door module (ddm)
Front climate control seat module
Front passenger door module (fpdm)
G300 (under driver's seat)
Hi spd serial data +
Hi spd serial data -
Hot at all times
Hvac control module
I/p harn mdl fuse 31 10a
Inflatable restraint passenger presence system (pps) module (under front passenger's seat)
Instrument panel cluster (ipc)
Kw 2000 serial data
Low spd serial data
Memory seat module (msm) (on underside of driver's seat, on seat adjuster frame)
Radio
Rear fuse block (below left side of rear seat)
Run/acc
S200
S202
S203
S207 (in i/p harness, approximately 17 cm (7 in) from data link connector)
Serial data wake up
Tan
Theft deterrent module (tdm) (in steering column)

COOLING FAN

Cooling Fan Wiring Diagram for Buick Lucerne CXS 2007

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List of elements for Cooling Fan Wiring Diagram for Buick Lucerne CXS 2007:

(or tan)
3.8l
4.6l
Computer data lines system
Cool/ fan 1 relay
Cool/ fan 2 relay
Cool/ fan relay
Ect sens sig
Engine coolant temperature (ect) sensor (3.8l: left rear of engine) (4.6l: right rear of engine)
Fan 1 fuse 30a
Fan 2 fuse 30a
G104 (right front corner of engine compt)
Gmlan serial data +
Gmlan serial data -
Hi speed rly ctrl
Hot at all times
Hot in run or start
Left cooling fan (on left rear side of radiator)
Low ref
Low speed rly ctrl
Pnk
Powertrain control module (pcm) (3.8l) engine control module (ecm) (4.6l) (3.8l: left front of engine compt, inside air cleaner housing) (4.6l: left side of engine compt)
Right cooling fan (on right rear side of radiator)
Tan
Underhood fuse block (on right front of engine compt, forward of strut tower)

CRUISE CONTROL

Cruise Control Wiring Diagram for Buick Lucerne CXS 2007

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List of elements for Cruise Control Wiring Diagram for Buick Lucerne CXS 2007:

(3.8l)
(lower left rear of engine) g112
3.8l
4.6l
5 volt reference
5v ref
5v ref 2
Accelerator pedal position (app) sensor (top of accelerator pedal assembly)
Alert distance cruise speed ltd follow distance set speed set xx mph tight curve
App sensor 1 sig
App sensor 2 sig
Batt pos volt
Body control module (bcm) (right of glove box)
Brake pedal position sensor (top of brake pedal assembly)
Clean radar cruise cruise disengage cruise not ready cruise set xx mph service radar cruise
Computer data lines system
Cruise ind
Ecm/ tcm fuse 15a
Engine control module (ecm) (4.6l) (left side of engine compt)
Gmlan (ecm)
Gmlan serial data
Hot at all times
Hot w/ run/crnk relay energized
Hud message center
Hvac fuse 10a
Ign
Ign 1 vol
Ind dimming sig
Inflatable restraint steering wheel module coil (top of steering column)
Instrument panel cluster (ipc)
Left steering wheel control switch
Logic
Low ref
Low reference
Lt trn/ sig fuse 15a
Message center
Message request
Nca
On ind
Oss high sig
Oss low sig
Pnk
Pnk/red
Power distribution system
Powertrain control module (pcm) (left front of engine compt, inside air cleaner housing)
Rear fuse block (below left side of rear seat)
Res +
Res/acc sw sig
S100
S105
S220 (in steering column harness, between cruise control on/off switch & inflatable restraint steering wheel module coil)
Sens sig
Serial data +
Serial data -
Serial data bus +
Serial data bus -
Serial data prim
Serial data sec
Serial data wake up
Set -
Sig gnd
Sound systems
Tac mot ctrl 1
Tac mot ctrl 2
Tan
Throttle actuator control (tac) module (on throttle body assembly)
Throttle body assembly
Tp sensor 1 sig
Tp sensor 2 sig
Transmission control module (tcm) (4.6l)
Underhood fuse block (on right front of engine compt, forward of strut tower)
Vehicle speed sensor (vss) (in transmission)
Vss
Vss high sig
Vss low sig

DEFOGGERS

Defoggers Wiring Diagram for Buick Lucerne CXS 2007

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List of elements for Defoggers Wiring Diagram for Buick Lucerne CXS 2007:

Computer data lines system
Defogger ind
Driver door module (ddm)
Driver outside rearview mirror (in driver's door)
Front passenger door module (fpdm)
Front passenger outside rearview mirror (in front passenger's door)
G300 (under driver's seat)
G301 (under left rear seat)
G304 (under right front passenger's seat)
G306 (at left "c" pillar)
G307 (at right "c" pillar)
Ground
Heated mirror element
Hot at all times
Hvac control module
Logic
Low reference
Low spd gmlan serial data
Nca
Rear defog fuse jc2 40a
Rear defog relay r14
Rear defog rly ctrl
Rear defogger switch
Rear fuse block (below left side of rear seat)
Rear window defogger
S385
Sply voltage
Tan/pnk

ELECTRONIC POWER STEERING

Electronic Power Steering Wiring Diagram for Buick Lucerne CXS 2007

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List of elements for Electronic Power Steering Wiring Diagram for Buick Lucerne CXS 2007:

5v ref
Abs 1 fuse 50a
Abs 2 fuse 60a
Battery
Computer data lines system
Electronic brake control module (ebcm) (left front corner of engine compt)
G114 (lower left rear of engine)
Ground
High effort ctrl
Hot at all times
Low effort ctrl
Low ref
Pos sig a
Pos sig b
Red
Serial data (+)
Serial data (-)
Steering angle sensor (w/ active brake control) (base of steering column)
Tan
Underhood fuse block (on right front of engine compt, forward of strut tower)
Variable effort steering actuator (left rear of engine compt)

ELECTRONIC SUSPENSION

Electronic Air Suspension Wiring Diagram for Buick Lucerne CXS 2007

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List of elements for Electronic Air Suspension Wiring Diagram for Buick Lucerne CXS 2007:

(in body harness, approximately 65 cm (25 in) from right front strut actuator)
(right front wall of luggage compt)
Batt
Battery voltage
Computer data lines system
Electronic level control circuit
Electronic suspension control (esc) module (behind right wheelwell)
G403
Gmlan ser data +
Gmlan ser data -
Ground
Hot at all times
I/p harn mdl fuse 31 10a
Instrument panel cluster (ipc)
Ipc class 2
Left front suspension damper (on left front shock absorber assembly)
Left front suspension position sensor (on shock absorber assembly)
Left rear suspension damper (on left rear shock absorber assembly)
Left rear suspension position sensor (on left rear frame rail)
Lf damper ctrl
Lf damper low ref
Lf position sens
Lf snsr low ref
Lf voltage ref
Logic
Lr damper ctrl
Lr damper low ref
Lr position sens
Lr snsr low ref
Lr voltage ref
Message center
Message request
Mrtd mdl fuse 6 25a
Nca
Rear fuse block (below left side of rear seat)
Relay ctrl
Rf damper ctrl
Rf damper low ref
Rf position sens
Rf snsr low ref
Rf voltage ref
Right front suspension damper (on right front shock absorber assembly)
Right front suspension position sensor (on shock absorber assembly)
Right rear suspension damper (on right rear shock absorber assembly)
Right rear suspension position sensor (on right rear frame rail)
Rr damper ctrl
Rr damper low ref
Rr position sens
Rr snsr low ref
Rr voltage ref
S126 (in body harness, approximately 60 cm (24 in) from left front strut actuator)
S127 (in body harness, approximately 65 cm (25 in) from left front strut actuator)
S129
S200
Serial data
Service suspen sys
Solenoid ctrl
Tan

Electronic Level Control Wiring Diagram, with Electronic Suspension for Buick Lucerne CXS 2007

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List of elements for Electronic Level Control Wiring Diagram, with Electronic Suspension for Buick Lucerne CXS 2007:

(right front wall of luggage compt) g403
Automatic level control (alc) compressor (rear underside of vehicle)
Batt
Batt positive
Comprsr
Computer data lines system
Elc
Elc comprsr fuse jc3 30a
Elc mdl fuse 7 10a
Electronic suspension control (esc) module (behind right wheelwell)
G403 (right front wall of luggage compt)
Gnd
Hot at all times
I/p harn mdl fuse 31 10a
Instrument panel cluster (ipc)
Ipc class 2
Logic
Message center
Message request
Mrtd mdl fuse 6 25a
Nca
Rear fuse block (below left side of rear seat)
Relay 15
Relay ctrl
S200
S317
Serial data
Serial data +
Serial data -
Service suspen sys
Solenoid ctrl
Tan

Electronic Level Control Wiring Diagram, without Electronic Suspension for Buick Lucerne CXS 2007

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List of elements for Electronic Level Control Wiring Diagram, without Electronic Suspension for Buick Lucerne CXS 2007:

(in front of left rear tire, on lower control arm)
(left rear of luggage compt) g402
(right front wall of luggage compt) g403
Automatic level control (alc) compressor (rear underside of vehicle)
Automatic level control module
Batt
Batt positive
Comprsr
Computer data lines system
Elc
Elc comprsr fuse jc3 30a
Elc mdl fuse 7 10a
Gnd
Hot at all times
I/p harn mdl fuse 31 10a
Instrument panel cluster (ipc)
Ipc class 2
Logic
Message center
Message request
Nca
Rear fuse block (below left side of rear seat)
Relay 15
Relay ctrl
S200
S317
Serial data
Serial data +
Serial data -
Service suspen sys
Solenoid ctrl
Tan

ENGINE PERFORMANCE

3.8L VIN 2

3.8L VIN 2, Engine Performance Wiring Diagram (1 of 5) for Buick Lucerne CXS 2007

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List of elements for 3.8L VIN 2, Engine Performance Wiring Diagram (1 of 5) for Buick Lucerne CXS 2007:

signal ground
(1 in) from branch for c139)
(in engine harness, approximately 3 cm
(left side of oil pan)
(lower left rear of engine)
(on left side of engine, near starter)
(on top front of engine)
(on top right rear of engine)
(pins 62-72 not used)
5 volt ref 1
5 volt ref 2
Camshaft sig
Ect sensor sig
Egr pos sig
Egr sol high
Egr sol low
Engine coolant temperature sensor (left rear of engine)
Engine oil level switch
Engine oil pressure switch
Evap purge sol
Evaporative emission (evap) canister purge solenoid valve (on top right rear of engine)
Exhaust gas recirculation valve
Fuel inj 1 ctrl
Fuel inj 2 ctrl
Fuel inj 3 ctrl
Fuel inj 4 ctrl
Fuel inj 5 ctrl
Fuel inj 6 ctrl
Fuel injectors (1, 3 & 5: top left side of engine) (2, 4 & 6: top right side of engine)
G112
G112 (lower left rear of engine)
Gen field
Gen on sig
Heated oxygen sensor (ho2s) 1 (on right exhaust manifold)
Ho2s heater 1
Ho2s low ref
Ho2s ref volt
Ic timing ctrl
Ic timing sig
Knock sensor 1
Knock sensor 2
Knock sensor 2 (on right side of engine, below exhaust manifold)
Low eng speed
Low ref
Manifold absolute pressure sensor
Map sensor sig
Med eng speed
Nca
Oil level sw
Oil press sig
Pnk
Powertrain control module (left front of engine compt, inside air cleaner housing)
Relay control
S109
Starting/charging system
Tan
Tan/pnk
Uart data

3.8L VIN 2, Engine Performance Wiring Diagram (2 of 5) for Buick Lucerne CXS 2007

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List of elements for 3.8L VIN 2, Engine Performance Wiring Diagram (2 of 5) for Buick Lucerne CXS 2007:

(lower left rear of engine)
(not used)
(on left front of engine, next to crankshaft balancer) crankshaft position sensor
(on right front of engine)
12-volt ref
5 volt ref
Aap sensor 1
Accelerator pedal position sensor (top of accelerator pedal assembly)
App sensor 2
Body control module (right of glove box)
C110
Camshaft position sensor
Ckp sen 1 sig
Ckp sen 2 sig
Cmp sens sig
Cmp sig
Firing order 1-6-5-4-3-2
G112
G115 (lower left rear of engine)
Gnd
Ground
Hall effect sensor
Hot in run or start
Ic timing ctrl
Ic timing sig
Ign 1 volt
Ignition coils
Ignition control module (icm) (at left front of engine, under ignition coils)
Inj/coil fuse f24 15a
Inj/coil fuse f25 15a
Low ref
Low speed sig
Medium speed sig
P pnk
Pnk
Primary uart
S145
S164
Sec uart
Spark plugs
Stop lamp
Stop lamp switch signal
Throttle actuator control module (on throttle body assembly)
Trans ign 3 fuse f6 10a
Underhood fuse block (on right front of engine compt, forward of strut tower)
Vehicle spd
Volt ign 1

3.8L VIN 2, Engine Performance Wiring Diagram (3 of 5) for Buick Lucerne CXS 2007

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List of elements for 3.8L VIN 2, Engine Performance Wiring Diagram (3 of 5) for Buick Lucerne CXS 2007:

(not used)
1-2 shift solenoid valve
2-3 shift solenoid valve
A red
A/t fluid temperature sensor valve
A/t input shaft speed sensor
At iss low sig
Automatic transmission
Automatic transmission fluid pressure (tfp) manual valve position switch
Code a
Code b
Code c
G112 (lower left rear of engine)
Ho2s 2 sig high
Ho2s 2 sig low
Ho2s heater 2
Iat sensor sig
Interlock system
Lockout
Lockout sol ctrl
Low ref
Maf sensor sig
P/n
Parity
Pc sol hi ctrl
Pnk
Powertrain control module (left front of engine compt, inside air cleaner housing)
Pre sen sig
Pressure control solenoid valve
Red
S115 (approximately 59 cm (24 in) from left front wheel speed sensor) red
Shift
Shift sol
Sol low ctrl
Tan
Tan/pnk
Tcc release switch
Tcc sol
Tcc sw sig
Tft sensor sig
Torque converter clutch solenoid valve
Tr sig a
Tr sig b
Tr sig c
Tr sig p
Transmission internal mode switch
Vehicle speed sensor (in transmission)
Vss sig high
Vss sig low

3.8L VIN 2, Engine Performance Wiring Diagram (4 of 5) for Buick Lucerne CXS 2007

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List of elements for 3.8L VIN 2, Engine Performance Wiring Diagram (4 of 5) for Buick Lucerne CXS 2007:

(lower left rear of engine) g112
(lower left rear of engine) g114
(under vehicle, after catalytic converter)
Air pump fuse jc8 50a
Air pump relay r9
Air temperature sensor (left side of engine
Air/ sol relay r12
Air/sol fuse f27 15a
Compartment, in air intake tube)
Crnk relay r3
Ecm ign 3 fuse f5 10a
Ecm/crnk fuse f23 15a
G112 (lower left rear of engine)
Gnd
Heated oxygen sensor (ho2s) 2
Hot at all times
Hot in run & start
Hot in run or start
Iat sens sig
Low ref
Mass air flow/intake
Nca
Oxy pst fuse f21 15a
Pnk
Pwr trn fuse f22 15a
Pwr/train relay r4
Red
Relay r6
Rly ctrl
Run/ crank
S101
S108
Secondary air injection (air) check valve (w/ california pzev emission system)
Secondary air injection (air) pump (w/ california pzev emission system)
Sens sig maf
Tan
Tan d
Tan/pnk
Underhood fuse block (on right front of engine compt, forward of strut tower)

3.8L VIN 2, Engine Performance Wiring Diagram (5 of 5) for Buick Lucerne CXS 2007

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List of elements for 3.8L VIN 2, Engine Performance Wiring Diagram (5 of 5) for Buick Lucerne CXS 2007:

(approximately 5 cm (2 in) from breakout for electronic suspension control module) s316
(below rear of vehicle, on evap canister)
(right front wall of luggage compartment) g403
(under left rear seat)
5 volt ref 1
A/c clutch relay
A/c press sig
A/c refrigerant pressure sensor (near a/c compressor, on hose assembly)
Acc
Air conditioning system
Battery
Body control module (right of glove box)
Cnstr vent fuse f5 10a
Computer data lines system
Cooling fans system
Ecm/tcm fuse f28 15a
Evap vent sol
Evaporative emissions (evap) canister vent solenoid valve
Fuel level sig
Fuel pump & sender assembly
Fuel pump relay
Fuel tank press
Fuel tank pressure sensor
Fuel/ pump relay r7
G300 (under driver's seat)
G301
Gnd
High fan
Hot at all times
Ign
Ignition 1
Ignition switch
Instrument panel cluster
Logic
Low fan
Low ref
Malfunction indicator lamp (mil)
Mil control
Off
Pnk
Powertrain control module (left front of engine compt, inside air cleaner housing)
Rear fuse block (below left side
Relay control
Relay ctrl
Run
S201
S203
Ser data bus +
Ser data bus -
Side of rear seat)
Start
Starter enable
Starting/charging system
Stop lamp sw
Tan
Vehicle speed sig
Wakeup data

4.6L VIN Y

4.6L VIN Y, Engine Performance Wiring Diagram (1 of 5) for Buick Lucerne CXS 2007

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List of elements for 4.6L VIN Y, Engine Performance Wiring Diagram (1 of 5) for Buick Lucerne CXS 2007:

(left rear of engine compartment) transmission control module (tcm)
(lower left rear of engine) g112
(right of glove box) body control module (bcm)
(under driver's seat) g300
5v ref 1
5v ref 2
A/c com clutch rly
Accelerator pedal position (app) sensor (top of accelerator pedal assembly)
Accessory wake up
Air conditioning system
App sensor 1 sig
App sensor 2 sig
Battery pos volt
Cooling fans system
Ecm ign 3 fuse f5 10a
Ecm/crnk fuse f23 15a
Engine control module (ecm) (left side of engine compartment)
Engine oil pressure (eop) switch (near oil filter)
Evap canister vent
Exterior lights system
Fan relay ctrl
Fuel pump rly ctrl
Fuel tank pressure (ftp) sensor (on top of fuel tank)
G112 (lower left rear of engine)
Gnd
Hot at all times
Hot in run or start
Ign
Ignition 1 voltage
Instrument panel cluster (ipc)
Logic
Low reference
Malfunction indicator lamp (mil)
Mil control
Oss hi sig
Oss low sig
Oxy pst fuse f21 10a
Pnk
Pressure sns sig
Primary fuel level
Pwr/train relay
Pwr/train relay r4
Rly ctrl
Run/crnk relay r6
S104 (approximately 13 cm (5 in) from breakout to c138)
S105
S203
Serial data acc wake up
Starter rly coil
Starting/ charging system
Stop lamp sw sig
Tan
To fuse pwr trn fuse f22 (diagram 4 of 5)
Underhood fuse block (on right front of engine compartment, forward of strut tower)
Vehicle speed sensor (vss) (in transmission)

4.6L VIN Y, Engine Performance Wiring Diagram (2 of 5) for Buick Lucerne CXS 2007

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List of elements for 4.6L VIN Y, Engine Performance Wiring Diagram (2 of 5) for Buick Lucerne CXS 2007:

(below rear of vehicle, on evap canister) evaporative emission (evap) canister vent solenoid valve
(near a/c compressor, on hose assembly)
(top of fuel tank) fuel pump & sender assembly
(under left rear seat)
5v ref 1
5v ref 2
A/c refrigerant pressure sensor
Acc
Air pump relay ctrl
Cnstr vent fuse f5 10a
Cooling fans system
Ctrl bank 2 sns 1
Ecm/tcm fuse f28 15a
Engine control module (ecm) (left side of engine compartment)
Evap canister purge
Field duty cycle sig
Fuel pump fuse f11 20a
Fuel/ pump relay r7
G301
G403 (right front wall of luggage compartment)
Hot at all times
Ignition switch
Low reference
Low speed cooling
Off
Park/neutral
Pnk
Rear fuse block (below left side of rear seat)
Ref bank 2 sns 1
Reverse lockout sol
Run
S100
S201
S316 (in body harness, approximately 5 cm (2 in) from breakout for electronic suspension control module)
Serial data bus -
Start
Starting/ charging system
Tan
Transmissions system
Turn on signal
Volt bank 2 sns 1

4.6L VIN Y, Engine Performance Wiring Diagram (3 of 5) for Buick Lucerne CXS 2007

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List of elements for 4.6L VIN Y, Engine Performance Wiring Diagram (3 of 5) for Buick Lucerne CXS 2007:

(lower left front corner of engine compartment) secondary air injection (air) pump
(lower left rear of engine)
(on top right rear of engine) evaporative emission (evap) canister purge solenoid valve
(top center of rear camshaft cover) secondary air injection (air) check valve
Air pump fuse jc8 50a
Air pump relay r9
Air/ sol relay r12
Air/sol fuse f27 15a
Computer data lines system
Ect sensor sig
Engine control module (ecm) (left side of engine compartment)
Engine coolant temperature (ect) sensor (right rear of engine)
G115
Heated oxygen sensor (ho2s) bank 2 sensor 1 (in left exhaust manifold)
Hot at all times
Hot in run or start
Manifold absolute pressure (map) sensor (on top rear of engine)
Map sensor sig
Nca
Oil pre sw signal
Pnk
Pre sns sig
Refrig pre sen sig
S106
Serial data bus +
Tan
Underhood fuse block (on right front of engine compartment, forward of strut tower)

4.6L VIN Y, Engine Performance Wiring Diagram (4 of 5) for Buick Lucerne CXS 2007

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List of elements for 4.6L VIN Y, Engine Performance Wiring Diagram (4 of 5) for Buick Lucerne CXS 2007:

(below exhaust gas recirculation
(egr) valve)
(in engine harness,
(in engine harness, approximately 3 cm (1 in) from branch for c139) s109
(in engine harness, approximately 7 cm (4 in) from branch for c139 toward breakout for c138) s102
(in even bank ignition coil harness, between c139 & ignition coil/module 8) s135
(in even bank ignition coil harness, pnk
(in odd bank ignition coil harness, between c140 & ignition coil/module 7) s142
(in odd bank ignition coil harness, between c140 & ignition tan
(on right front of engine compartment, forward of strut tower)
(on top right rear of engine) exhaust gas recirculation (egr) valve
(top left side of engine)
(top right side of engine)
Approximately 6 cm (2 in) from branch for engine coolant temperature (ect) sensor)
Between c139 & ignition coil/module 8) s131
Coil/module 7) s146
Ctrl
From ecm/crnk fuse f23 (diagram 1 of 5)
Fuel injectors (top left side of engine)
Fuel injectors (top right side of engine)
G100
Gnd
Ign
Ignition coil/module 1
Ignition coil/module 2
Ignition coil/module 3
Ignition coil/module 4
Ignition coil/module 5
Ignition coil/module 6
Ignition coil/module 7
Ignition coil/module 8
Inj/coil fuse f24 15a c3
Inj/coil fuse f25 15a
Low
Nca
Plug spark
Pnk
Pnk/tan
Pwr trn fuse f22 15a
Red
Red b
S110
S133
S144
Spark plug
Tan
Tan c
Underhood fuse block

4.6L VIN Y, Engine Performance Wiring Diagram (5 of 5) for Buick Lucerne CXS 2007

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List of elements for 4.6L VIN Y, Engine Performance Wiring Diagram (5 of 5) for Buick Lucerne CXS 2007:

(left side of engine compartment, in air intake tube)
5v ref 1
5v ref 2
Camshaft position (cmp) sensor (on right front of engine)
Ckp sensor sig
Cmp sensor sig
Crankshaft position (ckp) sensor (top center of engine)
Egr sol high ctrl
Egr sol low ctrl
Egr valve pos sig
Engine control module (ecm) (left side of engine compartment)
Fuel injector 1
Fuel injector 2
Fuel injector 3
Fuel injector 4
Fuel injector 5
Fuel injector 6
Fuel injector 7
Fuel injector 8
G112 (lower left rear of engine)
Heated oxygen sensor (ho2s) 2 (in exhaust, after catalytic converter)
Heated oxygen sensor (ho2s) bank 1 sensor 1 (on right exhaust manifold)
Heater low ctrl
Ho2s 2 high sig
Ho2s 2 low sig
Iat sensor sig
Ic 1 control
Ic 2 ctrl
Ic 3 control
Ic 4 control
Ic 5 ctrl
Ic 6 ctrl
Ic 7 ctrl
Ic 8 control
Ignition 1 voltage
Knock sensor (ks) 1 (top right side of engine)
Knock sensor (ks) 2 (top left side of engine)
Knock sns 1 sig
Knock sns 2 sig
Low ref
Low reference
Maf sensor sig
Mass air flow (maf)/ intake air temperature (iat) sensor
Nca
Pnk
Pnk/red
Pnk/tan
Ref bank 1 sen 1
S105
Signal ground
Tac motor ctrl 1
Tac motor ctrl 2
Tan
Tan/pnk
Throttle body assembly
Tp sensor 1 sig
Tp sensor 2 sig
Volt bank 1 sns 1

EXTERIOR LIGHTS

Exterior Lamps Wiring Diagram (1 of 2) for Buick Lucerne CXS 2007

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List of elements for Exterior Lamps Wiring Diagram (1 of 2) for Buick Lucerne CXS 2007:

3.8l
4.6l
Auto
Backup lamp circuit
Batt pos volt
Body control module (bcm) (right of glove box)
Center high mounted stop lamp (chmsl)
Chmsl sply volt
Driver outside rear view mirror (in driver's door)
Engine control module (pcm) (left side of engine compt)
Front passenger outside rear view mirror (in front passenger's door)
G300 (under driver's seat)
G301 (under left rear seat)
G304 (under right front passenger's seat)
G403 (right front wall of luggage compt)
Hazard sw sig
Hazard switch
Head
Headlamp switch
Hot at all times
If equipped
Interior lights system
Left auxi- liary tail lamp
Left auxiliary tail lamp assembly
Left corn lmp rly ctrl
Left turn
Left turn sw sig
Lf turn
Lf turn sig lmp sply
Logic
Lr stop/turn lmp sply
Lt crn lamp fuse f19 10a
Off
Park
Powertrain control module (pcm) (left front of engine compt, inside air cleaner housing)
Prk lmp rly ctrl
Prk lmp sw on sig
Rf turn
Rf turn sig lmp sply
Right auxi- liary tail lamp
Right auxiliary tail lamp assembly
Right backup lamp
Right corn lmp rly ctrl
Right turn
Right turn sw sig
Rr stop/turn lmp sply
Rt crn lamp fuse f20 10a
S202
S204
S206
Sig lmp c1 sply volt
Stop lmp sw sig
Tan
Throttle actuator control (tac) module (on throttle body assembly)
Transmission control module (tcm) (left rear of engine compt)
Trn/sig pcb relay
Turn/signal multifunction switch
Underhood fuse block (on right front of engine compt, forward of strut tower)

Exterior Lamps Wiring Diagram (2 of 2) for Buick Lucerne CXS 2007

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List of elements for Exterior Lamps Wiring Diagram (2 of 2) for Buick Lucerne CXS 2007:

Chmsl/ bck-up fuse f18 10a
G104 (right front corner of engine compt)
G402 (left rear of luggage compt)
G403 (right front wall of luggage compt)
Hot at all times
Left front cornering lamp
Left front headlamp assembly
Left front marker lamp
Left front park/ turn signal lamp
Left rear marker lamp
Left stop/tail/turn signal lamp
Left tail lamp assembly
License lamp
Lt prk lamp fuse f42 10a
Lt trn/ sig fuse f15 15a
Prk lamp relay r2
Rear fuse block (below left side of rear seat)
Right front cornering lamp
Right front headlamp assembly
Right front marker lamp
Right front park/ turn signal lamp
Right rear marker lamp
Right stop/tail/turn signal lamp
Right tail lamp assembly
Rr trn/ sig fuse f16 15a
Rt prk lamp fuse f43 10a
S323 (in body harness, approximately 15 cm (6 in) from branch for rear fuse block)
S324 (in body harness, approximately 5 cm (2 in) from breakout for right inflatable restraint roof rail module)
S326
S402
S404 (in rear fascia harness, approximately 13 cm (5 in) from breakout for license lamps)
Tan
Trailer stop/turn
Underhood fuse block (on right front of engine compt, forward of strut tower)

3.8L VIN 2

3.8L VIN 2, Back-up Lamps Wiring Diagram for Buick Lucerne CXS 2007

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List of elements for 3.8L VIN 2, Back-up Lamps Wiring Diagram for Buick Lucerne CXS 2007:

(in body harness, approximately 7 cm (3 in) from breakout for battery current sensor) s325
(lower left rear of engine) g112
Automatic transmission
Backup
Backup lmp sply
Batt pos volt
Body control module (bcm) (right of glove box)
Bus +
Bus -
Chmsl/ bck-up fuse f18 10a
Code a
Code b
Computer data lines system
G403 (right front wall of luggage compt)
Hot at all times
Inside rear view mirror
Left auxiliary tail lamp assembly
Left backup lamp
Lmp sply volt
Logic
Powertrain control module (left front of engine compt, inside air cleaner housing)
Rear fuse block (below left side of rear seat)
Right auxiliary tail lamp assembly
Right backup lamp
Sig a
Sig b
Tan
Transmission internal mode switch

4.6L VIN Y

4.6L VIN Y, Back-up Lamps Wiring Diagram for Buick Lucerne CXS 2007

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List of elements for 4.6L VIN Y, Back-up Lamps Wiring Diagram for Buick Lucerne CXS 2007:

(in body harness, approximately 7 cm (3 in) from breakout for battery current sensor) s325
(lower left rear of engine) g112
Automatic transmission
Backup
Backup lmp sply
Batt pos volt
Body control module (bcm) (right of glove box)
Bus +
Bus -
Chmsl/ bck-up fuse f18 10a
Computer data lines system
G403 (right front wall of luggage compt)
Hot at all times
Inside rear view mirror
Left auxiliary tail lamp assembly
Left backup lamp
Lmp sply volt
Logic
Nca
Rear fuse block (below left side of rear seat)
Right auxiliary tail lamp assembly
Right backup lamp
S105
Sig a
Sig b
Tan
Transmission control module (left rear of engine compt)
Transmission internal mode switch

GROUND DISTRIBUTION

Ground Distribution Wiring Diagram (1 of 4) for Buick Lucerne CXS 2007

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List of elements for Ground Distribution Wiring Diagram (1 of 4) for Buick Lucerne CXS 2007:

(3.8l) ignition control module (icm)
(4.6l) a/c compressor clutch
(4.6l) secondary air injection (air) check valve
(4.6l) secondary air injection (air) pump
(if equipped) sunroof control module
(on right front of engine compartment, forward of strut tower) underhood fuse block
(w/ magnetic ride control) electronic suspension control (esc) module
14 cm (6 in) from branch for throttle body assembly)
3.8l & pzev
4.6l
A c2
Automatic level control (alc) compressor
Automatic transmission
B c1
Battery
Battery current sensor
Body control module (bcm)
Crnk relay 3
Electronic brake control module (ebcm)
Engine control module (ecm)
Engine oil pressure (eop) switch
Fuel pump & sender assembly
G100 (4.6l) (below exhaust gas recirculation (egr) valve)
G101 (left front corner of engine compartment)
G112 (except 3.8l) (lower left rear of engine)
G114 (lower left rear of engine)
G115 (lower left rear of engine)
G302 (under right front passenger's seat)
G303 (below right side of rear seat)
G306 (at left "c" pillar)
G307 (at right "c" pillar)
G403 (right front wall of luggage compartment)
Ignition coil/ module 1
Ignition coil/ module 2
Ignition coil/ module 3
Ignition coil/ module 4
Ignition coil/ module 5
Ignition coil/ module 6
Ignition coil/ module 7
Ignition coil/ module 8
Inflatable restraint sensing & diagnostic module (sdm)
Keyless entry antenna
Left auxiliary tail lamp assembly
License lamp
Mass air flow (maf)/ intake air temperature (iat) sensor
Nca
Rear window defogger
Right auxiliary tail lamp assembly
Right tail lamp assembly
Run/ crnk relay 6
S106 (in engine harness, approximately 7 cm (3 in) from branch for throttle body assembly)
S108 (in engine harness, approximately 10 cm (4 in) from breakout for automatic transmission)
S133 (in even bank ignition coil harness, between c139 & ignition coil/module 2)
S144
S385 (in body harness, approximately 10 cm (4 in) from g306)
S402 (in rear fascia harness, approximately 7 cm (3 in) from breakout for license lamps)
Transmission control module (tcm)
Windshield wiper motor

Ground Distribution Wiring Diagram (2 of 4) for Buick Lucerne CXS 2007

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List of elements for Ground Distribution Wiring Diagram (2 of 4) for Buick Lucerne CXS 2007:

(on right front of engine compartment, forward of strut tower) underhood fuse block
(pzev) secondary air injection (air) check valve
(to passenger seat adjuster switch diagram 3 of 4)
(w/ keyless entry start/ extended range) hood ajar switch
12 cm (5 in) from breakout for c800)
A/c compressor clutch
Approximately 6 cm (2 in) from breakout for a/t shift lock control solenoid)
Automatic transmission
Auxiliary power outlet console
Blower motor control module
Body control module (bcm)
C1 c
C2 d
Cigar lighter
Cool/fan relay 2
Engine oil level switch
Engine oil pressure (eop) switch
Floor shifter assembly
For i/p compartment lamp)
Front passenger door module (fpdm)
G104 (right front corner of engine compartment)
G112 (3.8l) (lower left rear of engine)
G304 (under right front passenger's seat)
Headlamp switch
Horn assembly
I/p compartment lamp
Left front fog lamp
Left front headlamp assembly
Mass air flow (maf)/ intake air temperature (iat) sensor
Nca
Powertrain control module (pcm)
Reverse lockout solenoid
Right cooling fan
Right front door courtesy lamp
Right front fog lamp
Right front headlamp assembly
Right rear door latch assembly
Right rear door window switch
Run/ crnk relay 6
S383 (in center console harness, between breakout for a/t shift lock control solenoid & breakout for auxiliary hvac control module)
S387
Throttle actuator control (tac) module
Traction control switch
W/ custom bucket seat
Windshield washer fluid level switch
Windshield washer fluid pump
Windshield washer solvent heater
Wpr relay 8

Ground Distribution Wiring Diagram (3 of 4) for Buick Lucerne CXS 2007

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List of elements for Ground Distribution Wiring Diagram (3 of 4) for Buick Lucerne CXS 2007:

(from splice s387 diagram 2 of 4)
(w/ custom bucket seat) ignition lock cylinder solenoid
(w/ front cooling heater) front climate control seat module
(w/o custom bucket seat) shift lock control column shifter solenoid
(w/o custom bucket seat) traction control switch
Approximately 8 cm (4 in) from breakout for inflatable restraint seat position sensor)
Ashtray lamp
Brake fluid level switch
C2 d
C205 & turn signal/multifunction switch connector c4)
Data link connector (dlc)
Driver door module (ddm)
Driver information display switch
Driver seat adjuster switch
Front auxiliary power outlet
Front cigar lighter
G300 (under driver's seat)
Hazard switch
Heated steering wheel control module
Horn switch
Hvac control module
Inflatable restraint passenger presence system (pps) module
Inflatable restraint steering wheel module coil
Inside air tempe- rature sensor
Instrument panel cluster
Instrument panel cluster (ipc)
Left front door courtesy lamp
Left steering wheel control switch
Lighter)
Memory seat module (msm)
Nca
Passenger lumbar adjuster switch
Passenger seat adjuster switch
Rear compartment lid release switch
Restraint steering wheel module coil)
Right steering wheel control switch
S203 (in i/p harness, approximately 36 cm (14 in) from breakout for hvac module)
S306 (in right front seat harness, approximately 7 cm (3 in) from breakout for passenger seat belt switch)
Sunload twilight sensor
Theft deterrent module (tdm)
Turn signal/ multifunction switch
W/ 8-way passenger seat adjuster
W/ automatic auxiliary temperature
W/ heated nozzles
W/o 8-way passenger seat adjuster
W/o automatic auxiliary temperature
W/o custom bucket seat

Ground Distribution Wiring Diagram (4 of 4) for Buick Lucerne CXS 2007

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List of elements for Ground Distribution Wiring Diagram (4 of 4) for Buick Lucerne CXS 2007:

(below left side of rear seat) rear fuse block
(if equipped) object alarm module
(if equipped) outside moisture sensor
(w/ digital audio system s-band) digital radio receiver (drr)
(w/ onstar) vehicle communication interface module
(w/ suspension system) automatic level control module
Amplifier
Amplifier connector c1)
Center high mounted stop lamp (chmsl)
Dr lck relay 9
Dr unlck relay 10
Fuel/ pump relay 7
G110 (ground strap to generator)
G111 (in engine compartment, ground strap to right frame rail)
G301 (under left rear seat)
G305 (under driver's seat)
G402 (left rear of luggage compartment)
Garage door opener transmitter
Inflatable restraint i/p module indicator
Inside rearview mirror
Left front vanity mirror lamp
Left rear door latch assembly
Left rear door window switch
Left roof rail reading lamp
Left tail lamp assembly
Nca
Overhead console lamp
Radio
Rap relay 1
Rear compartment lid latch
Rear defog relay 14
Remote control door lock receiver (rcdlr)
Right front vanity mirror lamp
Right roof rail reading lamp
Run relay 3
S312 (in headliner harness, approximately 10 cm (4 in) from branch for c321)
S313
Sunroof switch
Trunk relse relay 6
W/ premium audio branded & amplifier

HEADLIGHTS

Headlights Wiring Diagram for Buick Lucerne CXS 2007

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List of elements for Headlights Wiring Diagram for Buick Lucerne CXS 2007:

Body control module (bcm) (right of glove box)
C (not used)
Class 2 serial data
Computer data lines system
Data serial
Drl fuse f30 15a
Drl relay 4
Drl rly ctrl
Exterior lights system
Flash to pass sw sig
Fog fuse 16 15a
Fog lamp pcb relay
Fog lamps ind
Front fog lamp switch
Frt fog lamp rly ctrl
Frt fog lamp sw sig
Ftp
G104 (right front corner of engine compt)
G300 (under driver's seat)
G304 (under right front passenger's seat)
Gmlan (bcm)
Head
Headlamp sw off sig
Headlamp sw on sig
Headlamp switch
Hi beam fuse f10 10a
Hi beam fuse f11 10a
High
High beam ind
High beam pcb relay
High beam rly ctrl
Highbeam signal
Hot at all times
Hvac control module
Ign
Instrument panel cluster (ipc)
Left front fog lamp
Left front headlamp assembly
Left high beam headlamp
Left low beam headlamp
Light sensor sig
Lo beam pcb relay
Logic
Low
Low beam rly ctrl
Lt lo beam fuse f2 20a
Off
Park auto
Park lamp relay ctrl
Park lamp sw on sig
Rear fuse block (below left side of rear seat)
Right front fog lamp
Right front headlamp assembly
Right high beam headlamp
Right low beam headlamp
Rt lo beam fuse f3 20a
S124 (in forward lamp harness, approximately 26 cm (11 in) from c114)
S203
S204
S206
Serial data
Sunload twilight sensor (top center of dash)
Turn signal/ multifunction switch
Underhood fuse block (on right front of engine compartment, forward of strut tower)
W/ automatic a/c
W/ manual a/c

HORN

Horn Wiring Diagram for Buick Lucerne CXS 2007

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List of elements for Horn Wiring Diagram for Buick Lucerne CXS 2007:

(right front corner of engine compartment) g104
Body control module (bcm) (right of glove box)
G300 (under driver's seat)
High note horn
Horn assembly (left front of engine compartment)
Horn fuse f17 15a
Horn pcb relay
Horn rly ctrl
Horn switch
Hot at all times
Inflatable restraint steering wheel module coil (top of steering column)
Low note horn
Nca
S219
S377 (in body harness, approximately 15 cm (6 in) from breakout for c206)
Tan
Underhood fuse block (on right front of engine compartment, forward of strut tower)

INSTRUMENT CLUSTER

Instrument Cluster Wiring Diagram (1 of 2) for Buick Lucerne CXS 2007

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List of elements for Instrument Cluster Wiring Diagram (1 of 2) for Buick Lucerne CXS 2007:

Abs ind
Air bag ind
Audible alarm
Backlighting ctrl
Backlighting ind
Batt pos volt
Brake ind
Charging ind
Cruise ind
Drv info center select menu sw sig
Drv info center sw low ref
Drv info center sw sig
Engine controls system
Engine coolant temperature ind
Fog lamps ind
Fuel level gage
G300 (under driver's seat)
Gmlan
Gmlan (bcm)
Gmlan (ebcm)
Gmlan (ecm)
Gmlan (sdm)
Gnd
Ground
High beam ind
Hot at all times
Hot w/ run/crnk relay energized
Hvac fuse f14 10a
I/p harn mdl fuse f31 10a
Ign
Ign 1 volt
Instrument panel cluster (ipc)
Interior lights system
Ipc
Left turn ind
Logic
Low spd gmlan serial data
Low tire pressure ind
Low washer fluid ind ctrl
Malfunction ind
Message center
Off ind ctrl
Oil level ind
Pass air bag
Pass air bag on ind ctrl
Pass seat belt ind
Pnk
Pnk/tan
Power distribution system
Rear fuse block (below left side of rear seat)
Right turn ind
S200
S202
S203
Seat belt ind
Security ind
Speedometer (mph/km/h)
Tachometer
Tan
Temperature gage
Trip reset
Trip reset sw sig
Trip/ odometer
Trip/odometer ctrl
Underhood fuse block (on right front of engine compt, forward of strut tower)
Vse ind
Washer fluid heat ctrl sw volt
Wiper/washer system

Instrument Cluster Wiring Diagram (2 of 2) for Buick Lucerne CXS 2007

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List of elements for Instrument Cluster Wiring Diagram (2 of 2) for Buick Lucerne CXS 2007:

3.8l
4.6l
Body control module (bcm) (right of glove box)
Brake fluid level switch (on master cylinder reservoir)
Computer data lines system
Driver information display switch
Engine control module (ecm) (4.6l) powertrain control module (ecm) (3.8l) (4.6l: left side of engine compt) (3.8l: left front of engine compt, inside air cleaner housing)
Engine controls system
Engine oil level switch (left side of oil pan)
Engine oil pressure (eop) switch (near oil filter)
Fuel level sens sig
Fuel pump & sender assembly (top of fuel tank)
G112 (lower left rear of engine)
G300 (under driver's seat)
Gmlan serial data+
Gmlan serial data-
Interior lights system
Logic
Low ref
Low spd gmlan serial data
Oil level sw sig
Oil press sw sig
Park brake sw sig
Park brake switch (on top of park brake assembly)
Persona- lization
Pnk
S105 (4.6l)
S202
S316 (in body harness, approximately 5 cm (2 in) from breakout for electronic suspension control module)
Set/ reset
Tan
Trip/ fuel
Vehicle information

INTERIOR LIGHTS

Courtesy Lamps Wiring Diagram for Buick Lucerne CXS 2007

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List of elements for Courtesy Lamps Wiring Diagram for Buick Lucerne CXS 2007:

(in body harness, approximately 14 cm (6 in) from breakout for c325) s329
(in body harness, approximately 5 cm (2 in) from breakout for audio amplifier connector c1) s372
(left rear of luggage compartment)
(under right front passenger's seat)
12 volt ref
Batt pos volt
Body control module (bcm) (right of glove box)
Computer data lines system
Court lamp ctrl
Ctsy/ rf trn fuse f4 10a
Driver door latch assembly (rear of driver's door)
Driver door module (ddm)
Front passenger door latch assembly (rear of front passenger's door)
Front passenger door module (fpdm)
G300 (under driver's seat)
G301 (under left rear seat)
G304
G304 (under right front passenger's seat)
G402
G402 (left rear of luggage compartment)
Hot at all times
I/p compartment lamp
Int lamps fuse f3 10a
Left front door courtesy lamp
Left front vanity mirror lamp
Left rear door latch assembly (rear of left rear door)
Left roof rail reading lamp
Low ref
Low speed gmlan serial data
Lr door open sw sig
Off
Open sw sig
Overhead console lamp
Rear compartment courtesy lamp
Rear compartment lid latch (center rear of luggage compartment)
Rear fuse block (below left side of rear seat)
Right front door courtesy lamp
Right front vanity mirror lamp
Right rear door latch assembly (rear of right rear door)
Right roof rail reading lamp
S202
S206
S211 (in i/p harness, approximately 28 cm (11 in) from breakout for body control module connector)
S313
S328 (in headliner harness, approximately 20 cm (8 in) from branch for c321)
S331 (in ip harness, between body control module & front door courtesy lamps)
S343 (in body harness, approximately 9 cm (3 in) from branch for c314)
S700
S800
Tan/ pnk
Tan/pnk
Trunk lmp ctrl
W/ theft deterrent system
W/o theft deterrent system

Instrument Illumination Wiring Diagram for Buick Lucerne CXS 2007

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List of elements for Instrument Illumination Wiring Diagram for Buick Lucerne CXS 2007:

(in i/p harness, approximately 21 cm (8 in) from branch for hazard lamp switch toward branch for hvac module) s212
(under
12 volt ref
Ashtray lamp
Automatic transmission
Backlight lamp ctrl
Backlighting (8 bulbs)
Backlighting control
Batt pos volt
Body control module (bcm) (right of glove box)
Court lamp sw on sig
D c2
Dm switch fuse f10 10a
Driver information display switch
Driver's seat)
G300
G300 (under driver's seat)
G301 (under left rear seat)
G304 (under right front passenger's seat)
G305 (under driver's seat)
G402 (left rear of luggage compartment)
Garage door opener transmitter (in overhead console)
Hazard switch
Headlamp switch
Hot at all times
Hvac control module
I/p dimming sig
Inflatable restraint steering wheel module coil (top of steering column)
Inst panel lamp sply
Instrument panel cluster (ipc)
Led dimming sig
Left rear door window switch
Left steering wheel control switch
Lighter) c2
Logic
Manual transmission
Pnk
Radio
Rear fuse block (below left side of rear seat)
Reverse lockout solenoid (w/ custom seat) (base of floor shifter assembly)
Right rear door window switch
Right steering wheel control switch
S202
S203
S219
S225 (inside of heated steering wheel)
S312
S313
S333 (in body harness, approximately 35 cm (14 in) from breakout for left inflatable restraint side impact sensor)
S383
S700
S800
Str/whl/ illum fuse f34 2a
Sunroof switch (if equipped)
Traction control switch
W/ custom seat
W/ individual seat

MEMORY SYSTEMS

Memory Seat Wiring Diagram (1 of 5) for Buick Lucerne CXS 2007

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List of elements for Memory Seat Wiring Diagram (1 of 5) for Buick Lucerne CXS 2007:

(4 in) from driver seat adjuster motor connector)
(approximately 7 cm (3 in) from breakout for passenger seat cushion ventilation heat & cool module) s358
(approximately 7 cm (3 in) from passenger seat cushion ventilation heat & cool module connector) s357
(in driver seat harness, approximately 10 cm
Battery
Climate control seat module
Computer data lines system
Cool control
Driver seat back ventilation heat & cool module (right side of driver's seat back)
Driver seat cushion ventilation heat & cool module (under right side of driver's seat)
Front passenger seat back ventilation heat & cool module
Front passenger seat cushion ventilation heat & cool module
G304 (under right front passenger's seat)
Ground
Heat control
Heating element
Hot at all times
Hot in run or start
Htd/cool fuse f27 30a
Htd/cool/ ign 3 fuse f47 10a
Ign 3 vol
Lh mode sig
Low ref
Pnk
Rear fuse block (below left side of rear seat)
Rh mode sig
S302 (w/ custom seat)
S306
S355
S356 (in driver seat harness, approximately 9 cm (4 in) from driver seat cushion ventilation heat & cool module connector)
Sens low ref
Sens sig
Serial data
Speed ctrl
Sup volt
Tan
Tan/pnk
Thermistor

Memory Seat Wiring Diagram (2 of 5) for Buick Lucerne CXS 2007

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List of elements for Memory Seat Wiring Diagram (2 of 5) for Buick Lucerne CXS 2007:

Back cushion ind
Back cushion sig
Back cushion sw sig
Back mode ind
Back mode ind cntrl
Back mode sw sig
Battery pos volt
Computer data lines system
Cool ind cntrl
Cool seat switch
Cool sw sig
Cooled seat switch
Ddm fuse f24 15a
Driver door module (ddm)
Driver heated & cooled seat switch
Easy exit seat switch
Exit sig
Front passenger door module (fpdm)
Front passenger heated & cooled seat switch
Full seat heat switch
Gmlan serial data
Heated seat back ind
Heated seat cool ind
Heated seat cushion ind
Heated seat ind
High ind ctrl
High ref
High temp ind
Hot at all times
Lamp dimming
Low ind ctrl
Low ref
Low temp ind
Medium ind ctrl
Medium temp ind
Memory 1 switch
Memory 2 switch
Pdm fuse f25 15a
Pnk
Rear fuse block (below left side of rear seat)
Seat back heat switch
Tan
Tan/ red
Tan/red

Memory Seat Wiring Diagram (3 of 5) for Buick Lucerne CXS 2007

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List of elements for Memory Seat Wiring Diagram (3 of 5) for Buick Lucerne CXS 2007:

(approximately 14 cm (6 in) from breakout for driver seat adjuster motor) s351
(under driver's seat) g300
A c1
B c1
Battery pos volt
D c2
Down ctrl
Driver lumbar position sensors
Driver seat lumbar massage motor (in driver's seat back)
Driver seat recline motor (in driver's seat back)
Driver seat recline position sensor
Forward ctrl
Front ver mtr dn ctrl
Front ver mtr up ctrl
Ground
Horizontal motor
Horizontal sensor
Hot at all times
Lh back element ctrl
Lh back sens low ref
Lh cushion element ctrl
Lh tempt sens low ref
Low ref
Lumbar forward ctrl
Lumbar rearward ctrl
Memory seat module (msm) (on underside of driver's seat, on seat adjuster frame)
Memory seat sw high sig
Msm logic/ rf massage fuse f36 10a
Msm/lt frt pwr seat circuit breaker cb2 25a
Pnk
Pnk a
Rear fuse block (below left side of rear seat)
Rear ver mtr dn ctrl
Rear ver mtr up ctrl
Rearward ctrl
Recline forward ctrl
Recline rearward ctrl
Red
Red/ pnk
Red/pnk
Rh back sens low ref
Rh cushion element ctrl
Rh element ctrl
Rh tempt sens low ref
S305
S352 (in left front seat harness, approximately 7 cm (3 in) from breakout for inflatable restraint seat position sensor)
Tan
Tan/ red
Tan/red
Up ctrl
Vertical motor
Vertical sensor

Memory Seat Wiring Diagram (4 of 5) for Buick Lucerne CXS 2007

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List of elements for Memory Seat Wiring Diagram (4 of 5) for Buick Lucerne CXS 2007:

Driver seat adjuster motor assembly (below driver seat)
Driver seat front vertical motor
Driver seat front vertical position sensor
Driver seat horizontal motor
Driver seat horizontal position sensor
Driver seat rear vertical motor
Driver seat rear vertical position sensor
Heating element
Left front back heated seat element
Left front cushion heated seat element
Pnk
Right front cushion heated seat element
Right front heated seat back element
S360 (in right front seat harness, between c314 & left front cushion heated seat element)
Tan
Tan/red
Thermistor

Memory Seat Wiring Diagram (5 of 5) for Buick Lucerne CXS 2007

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List of elements for Memory Seat Wiring Diagram (5 of 5) for Buick Lucerne CXS 2007:

5v ref
Computer data lines system
Down
Driver cushion tempt sens sig
Driver lumbar adjuster switch
Driver seat adjuster switch
Driver seat back tempt sens sig
Drv seat lumbar dn sw sig
Drv seat lumbar forward sw sig
Drv seat lumbar rearward sw sig
Drv seat lumbar up sw sig
Forward
Front vertical down
Front vertical down sw sig
Front vertical mtr pos sens sig
Front vertical up
Front vertical up sw sig
Gmlan serial data
Heated seat ctrl module status sig
Horizontal forward
Horizontal mtr pos sens sig
Horizontal rearward
Horz forward sw sig
Horz rearward sw sig
Lumbar horizontal pos sens sig
Lumbar vertical pos sens sig
Memory seat module (msm) (on underside of driver's seat, on seat adjuster frame)
Rear vertical down
Rear vertical down sw sig
Rear vertical mtr pos sens sig
Rear vertical up
Rear vertical up sw sig
Rearward
Recline forward
Recline mtr forward ctrl
Recline mtr pos sens sig
Recline mtr rearward ctrl
Recline rearward
Rh seat back tempt sens sig
Rh seat cushion tempt sens sig
Rh seat mode signal
S349 (approximately 8 cm (4 in) from breakout for auxiliary power outlet connector)
Tan

NAVIGATION

Navigation Wiring Diagram for Buick Lucerne CXS 2007

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List of elements for Navigation Wiring Diagram for Buick Lucerne CXS 2007:

(coax)
Battery
Cellular microphone (in overhead console)
Class 2 serial data
Computer data lines system
Drain
Drain wire
Drain wire voice rec low ref
G305 (under driver's seat)
Global positioning satellite (gps) antenna
Gps antenna
Ground
Hot at all times
Navigation voice sig voice rec aud sig
Radio
Rdo fuse f21 15a
Rear fuse block (below left side of rear seat)
Rec aud sig
Rec low ref
Signal
Vehicle communication interface module (vcim) (if equipped) (on right front of trunk, attached to seat back brace)
W/ communication system
W/o communication system

Parking Assistant Wiring Diagram for Buick Lucerne CXS 2007

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List of elements for Parking Assistant Wiring Diagram for Buick Lucerne CXS 2007:

Center amber ind
Center amber ind ctrl
Computer data lines system
G301 (under left rear seat)
Ground
Hot at all times
Ign 1 voltage
Left amber ind
Left amber ind ctrl
Left rear corner object alarm sensor (on left corner of rear bumper fascia)
Left rear middle object alarm sensor (on left middle of rear bumper fascia)
Low ref
Low reference
Low speed gmlan serial data
Lr corner object sensor sig
Lr middle object sensor sig
Obj snsr fuse 37 10a
Object alarm module (on right rear wheelwell)
Object sensor sply volt
Rear fuse block (below left side of rear seat)
Rear park assist indicator
Red ind
Red ind ctrl
Right rear corner object alarm sensor (on right corner of rear bumper fascia)
Right rear middle object alarm sensor (on right middle of rear bumper fascia)
Rr corner object sensor sig
Rr middle object sensor sig
S400 (in rear fascia harness, approximately 7 cm (3 in) from breakout for right middle object alarm sensor)
S401 (in rear fascia harness, approximately 7 cm (3 in) from breakout for right middle object alarm sensor)
Sensor signal
Teltale assembly sply volt

POWER DISTRIBUTION

Power Distribution Wiring Diagram (1 of 5) for Buick Lucerne CXS 2007

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List of elements for Power Distribution Wiring Diagram (1 of 5) for Buick Lucerne CXS 2007:

(in engine harness, approximately 41 cm (16 in) from underhood fuse block connector c3) s111
(in ip harness, between c201 & c202) s229
(on right front of engine compt, forward of strut tower) underhood fuse block
3.8l
4.6l
A/c fuse 10a
A/c relay 11
Abs 1 fuse jc7 50a
Abs 2 fuse jc6 60a
Air bag ign 3 fuse 4 10a
Air pump fuse jc8 50a
Air pump relay 9
Air/ sol fuse 15a
Air/sol relay 12
Automatic transmission
Battery
Cool/fan 1 relay 1
Cool/fan 2 relay 7
Crnk fuse jc4 40a
Crnk relay 3
Ecm ign 3 fuse 5 10a
Electronic brake control module (ebcm)
Engine control module (ecm) (4.6l) powertrain control module (pcm) (3.8l)
Fan 1 fuse jc2 30a
Fan 2 fuse jc5 30a
Fog lamp pcb relay
From b trn/sig pcb relay (diagram 1 of 5)
From ignition switch (diagram 5 of 5)
Fusible link
G112 (lower left rear of engine)
Generator
High/beam pcb relay
Horn pcb relay
Hvac control module
Hvac/ipc fuse 14 10a
Inflatable restraint i/p module indicator
Inflatable restraint sensing & diagnostic module (sdm)
Instrument panel cluster (ipc)
Lo/beam pcb relay
Pnk
Pnk/ red
Pwr/train relay 4
Recirculation actuator
Red
Run/ crank relay 6
S105 (4.6l)
Starter motor
To rear fuse block (diagram 2 of 5)
To wpr fuse (diagram 1 of 5)
Trans ign 3 fuse 6 10a
Transmission control module (tcm)
Trn/sig pcb relay
W/ automatic a/c
W/ electronic a/c
W/ electronic a/c pnk
W/ heated nozzle
Windshield washer solvent heater
Wpr fuse 25a
Wpr hi relay 10
Wpr relay 8
Wsh htd fuse jc1 60a
Wsh pcb relay

Power Distribution Wiring Diagram (2 of 5) for Buick Lucerne CXS 2007

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List of elements for Power Distribution Wiring Diagram (2 of 5) for Buick Lucerne CXS 2007:

(base)
(below left side of rear seat) rear fuse block
(in body harness, approximately 10 cm (4 in) from audio amplifier connector c1) s366
(in engine harness, approximately 80 cm (31 in) from underhood fuse block connector c3) s100
(uplvl)
3.8l
30a
4.6l
Air bag fuse 13 10a
Amp fuse 1 20a
Amplifier
Body control module
Body harn mdl fuse 35 10a
Cnstr vent fuse 5 10a
Data link connector (dlc)
Ddm fuse 24 15a
Digital radio receiver
Driver door module (ddm)
Ecm/tcm fuse 28 15a
Engine control module (ecm)
Evaporative emission (evap) canister vent solenoid valve
From battery (diagram 1 of 5)
From c amp fuse 1 (diagram 2 of 5)
Front climate control seat module
Front passenger door module (fpdm)
Garage door opener transmitter
Htd/ cool fuse 27 30a
Hvac control module
I/p harn mdl fuse 31 10a
Inflatable restraint passenger presence system (pps) module
Inflatable restraint sensing & diagnostic module (sdm)
Instrument panel cluster (ipc)
Onstar/ s-band fuse 22 10a
Pdm fuse 25 15a
Pnk/ red
Powertrain control module (pcm)
Radio
Rdo fuse 21 15a
Red
Remote control door lock receiver (rcdlr)
Rvc sense fuse 29 10a
S-band
S301 (in body harness, approximately 14 cm (6 in) from breakout for yaw & lateral acceleration sensor)
Tan/ red
Theft deterrent module (tdm)
To body harn mdl fuse 35 (diagram 2 of 5)
To ign swtch fuse 48 (diagram 3 of 5)
Transmission control module (tcm)
Vehicle communication interface module
W/ onstar
W/ performance enhanced audio

Power Distribution Wiring Diagram (3 of 5) for Buick Lucerne CXS 2007

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List of elements for Power Distribution Wiring Diagram (3 of 5) for Buick Lucerne CXS 2007:

(below left side of rear seat) rear fuse block
(in center console harness, approximately 10 cm (4 in) from breakout for a/t shift lock control solenoid) s315
(in right front seat harness, approximately 114 cm (45 in) from passenger seat adjuster switch connector) s348
Automatic level control (alc) compressor
Automatic level control module
Aux pwr fuse 14 20a
Aux pwr fuse 23 20a
Auxiliary power outlet console
Blower motor control module
Body control module (bcm)
Chmsl/ bck-up fuse 18 10a
Cigar lighter
Cigar lighter (w/ custom seat)
Driver seat adjuster switch
Elc mdl fuse 7 10a
Electronic suspension control (esc) module
From d pdm fuse 25 (diagram 2 of 5)
From e mrtd mdl fuse 6 (diagram 3 of 5)
Front auxiliary power outlet
G300 (under driver's seat)
G304 (under right front passenger's seat)
Hvac blwr fuse jc1 40a
Ign switch fuse 48 5a
Int lamps fuse 3 10a
Lt trn/ sig fuse 15 15a
Memory seat module
Mrtd mdl fuse 6 25a
Msm logic/ rf massage fuse 36 10a
Msm/lt frt pwr seat circuit breaker 2 25a
Msm/rt frt pwr seat circuit breaker 1 25a
Obj snsr fuse 37 10a
Object alarm module
Passenger lumbar adjuster switch
Passenger seat adjuster switch
Red/ pnk
Rr trn/ sig fuse 16 15a
S221
S307
Switch dm fuse 10 10a
To ignition switch (diagram 5 of 5)
To obj snsr fuse 37 (diagram 3 of 5)
To rap relay 1 (diagram 4 of 5)
Trunk relse relay 6
W/ 8-way
W/ air suspension
W/ custom seat
W/ individual seat
W/ magneto rheological
W/ memory seat
W/ multi-directional
W/ rear parking assist
W/o memory seat

Power Distribution Wiring Diagram (4 of 5) for Buick Lucerne CXS 2007

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List of elements for Power Distribution Wiring Diagram (4 of 5) for Buick Lucerne CXS 2007:

(below left side of rear seat) rear fuse block
(in body harness, approximately 19 cm (8 in) from breakout for g301)
(in body harness, approximately 64 cm (26 in) from branch for battery current sensor)
(in center console harness, approximately 8 cm (3 in) from breakout for a/t shift lock control solenoid) s381
Bck-up fuse 18 (diagram 3 of 5)
Bcm logic fuse 12 10a
Body control module (bcm)
Ctsy/ rf trn fuse 4 10a
Dr lck relay 9
Dr mdl/ pwr wndw circuit breaker 3 25a
Dr unlck relay 10
Driver door module (ddm)
Drl relay 4
Elc comprsr fuse jc3 30a
Elc comprsr relay 15
Floor shifter assembly
From branch for battery current sensor) s337
From chsml/ f
From dr mdl/pwr g wndw circuit breaker 3 (diagram 3 of 5)
Front climate control seat module
Front passenger door module (fpdm)
Fuel pump fuse 11 20a
Fuel/ pump relay 7
G301 (under left rear seat)
Heated steering wheel control module
Htd str fuse 44 15a
Htd/ cool/ ign 3 fuse 47 10a
Inflatable restraint steering wheel module coil
Inside rearview mirror
Left rear door window switch
Nca
Outside moisture sensor (if equipped)
Park switch
Prk lamp relay 2
Rap fuse 41 10a
Rap relay 1
Rear defog fuse jc2 40a
Rear defog relay 14
Rear dr lck fuse 19 20a
Reverse lockout solenoid
Right rear door window switch
Run relay 3
S/roof fuse 17 25a
S302
S382
Shftr sol fuse 40 10a
Sunroof control module
Tan/ pnk
To rear defog fuse jc2 (diagram 4 of 5)
W/ custom seat
W/ front heated seat cooling
W/ heated nozzle
W/ individual seat
W/o front heated seat cooling
Windshield washer solvent heater

Power Distribution Wiring Diagram (5 of 5) for Buick Lucerne CXS 2007

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List of elements for Power Distribution Wiring Diagram (5 of 5) for Buick Lucerne CXS 2007:

(in engine harness, approximately 13 cm (5 in) from breakout for c138) s104
(in steering column harness, between c203 & ignition switch connector) s201
3.8l
4.6l
Acc
Body control module (bcm)
Engine control module (ecm)
From ign sw fuse (diagram 3 of 5)
Ignition switch
Inflatable restraint steering wheel module coil
Key-in switch
Left steering wheel control switch
Off
Pnk
Powertrain control module (pcm)
Rear fuse block (below left side of rear seat)
Right steering wheel control switch
Run
Start
Str/whl/ illum fuse 34 2a
Theft deterrent module (tdm)
To run/crank relay 6 (diagram 1 of 5)
Transmission control module (tcm)

POWER DOOR LOCKS

Power Door Locks Wiring Diagram for Buick Lucerne CXS 2007

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List of elements for Power Door Locks Wiring Diagram for Buick Lucerne CXS 2007:

(in body harness, approximately 9 cm (3 in) from branch for c314) s343
(under center of rear package shelf) remote control door lock receiver (rcdlr)
(under left rear seat) g301
Battery
Body control module (bcm) (right of glove box)
Body harn mdl fuse f35 10a
Computer data lines system
Ddm fuse f24 15a
Dr lck relay r9
Dr lock act ctrl
Dr mdl/ pwr wndw circuit breaker cb3 25a
Dr unlck relay r10
Dr unlock act ctrl
Driver door latch assembly (rear of driver's door)
Driver door module (ddm)
Drv dr key sw sig
Exterior lights system
Front passenger door latch assembly (rear of front passenger's door)
Front passenger door module (fpdm)
G104 (right front corner of engine compt)
G300 (under driver's seat)
G301 (under left rear seat)
G304 (under right front passenger's seat)
G306 (at left "c" pillar)
Gmlan serial data
Ground
Hood ajar sw sig
Hood ajar switch (w/ remote keyless entry) (center front of engine compt)
Hood closed sw sig
Horn rly ctrl
Horns system
Hot at all times
Ign
Instrument panel cluster (ipc)
Keyless entry antenna
Keyless entry antenna sig
Left rear door latch assembly (rear of left rear door)
Lf dr ajar sw sig
Lf dr open sw sig
Lf dr sw low ref
Logic
Low spd gmlan ser data
Lr dr ajar sw sig
Lr dr lock mtr ctrl
Lr dr open sw sig
Nca
Park lamp rly ctrl
Pdm fuse f25 15a
Rear dr lck fuse f19 20a
Rear fuse block (below left side of rear seat)
Rf dr ajar sw sig
Rf dr open sw sig
Rf dr sw low ref
Right rear door latch assembly (rear of right rear door)
Rr dr ajar sw sig
Rr dr open mtr ctrl
S301
S337
S385
S700
S800
Security ind
Serial data
Tan
Tan/ red
Tan/red
W/ theft deterrent system
W/o theft deterrent system

POWER MIRRORS

Electrochromic Mirror Wiring Diagram for Buick Lucerne CXS 2007

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List of elements for Electrochromic Mirror Wiring Diagram for Buick Lucerne CXS 2007:

(left rear of luggage compt) g402
Automatic day/night mir low ref
Automatic day/night mir sig
Computer data lines system
Driver outside rearview mirror (in driver's door)
Exterior lights system
Gmlan serial data
Ground
Hot w/ rap relay energized
Ign positive vol
Inside rearview mirror
Keypad green led sig
Keypad red led sig
Keypad sig
Nca
Power distribution system
Rap fuse 10a
Rear fuse block (below left side of rear seat)
S312
S382
Vehicle communication interface module (vcim) (w/ onstar) (on right front of trunk, attached to seat back brace)

Power Mirrors Wiring Diagram for Buick Lucerne CXS 2007

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List of elements for Power Mirrors Wiring Diagram for Buick Lucerne CXS 2007:

5v ref
Battery positive voltage
Ddm fuse 15a
Defogger system
Driver door module (ddm)
Driver mir horz pos sens sig
Driver mir ver pos sens sig
Driver outside rearview mirror (in driver's door)
Electrochromic mirror circuit
Exterior lights system
Front passenger door module (fpdm)
Heating element
Horizontal
Horizontal motor
Hot at all times
Left mir mtr dn ctrl
Left mir mtr left ctrl
Left mir mtr up/right ctrl
Low ref
Nca
Outside rearview mirror switch
Pass mir horz pos sens sig
Pass mir mtr left ctrl
Pass mir ver pos sens sig
Passenger outside rearview mirror (in front passenger door)
Pdm fuse 15a
Rear fuse block (below left side of rear seat)
Right mir mtr dn ctrl
Right mir mtr up/right ctrl
Tan/ red
Tan/pnk
Tan/red
Vertical motor

POWER SEATS

6-Way Power Seat Wiring Diagram for Buick Lucerne CXS 2007

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List of elements for 6-Way Power Seat Wiring Diagram for Buick Lucerne CXS 2007:

Driver seat adjuster motor assembly (below driver seat)
Driver seat adjuster switch
Driver seat front vertical motor
Driver seat horizontal motor
Driver seat rear vertical motor
Forward
Front down
Front passenger seat adjuster motor assembly (below front passenger's seat)
Front passenger seat front vertical motor
Front passenger seat horizontal motor
Front passenger seat rear vertical motor
Front up
G300 (under driver's seat)
G304 (under right front passenger's seat)
Hot at all times
Msm/lt frt pwr seat circuit breaker cb2 25a
Msm/rt frt pwr seat circuit breaker cb1 25a
Nca
Passenger seat adjuster switch
Rear down
Rear fuse block (below left side of rear seat)
Rear up
Rearward
Red/ pnk
S387
Tan

8-Way Passenger Power Seat Wiring Diagram for Buick Lucerne CXS 2007

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List of elements for 8-Way Passenger Power Seat Wiring Diagram for Buick Lucerne CXS 2007:

Forward
Front down
Front passenger seat adjuster motor assembly (below front passenger's seat)
Front passenger seat front vertical motor
Front passenger seat horizontal motor
Front passenger seat rear vertical motor
Front passenger seat recline motor
Front up
G304 (under right front passenger's seat)
Hot at all times
Msm/rt frt pwr seat circuit breaker cb1 25a
Nca
Passenger seat adjuster switch
Rear down
Rear fuse block (below left side of rear seat)
Rear up
Rearward
Recline forward
Recline rearward
S306
S348
Tan

Heated Steering Wheel Wiring Diagram for Buick Lucerne CXS 2007

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List of elements for Heated Steering Wheel Wiring Diagram for Buick Lucerne CXS 2007:

C1 d
D c2
G300 (under driver's seat)
Ground
Heated steering wheel
Heated steering wheel control module
Heated steering wheel on ind
Heated steering wheel switch
Hot w/ run relay energized
Htd str fuse f44 15a
Ign 1 vol
Ind ctrl
Inflatable restraint steering wheel module coil (top of steering wheel)
Left steering wheel control switch
Nca
Rear fuse block (below left side of rear seat)
Red

Lumbar Wiring Diagram for Buick Lucerne CXS 2007

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List of elements for Lumbar Wiring Diagram for Buick Lucerne CXS 2007:

Down
Forward
Front passenger seat lumbar motor
G304 (under right front passenger's seat)
Hot at all times
Msm/rt frt pwr seat circuit breaker cb1 25a
Passenger lumbar adjuster switch
Pnk
Rear fuse block (below left side of rear seat)
Rearward
S306 (w/ 8 way)
S348 (w/ 8 way)

POWER TOP/SUNROOF

Power Top/Sunroof Wiring Diagram for Buick Lucerne CXS 2007

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List of elements for Power Top/Sunroof Wiring Diagram for Buick Lucerne CXS 2007:

(not used)
Accessory vol
Battery
Close ctrl
Close sig
Close vent sig
Dimming
Express sig
G402 (left rear of luggage compartment)
G403 (right front wall of luggage compartment)
Ground
Hot in run or start
Interior lights system
Limit switch
Low ref
Open ctrl
Open sig
Open vent sig
Pnk
Rap fuse f41 10a
Rear fuse block (below left side of rear seat)
Roof close
Roof express
Roof open
S/roof fuse f17 25a
S313
S330
S382
Soft stop sig
Sunroof control module (rear of sunroof opening)
Sunroof motor
Sunroof motor assembly
Sunroof switch
Tan
Vent close
Vent express
Vent express sig
Vent open

POWER WINDOWS

Power Windows Wiring Diagram for Buick Lucerne CXS 2007

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List of elements for Power Windows Wiring Diagram for Buick Lucerne CXS 2007:

(under left rear seat) g301
(under right front passenger's seat) g304
Batt volt
Body control module (bcm) (right of glove box)
Computer data lines system
Dr mdl/ pwr wndw circuit breaker cb3 25a
Driver door module (ddm)
Driver door window switch
Driver window motor (in driver's door)
Front passenger door module (fpdm)
Front passenger door window switch
Front passenger window motor (in front passenger's door)
G300 (under driver's seat)
G304 (under right front passenger's seat)
Gmlan serial data
Ground
Hot at all times
Interior lights system
Left front down ctrl
Left front up ctrl
Left rear door window switch
Left rear down ctrl
Left rear down sig
Left rear up ctrl
Left rear up sig
Left rear window motor (in left rear door)
Logic
Master sw sig
Rear fuse block (below left side of rear seat)
Right rear door window switch
Right rear down ctrl
Right rear down sig
Right rear sig
Right rear up ctrl
Right rear up sig
Right rear window motor (in right rear door)
S337
S700
S800
Sply volt

RADIO

Radio Wiring Diagram, with Amplifier (1 of 2) for Buick Lucerne CXS 2007

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List of elements for Radio Wiring Diagram, with Amplifier (1 of 2) for Buick Lucerne CXS 2007:

(on right front of trunk, attached to seat back brace) (if equipped) vehicle communication interface module (vcim)
(under driver's seat) g305
14v sw sply volt
14v sw sply voltage
Amplifier control
Antenna sig
Antenna signal
Anti-lock brakes system
Audio common sig
Audio communication sig
Backlight lamp ctrl
Battery
Battery pos voltage
Coaxial cable
Computer data lines system
Device left audio sig
Digital radio antenna (center rear of roof)
Digital radio receiver (drr) (at left "d" pillar)
Drain wire
Front audio drain wire
G305 (under driver's seat)
Gps antenna
Gps antenna (under top center of dash)
Ground
Hot at all times
Interior lights system
Lf low level audio (-)
Lf low level audio sig
Lr low level audio (-)
Lr low level audio sig
Navigation system
Navigation voice sig
Pnk
Radio
Radio antenna module (at right "d" pillar)
Radio audio (-)
Radio left audio sig
Rdo fuse f21 15a
Rear audio drain wire
Rear fuse block (below left side of rear seat)
Remote radio audio (-)
Remote radio left audio sig
Rf low level audio (-)
Rf low level audio sig
Right audio sig (1)
Right audio sig (2)
Right audio signal (1)
Right audio signal (2)
Rr low level audio (-)
Rr low level audio sig
Serial data
Speed gmlan serial data
Tan
Tan/red
Vehicle speed sig

Radio Wiring Diagram, with Amplifier (2 of 2) for Buick Lucerne CXS 2007

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List of elements for Radio Wiring Diagram, with Amplifier (2 of 2) for Buick Lucerne CXS 2007:

(base) (uplevel)
Amp fuse f1 20a 30a
Amplifier (mounted to left rear of rear seat)
Amplifier ctrl
Battery
Body control module (bcm) (right of glove box)
Bus +
Bus -
Computer data lines system
Cruise control system
Ctrl sig
F cen spkr (+)
F cen spkr (-)
Front center speaker
G305 (under driver's seat)
Ground
Hot at all times
Inflatable restraint steering wheel module coil (top of steering column)
Info
Left front door speaker
Left front tweeter speaker
Left rear door speaker
Left rear speaker
Lf low level (-)
Lf low level sig
Lf speaker (+)
Lf spkr sig (-)
Lr low level (-)
Lr low level sig
Lr mid spkr (+)
Lr mid spkr (-)
Lr speaker (-)
Lr spkr sig (+)
Module coil) s220
Mute
Pnk
Rear fuse block (below left side of rear seat)
Rf low level (-)
Rf low level sig
Rf speaker (+)
Rf spkr sig (-)
Right front door speaker
Right front tweeter speaker
Right rear door speaker
Right rear speaker
Right steering wheel control switch
Rr low level (-)
Rr low level sig
Rr mid spkr (+)
Rr mid spkr (-)
Rr speaker (+)
Rr spkr sig (-)
S361 (in body harness, between c300 & amplifier)
S362 (in body harness, between c300 & amplifier)
S363 (in body harness, between c301 & amplifier)
S364 (in body harness, between c301 & amplifier)
S365
S366
Seek dn
Seek up
Source
Sply volt
Tan
Tan/red
Volume dn
Volume up

Radio Wiring Diagram, without Amplifier for Buick Lucerne CXS 2007

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List of elements for Radio Wiring Diagram, without Amplifier for Buick Lucerne CXS 2007:

(between cruise control on/off switch & inflatable restraint steering wheel module coil)
(in body harness, between c300 & amplifier) s361
(in body harness, between c301 & amplifier) s363
(on right front of trunk, attached to seat back brace) (if equipped) vehicle communication interface module (vcim)
14v sw sply volt
14v sw sply voltage
Antenna sig
Antenna signal
Anti-lock brakes system
Audio common sig
Audio communication sig
Backlight lamp ctrl
Battery
Body control module (bcm) (right of glove box)
Bus +
Bus -
Coaxial cable
Computer data lines system
Cruise control system
Ctrl sig
Device left audio sig
Drain wire
G305 (under driver's seat)
Gps antenna
Gps antenna (under top center of dash)
Ground
Hot at all times
Inflatable restraint steering wheel module coil (top of steering column)
Info
Interior lights system
Left front door speaker
Left front spkr (+)
Left front spkr sig (-)
Left front tweeter speaker
Left rear speaker
Lr midrange speaker (-)
Lr midrange spkr (+)
Mute
Navigation system
Navigation voice sig
Pnk
Radio
Radio antenna module (at right "d" pillar)
Rdo fuse f21 15a
Rear fuse block (below left side of rear seat)
Right front door speaker
Right front spkr (+)
Right front spkr sig (-)
Right front tweeter speaker
Right rear speaker
Right steering wheel control switch
Rr midrange spkr (+)
Rr midrange spkr (-)
S362 (in body harness, between c300 & amplifier)
S364 (in body harness, between c301 & amplifier)
Seek dn
Seek up
Source
Speed gmlan serial data
Sply volt
Tan
Vehicle speed sig
Volume dn
Volume up

SHIFT INTERLOCK

Shift Interlock Wiring Diagram for Buick Lucerne CXS 2007

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List of elements for Shift Interlock Wiring Diagram for Buick Lucerne CXS 2007:

3.8l
4.6l
5 volt ref
A/t shift lock control solenoid
Automatic transmission
Body control module (bcm) (right of glove box)
Brake pedal position sensor (top of brake pedal assembly)
Column shifter shift lock control solenoid
Computer data lines system
D n
Data bus +
Data bus -
Engine control module (ecm) (4.6l) (left side of engine compt)
Floor shifter assembly (w/ custom seat)
G112 (lower left rear of engine)
G300 (under driver's seat)
G304 (under right front passenger's seat)
Hot in run or start
Htd/cool/ ign 3 fuse 10a
Ignition lock cylinder solenoid
Interior lights system
Low ref
Park switch
Powertrain control module (pcm) (3.8l) (left front of engine compt, inside air cleaner housing)
Prndl lamp
Range sig a
Range sig b
Range sig c
Range sig p
Rear fuse block (below left side of rear seat)
Reverse lockout solenoid
S105
S204
S302 (w/ climate control seats)
S381
S383
Sensor sig
Shftr sol fuse 10a
Sol ctrl
Supp volt
Switch signal a
Switch signal b
Switch signal c
Switch signal p
Tan
Transmission control module (tcm) (4.6l: left rear of engine compt)
Transmission internal mode switch (ims)
W/ custom seat/ floor shifter
W/ individual seat/ column shifter

STARTING/CHARGING

Charging Wiring Diagram for Buick Lucerne CXS 2007

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List of elements for Charging Wiring Diagram for Buick Lucerne CXS 2007:

3.8l
4.6l
Battery
Battery current sensor (below right side of rear seat)
Battery ind
Battery positive volt
Body control module (bcm) (right of glove box)
Computer data lines system
Current sensor low ref
Current sensor sig
Fusible link
G303 (below right side of rear seat)
Gen f-term
Gen l-term
Generator
Ground
Hi speed gmlan serial data +
Hi speed gmlan serial data -
Ign
Instrument panel cluster (ipc)
Lo spd gmlan serial data
Logic
Powertrain control module (pcm) (3.8l) engine control module (ecm) (4.6l) (4.6l: left side of engine compt) (3.8l: left front of engine compartment, inside air cleaner housing)
Rear fuse block (below left side of rear seat)
Red
Rvc sense fuse 10a
Serial data
Starter motor
Tan
Underhood fuse block (on right front of engine compt, forward of strut tower)

Starting Wiring Diagram for Buick Lucerne CXS 2007

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List of elements for Starting Wiring Diagram for Buick Lucerne CXS 2007:

(3.8l)
(4.6l)
3.8l
4.6l
Acc
Automatic transmission
Battery
Body control module (bcm) (right of glove box)
Charging circuit
Computer data lines system
Crank fuse 40a
Crank relay 3
Ecm ign 3 fuse 10a
Ecm/ crank fuse 15a
G112 (lower left rear of engine)
G303 (below right side of rear seat)
Ground distribution system
Hi speed gmlan serial data +
Hi speed gmlan serial data -
Hot at all times
Hot w/ powertrain relay energized
Ign 1 vol
Ign sw fuse 5a
Ignition switch
Internal mode switch (ims)
Off
Park/neutral sig
Pnk
Powertrain control module (pcm) (3.8l) engine control module (ecm) (4.6l) (4.6l: left side of engine compt) (3.8l: left front of engine compartment, inside air cleaner housing)
Rear fuse block (below left side of rear seat)
Red
Run
Run/crank ign 1 vol
Run/crank relay 6
S101
S105
Start
Starter ctrl
Starter motor
Tan
Underhood fuse block (on right front of engine compt, forward of strut tower)

SUPPLEMENTAL RESTRAINTS

Supplemental Restraints Wiring Diagram (1 of 2) for Buick Lucerne CXS 2007

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List of elements for Supplemental Restraints Wiring Diagram (1 of 2) for Buick Lucerne CXS 2007:

(in body harness, approximately 42 cm (17 in) from breakout for yaw & lateral acceleration sensor) s370
(in steering wheel) inflatable restraint steering wheel module
(right side of dash) inflatable restraint i/p module
(under right front
A1 c3
Air bag ign 3 fuse 4 10a
Batt positive vol
Case ground
Computer data lines system
Ground
High control
Hot w/ run/crnk relay energized
Ign 1 vol
Inflatable restraint sensing & diagnostic module (sdm) (under center console)
Inflatable restraint steering wheel module coil (top of steering column)
Left inflatable restraint front end sensor (left front of engine compartment)
Left inflatable restraint side impact module (left side of driver's seat back)
Left inflatable restraint side impact sensor (sis) (base of left "b" pillar)
Left seat belt switch
Low control
Low reference
Low speed
Nca
Passenger's seat) g302
Pin shorting bars engaged
Pnk
Pnk/ red
Pnk/red
Right inflatable restraint front end sensor (right front of engine compartment)
Right inflatable restraint seat position sensor (sps) (on front passenger's seat left seat rail)
Right inflatable restraint side impact module (right side of front passenger's seat back)
Right inflatable restraint side impact sensor (sis) (base of right "b" pillar)
Right seat belt switch
Sensor signal
Sensor voltage
Shorting bar
Stage 1
Stage 2
Switch signal
Tan
Tan/ pnk
Tan/pnk
Underhood fuse block (on right front of engine compt, forward of strut tower)
When module connector is disconnected from harness: (shorting bars are connected between following pins: 20-21 & 22-23)

Supplemental Restraints Wiring Diagram (2 of 2) for Buick Lucerne CXS 2007

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List of elements for Supplemental Restraints Wiring Diagram (2 of 2) for Buick Lucerne CXS 2007:

(left rear of luggage compt) g402
(under driver's seat) g300
Air bag fuse 13 10a
Air bag ind
Batt positive vol
Computer data lines system
Gmlan (sdm)
Ground
Hot at all times
Ign
Inflatable restraint i/p module indicator
Inflatable restraint passenger presence system (pps) module (under front passenger's seat)
Inflatable restraint passenger presence system (pps) sensor (under right side of front passenger's seat)
Inflatable restraint passenger seat belt tension retractor sensor (bottom of right "b" pillar)
Instrument panel cluster (ipc)
Left front seat belt pretensioner
Left inflatable restraint roof rail module (if equipped) (left roof rail)
Logic
Low reference
Nca
Off ind
On ind
Pass air bag off ind ctrl
Pass air bag on ind ctrl
Pass seat belt ind
Passenger air bag ind
Pnk
Pnk/ red
Pnk/red
Pnk/tan
Rear fuse block (below left side of rear seat)
Right front seat belt pretensioner
Right inflatable restraint roof rail module (if equipped) (right roof rail)
S312 (in headliner harness, approximately 10 cm (4 in) from branch for c321)
Seat belt ind
Sensor signal
Serial data
Shorting bar
Tan
Voltage reference

TRANSMISSION

3.8L VIN 2

3.8L VIN 2, A/T Wiring Diagram for Buick Lucerne CXS 2007

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List of elements for 3.8L VIN 2, A/T Wiring Diagram for Buick Lucerne CXS 2007:

(approximately 59 cm (24 in) from left front wheel speed sensor)
(left rear of engine)
(lower left rear of engine) g112
(not used)
1-2 shift sol
1-2 shift solenoid valve
2-3 shift sol
2-3 shift solenoid valve
5 volt ref 2
A/t fluid pressure manual valve position switch
A/t fluid temperature sensor
A/t input shaft speed sensor
At iss sig high
At iss sig low
Automatic transmission
Battery
Code a
Code b
Code c
Ecm ign 3 fuse f5 10a
Ecm/ tcm fuse f28 15a
Ect sensor sig
Engine coolant temperature sensor
Exterior lights system
Hot at all times
Hot in run or start
Hot w/ run crank relay r6 energized
Ignition 1
Low ref
Manifold absolute pressure sensor (on top front of engine)
Map sensor sig
P/n
Parity
Pc sol high
Pc sol low
Pnk
Powertrain control module (left front of engine compt, inside air cleaner housing)
Pressure control solenoid valve
Rear fuse block (below left side of rear seat)
Red a
Red s115
Stop lmp sw sig
Tan
Tan b
Tcc sol
Tcc sw sig
Tft sensor sig
Torque converter clutch solenoid valve
Tr sig a
Tr sig b
Tr sig c
Tr sig p
Trans ign 3 fuse f6 10a c3
Transmission internal mode switch
Underhood fuse block (on right front of engine compartment, forward of strut tower)
Vehicle speed sensor (in transmission)
Vss sig high
Vss sig low

4.6L VIN Y

4.6L VIN Y, A/T Wiring Diagram for Buick Lucerne CXS 2007

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List of elements for 4.6L VIN Y, A/T Wiring Diagram for Buick Lucerne CXS 2007:

(approximately 41 cm (16 in) from underhood fuse block connector c3) s111
(in engine harness,
(in steering column harness, between c203 & ignition switch connector)
(in transmission) vehicle speed sensor
(right of glove box) body control module
Acc
Approximately 13 cm (5 in) from breakout for c138)
Automatic transmission
Automatic transmission input shaft speed sensor
Battery
Computer data lines system
Ecm/tcm fuse f28 15a
Engine control module (left side of engine compartment)
Exterior lights system
G112 (lower left rear of engine)
Gmlan serial data
Ground
Hot at all times
Hot in run or start
Ign 1
Ignition switch
Iss high sig
Iss low sig
Low ref
Nca
Off
P/n
P/n signal
Pc sol hi ctrl
Pc sol vlv ctrl
Pnk
Pressure control solenoid valve
Rear fuse block (below left side of rear seat)
Run
S100 (in engine harness, approximately 80 cm (31 in) from underhood fuse block connector c3)
S104
S201
Ser data
Serial data
Serial data bus+
Serial data bus-
Shift sol valve a
Shift sol valve b
Shift sol vlv a
Shift sol vlv b
Start
Stop lamp sw sig
Tan
Tcc sol ctrl
Tcc sol valve
Tft sens sig
Trans ign 3 fuse f6 10a
Trans range a
Trans range b
Trans range c
Trans range p
Transmission control module (tcm) (left rear of engine compartment)
Transmission fluid temperature sensor
Transmission internal mode switch
Underhood fuse block (on right front of engine compartment, forward of strut tower)
Vss hi sig
Vss low sig

TRUNK, TAILGATE, FUEL DOOR

Trunk Release Wiring Diagram for Buick Lucerne CXS 2007

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List of elements for Trunk Release Wiring Diagram for Buick Lucerne CXS 2007:

(under driver's seat) g300
Body control module (bcm) (right of glove box)
G301 (under left rear seat)
G402 (left rear of luggage compt)
Hot at all times
Interior lights system
Rear compartment lid latch (center rear of luggage compt)
Rear compartment lid release switch
Rear fuse block (below left side of rear seat)
S203
Trunk ajar sw sig c6
Trunk release ctrl c2
Trunk release relay ctrl c7
Trunk relse relay r6

WARNING SYSTEMS

Warning Systems Wiring Diagram for Buick Lucerne CXS 2007

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List of elements for Warning Systems Wiring Diagram for Buick Lucerne CXS 2007:

(w/ rke) keyless entry antenna
Acc
Air bag ign 3 fuse f4 10a
Audible alarm
Auto
Battery positive volt
Body control module (bcm) (right of glove box)
Check tire pressure service tire monitor
Chmsl/ bck-up fuse f18 10a
Coax
Computer data lines system
Driver door latch assembly (rear of driver's door)
Driver door module (ddm)
Exterior lights system
G304 (under right front passenger's seat)
G306 (at left "c" pillar)
Gmlan
Gmlan serial data
Gmlan serial data gmlan serial data
Ground
Head
Headlamp switch
Hot at all times
Hot w/ run crank relay r6 energized
Ign
Ign swtch fuse f48 5a
Ignition switch
Inflatable restraint i/p module indicator
Inflatable restraint sensing & diagnostic module (under center console)
Instrument panel cluster (ipc)
Ipc
Key-in ignition switch
Keyless entry/ tire pressure antenna signal
Left front tire pressure sensor
Left rear tire pressure sensor
Left seat belt buckle
Left seat belt switch
Lf door ajar sw sig
Lf door open sw sig
Lf door sw low ref
Lf seat belt sw sig
Logic
Low ref
Low spd serial data
Low tire pressure indicator
Lt trn/ sig fuse f15 15a
Lt turn sig switch
Message center
Message request
Nca
Off
Off/run crank vol
Park
Park lp sw sig
Passenger seat belt ind
Pnk
Pnk/ red
Radio
Rear fuse block (below left side of rear seat)
Remote control door lock receiver (rcdlr) (under center of rear package shelf)
Rf seat belt sw sig
Right front tire pressure sensor
Right rear tire pressure sensor
Right seat belt buckle
Right seat belt switch
Rr trn/ sig fuse f16 15a
Rt turn sig switch
Run
S206
S370 (in body harness, approximately 42 cm (17 in) from breakout for yaw & lateral acceleration sensor)
S385
Seat belt indicator
Serial data
Solid state
Start
Tan/ pnk
Tan/pnk
Underhood fuse block (on right front of engine compartment, forward of strut tower)
W/ theft deterrent system
W/o theft deterrent system

WIPER/WASHER

Wiper/Washer Wiring Diagram for Buick Lucerne CXS 2007

Get access to all wiring diagrams of the car

List of elements for Wiper/Washer Wiring Diagram for Buick Lucerne CXS 2007:

Acc volt
Batt pos volt
Body control module (bcm) (right of glove box)
Check washer fluid
Delay switch
Fluid ind ctrl
Fluid sw sig
G101 (left front corner of engine compt)
G104 (right front corner of engine compt)
G300 (under driver's seat)
G304 (under right front passenger's seat)
G402 (left rear of luggage compt)
Ground
Heated washer fluid ind ctrl
Heated washer fluid switch
Heated washer fluid washer sys off
High
High speed rly ctrl
Hot at all times
Hot in run or start
Htd/ cool ign 3 fuse f47 10a
Instrument panel cluster (ipc)
Int
Logic
Low
Low washer fluid ind sig
Message center
Mist
Off
Outside moisture sensor (if equipped) (above rearview mirror on windshield)
Park sw sig
Park switch
Pnk
Power distribution system
Rap fuse f41 10a
Rear fuse block (below left side of rear seat)
Run ign 3 volt
S204
S312
S382
Sen sig 1
Sen sig 2
Sensor signal 1
Sensor signal 2
Tan
Turn signal/multi-function switch
Underhood fuse block (on right front of engine compt, forward of strut tower)
Washer rly ctrl
Washer sw sig
Washer switch
Windshield washer fluid level switch (bottom of windshield washer fluid reservoir)
Windshield washer fluid pump (bottom of windshield washer fluid reservoir)
Windshield washer solvent heater (w/ heated nozzles)
Windshield wiper motor (on left side of firewall)
Wiper rly ctrl
Wiper sw high sig
Wiper sw low sig
Wiper switch
Wpr fuse f18 25a
Wpr hi relay r10
Wpr relay r8
Wsh pcb relay
Wsw htd fuse jc1 60a
Wsw/ pump fuse f12 15a