All Wiring Diagrams for Buick Lucerne CX 2009

AIR CONDITIONING

Automatic A/C Wiring Diagram (1 of 2) for Buick Lucerne CX 2009

List of elements for Automatic A/C Wiring Diagram (1 of 2) for Buick Lucerne CX 2009:

• (in i/p harness, approximately 41 cm (16 in) from branch for hazard lamp switch) j210
• (lower left rear of engine)
• (under driver's seat) g300
• (under right front passenger's seat) g304
• 3.9l
• 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)
• 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)
• Computer data lines system
• Defogger system
• Driver information center (dic) display
• Drv air temp dr ctrl a
• Drv air temp dr ctrl b
• Drv air temp dr pos sig
• Evap low temp sens sig
• Evap temperature sensor (left of blower motor)
• G112
• G115
• G300 (under driver's seat)
• Gmlan serial data
• Gnd
• Hot at all times
• Hvac control module
• Ign 1 volt
• Inside air temp sens sig
• Inside air temperature sensor (under left side of dash, left of steering column)
• Instrument panel cluster (ipc)
• Interior lights system
• J106
• J200
• J202
• J203
• J250
• J387
• L sunload sens sig
• Led dimming sig
• Logic
• Low ref
• Low speed gmlan serial data
• Lower mode dr ctrl b
• Lower mode dr pos sig
• Mode door control a
• Mtr fuse 48 10a
• Pass air temp dr ctrl a
• Pass air temp dr ctrl b
• Pass air temp dr pos
• Passkey fuse 13 10a
• Pnk
• Power distribution system
• R sunload sens sig
• 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)
• Speed ctrl
• Sunload twilight sensor (top center of dash)
• Tan
• X4 b

Automatic A/C Wiring Diagram (2 of 2) for Buick Lucerne CX 2009

List of elements for Automatic A/C Wiring Diagram (2 of 2) for Buick Lucerne CX 2009:

• (in hvac harness, between evaporator temperature sensor & x202) j227
• (in hvac harness, between hvac control module & mode motors)
• (left side of engine compt) engine control module (ecm)
• (or tan)
• 3.9l
• 4.6l
• 5v ref 1
• 87a
• A/c cltch fuse 4 10a
• A/c cltch relay 34
• A/c refrigerant pressure sensor (near a/c compressor, on hose assembly)
• Clutch rly ctrl
• Computer data lines system
• Driver air temperature actuator (left side of hvac module)
• Ect sens sig
• Engine coolant temperature (ect) sensor (3.9l: rear of left cylinder bank) (4.6l: right rear of engine)
• Fan 1 fuse 27 30a
• Fan 1 relay
• Fan 2 fuse 26 30a
• Fan 2 relay
• Fan 3 relay
• 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 at all times
• Hot w/ ign relay energized
• Hot w/ pwr/trn relay energized
• Hvac/ ipc ign 1 fuse 10 10a
• J226
• Left cooling fan (on left rear side of radiator)
• Low ref
• Low speed rly ctrl
• Mode actuator (on right side of hvac module)
• Oxy snsr fuse 6 15a
• Pnk
• Press sens sig
• Right cooling fan (on right rear side of radiator)
• Tan
• Underhood fuse block (on right front of engine compt, forward of strut tower)

Compressor Wiring Diagram for Buick Lucerne CX 2009

List of elements for Compressor Wiring Diagram for Buick Lucerne CX 2009:

• (lower left rear of engine)
• 3.9l
• 4.6l
• 4.6l 3.9l
• 5 volt ref 1
• A/c cltch fuse 4 10a
• A/c cltch relay
• A/c compressor clutch (on a/c compressor)
• A/c refrigerant pressure sensor (near a/c compressor, on hose assembly)
• Clutch rly ctrl
• Computer data lines system
• Engine control module (ecm) (left side of engine compt)
• G112
• G115
• Gmlan serial data +
• Gmlan serial data -
• Hot at all times
• Hot w/ pwr/trn relay energized
• J106
• Low ref
• 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 CX 2009

List of elements for Manual A/C Wiring Diagram (1 of 2) for Buick Lucerne CX 2009:

• (in hvac harness, between evaporator temperature sensor & x202)
• (in hvac harness, between hvac control module & mode motors)
• (in i/p harness, approximately 41 cm (16 in) from branch for hazard lamp switch) j210
• (under right front passenger's seat) g304
• 5 volt ref
• A/c compressor clutch (on a/c compressor)
• A/c high pres reur sw sig
• Air temp dr ctrl
• 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 fuse 49 40a
• Blower motor (behind right side of dash)
• Blower motor control module (near blower motor)
• Computer data lines system
• Defogger system
• 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 at all times
• Hvac control module
• Ign 1 volt
• Interior lights system
• J200
• J203
• J226
• J227
• J387
• 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
• Passkey fuse 13 10a
• Pnk
• Power distribution system
• Rear defog rly ctrl
• Rear fuse block (below left side of rear seat)
• Recirculation actuator (behind right side of dash, right of blower motor)
• Sensor signal
• Speed ctrl
• Tan
• X4 b

Manual A/C Wiring Diagram (2 of 2) for Buick Lucerne CX 2009

List of elements for Manual A/C Wiring Diagram (2 of 2) for Buick Lucerne CX 2009:

• (under driver's seat) g300
• 5v ref 1
• 87a
• A/c cltch fuse 4 10a
• A/c cltch relay 34
• A/c refrigerant pressure sensor (near a/c compressor, on hose assembly)
• Accessory wake up
• Ambient light sensor (center of dash, in defroster deflector)
• Body control module (bcm) (right of glove box)
• Clutch rly ctrl
• Computer data lines system
• Ect sens sig
• Engine control module (ecm) (left side of engine compt)
• Engine coolant temperature (ect) sensor (rear of left cylinder bank)
• Fan 1 fuse 27 30a
• Fan 1 relay
• Fan 2 fuse 26 30a
• Fan 2 relay
• Fan 3 relay
• G104 (right front corner of engine compt)
• Gmlan serial data +
• Gmlan serial data -
• Hi speed rly ctrl
• Hot at all times
• Hot w/ ign relay energized
• Hot w/ pwr/trn relay energized
• Hvac/ipc ign 1 fuse 10 10a
• J104 (in engine harness, approximately 13 cm (5 in) from breakout for x138)
• J203
• J229
• Left cooling fan (on left rear side of radiator)
• Low ref
• Low speed rly ctrl
• Oxy snsr fuse 6 15a
• Pnk
• Press sens sig
• Right cooling fan (on right rear side of radiator)
• Tan
• Transmission control module (tcm)
• 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 CX 2009

List of elements for Anti-lock Brakes Wiring Diagram (1 of 2) for Buick Lucerne CX 2009:

• (base of steering column) (w/ active brake control) steering angle sensor
• (not used)
• (on floor pan, left of center console) (w/ active brake control) yaw & lateral acceleration sensor
• 5v ref
• Abs fuse 23 50a
• Abs ind
• Abs mtr fuse 25 60a
• Batt pos volt
• Brake fluid level switch (on master cylinder reservoir)
• Brake pressure modulator valve (bpmv)
• Computer data lines system
• Electronic brake control module (ebcm) (left front corner of engine compt)
• Electronic power steering system
• G114 (lower left rear of engine)
• G300 (under driver's seat)
• Gmlan (bcm)
• Gmlan (ebcm)
• Ground
• High effort ctrl
• Hot at all times
• Hot w/ ign relay energized
• Hvac/ ipc ign 1 fuse 10 10a
• Ign
• Ign 1 volt
• Instrument panel cluster (ipc)
• Lateral accel- remitter sig
• Lateral accelerometer sig
• Logic
• Long accel- erometer sig
• Long accelerometer signal
• Low effort ctrl
• Low ref
• Low reference
• Pnk
• Position signal a
• Position signal b
• Power distribution system
• Radio
• Red
• Sensor signal
• Serial data
• Serial data (+)
• Serial data (-)
• Serial data wake up
• 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 CX 2009

List of elements for Anti-lock Brakes Wiring Diagram (2 of 2) for Buick Lucerne CX 2009:

• (in engine harness, approximately 47 cm (19 in) from right front wheel speed sensor) j114
• (in engine harness, approximately 53 cm (21 in) from left front wheel speed sensor) j113
• (in engine harness, approximately 53 cm (21 in) from right front wheel speed sensor) j116
• Body control module (bcm) (right of glove box)
• Brake pedal position sensor (top of brake pedal assembly)
• Computer data lines system
• J115 (in engine harness, approximately 59 cm (24 in) from left front wheel speed sensor)
• 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
• Park brake switch (on top of park brake assembly)
• 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)
• Sensor signal
• Serial data
• Serial data (+)
• Serial data (-)
• Serial data wake up
• Supp volt
• Tan
• Tan a

ANTI-THEFT

Forced Entry Wiring Diagram for Buick Lucerne CX 2009

List of elements for Forced Entry Wiring Diagram for Buick Lucerne CX 2009:

• (if equipped) keyless entry antenna
• (in body harness, approximately 9 cm (3 in) from branch for x314) j343
• (under center of rear package shelf) remote control door lock receiver (rcdlr)
• (under left rear seat) g301
• A11
• A12
• Battery
• Body control module (bcm) (right of glove box)
• Coax
• Computer data lines system
• Ddm fuse 22 15a
• Dr lock act ctrl
• 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)
• G406 (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)
• J301
• J337
• J385
• J700
• J800
• 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
• Lock relay 63
• Logic
• Low spd gmlan ser data
• Lr dr ajar sw sig
• Lr dr lk mtr unlock
• Lr dr open sw sig
• Mdls- body fuse 43 10a
• Nca
• Park lamp rly ctrl
• Pdm fuse 29 15a
• Pwr wdo circuit breaker 25a
• 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 lk mtr unlock
• Security ind
• Serial data
• Tan
• Tan/ red
• Tan/red
• Unlock relay 62
• Unlock/ lock fuse 14 20a
• W/ theft deterrent system
• W/o theft deterrent system

Pass-Key Wiring Diagram for Buick Lucerne CX 2009

List of elements for Pass-Key Wiring Diagram for Buick Lucerne CX 2009:

• Acc
• Acc volt
• Battery
• Computer data lines system
• G300 (under driver's seat)
• Ground
• Hot at all times
• Ign
• Ignition switch
• Instrument panel cluster (ipc)
• J201
• J204
• Logic
• Low spd gmlan ser data
• Off
• Passkey fuse 13 10a
• Power distribution system
• Rear fuse block (below left side of rear seat)
• Run
• Security ind
• Serial data
• Start
• Theft deterrent module (tdm) (in steering column)

BODY CONTROL MODULES

Body Control Modules Wiring Diagram (1 of 3) for Buick Lucerne CX 2009

List of elements for Body Control Modules Wiring Diagram (1 of 3) for Buick Lucerne CX 2009:

• 12v reference
• Acc wakeup serial data
• Anti-lock brakes system
• Backlight lamp control
• Battery
• Battery pos voltage
• Bcm (chmsl) fuse 39 10a
• Bcm (ctsy) fuse 35 10a
• Bcm (inadv) fuse 32 10a
• Bcm (lttn) fuse 25 15a
• Bcm (rttn) fuse 36 15a
• Bcm fuse 19 10a
• Bcm fuse 40 10a
• Body control module (bcm) (right of glove box)
• Computer data lines system
• Cruise control system
• Cruise ctr ind dimming sig
• Door locks system
• Drl relay ctrl
• E12
• 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
• I/p dimming sig
• Interior lights system
• J206
• Led dimming signal
• Left lamp relay ctrl
• Low gmlan serial data
• Low reference
• 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
• Run/crank ign 1 volt
• Tan
• Tan/ pnk
• Tan/pnk
• Washer relay ctrl
• Wiper mtr park sw sig
• Wiper/washer system
• X2 b11
• X2 e2
• X3 c8

Body Control Modules Wiring Diagram (2 of 3) for Buick Lucerne CX 2009

List of elements for Body Control Modules Wiring Diagram (2 of 3) for Buick Lucerne CX 2009:

• 12v reference
• 5v ref
• A/t shift lck sply volt
• Acc
• Accessory volt
• Ambient light sns sig
• Anti-lock brakes system
• Battery pos voltage
• Bcm (dim) fuse 18 10a
• Body control module (bcm) (right of glove box)
• Column radio ctrl signal
• Courtesy lamp ctrl
• Courtesy lamp sw on sig
• Cruise control system
• E12
• Exterior lights system
• Flash to pass sw sig
• Ground
• Hazard sw sig
• Headlamp sw hi beam sig
• Headlamp sw off sig
• Headlights system
• Hot at all times
• Ignition 1 voltage
• Ignition switch
• Interior lights system
• J201
• Key-in switch
• Left turn sig sw sig
• Off
• Off/run crank voltage
• Park lamp sw on sig
• Pnk
• Rear fuse block (below left side of rear seat)
• Remote radio ctrl acc
• Right turn sig sw sig
• Run
• Set/coast resume/accel
• Shift interlock sol ctrl
• Shift interlock system
• Start
• 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 CX 2009

List of elements for Body Control Modules Wiring Diagram (3 of 3) for Buick Lucerne CX 2009:

• 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
• Dr lock motor lock ctrl
• Dr lock motor unlock ctrl
• 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
• Lf turn sig sply volt
• Low beam relay ctrl
• Low gmlan serial data
• Lr door ajar sw sig
• 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 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 CX 2009

List of elements for Computer Data Lines Wiring Diagram (1 of 2) for Buick Lucerne CX 2009:

• (if equipped) right side object sensor
• (in engine harness, approximately 13 cm (5 in) from breakout for x138) j104
• (under center console) inflatable restraint sensing & diagnostic module (sdm)
• 3.9l (vin 1)
• 4.6l (vin 9)
• A6 x3
• Acc wake up data
• 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) (w/ digital audio system s-band) (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)
• G (not used)
• Hi spd serial data +
• Hi spd serial data -
• J (not used)
• Left side object sensor
• Low spd serial data
• Rear object sensor control module (w/ parking assist)
• Remote control door lock receiver (rcdlr) (under center of rear package shelf)
• Serial data wake up
• Splice pack jx300 (in passenger compt under rear seat near rear fuse block)
• Tan
• Transmission control module (tcm) (4.6l: left rear of engine compartment)
• Underhood fuse block (on right front of engine compt, forward of strut tower)
• Vehicle communication interface module (vcim) (w/ onstar) (on right front of trunk, attached to seat back brace)
• Vehicle direction alert alarm warning module (w/ lane departure warning sensor indicator)
• W/ magnetic ride control
• W/ soft ride suspension system
• X2 a2

Computer Data Lines Wiring Diagram (2 of 2) for Buick Lucerne CX 2009

List of elements for Computer Data Lines Wiring Diagram (2 of 2) for Buick Lucerne CX 2009:

• (in i/p harness, approximately 12 cm (5 in) from data link connector) j208
• Body control module (bcm) (right of glove box)
• C10 tan
• Climate control seat module
• Data link connector (dlc) (under left side of dash)
• Driver door control module
• G300 (under driver's seat)
• Hi spd serial data +
• Hi spd serial data -
• Hot at all times
• Hvac control module
• Inflatable restraint passenger presence system (pps) module (under front passenger's seat)
• Instrument panel cluster (ipc)
• J200
• J202
• J203
• J207 (in i/p harness, approximately 17 cm (7 in) from data link connector)
• Kw 2000 serial data
• Low spd serial data
• Memory seat module (on underside of driver's seat, on seat adjuster frame)
• Passenger door control module
• Passkey fuse 13 10a
• Radio
• Rear fuse block (below left side of rear seat)
• Run/acc
• Serial data wake up
• Tan
• Theft deterrent module (tdm) (in steering column)

COOLING FAN

Cooling Fan Wiring Diagram for Buick Lucerne CX 2009

List of elements for Cooling Fan Wiring Diagram for Buick Lucerne CX 2009:

• (or tan)
• 3.9l
• 4.6l
• 87a
• Computer data lines system
• Ect sens sig
• Engine control module (ecm) (left side of engine compt)
• Engine coolant temperature (ect) sensor (3.9l: rear of left cylinder bank) (4.6l: right rear of engine)
• Fan 1 fuse 27 30a
• Fan 1 relay
• Fan 2 fuse 26 30a
• Fan 2 relay
• Fan 3 relay
• G104 (right front corner of engine compt)
• Gmlan serial data +
• Gmlan serial data -
• Hi speed rly ctrl
• Hot at all times
• Hot w/ pwr/ trn relay energized
• Left cooling fan (on left rear side of radiator)
• Low ref
• Low speed rly ctrl
• Oxy snsr fuse 6 15a
• Pnk
• 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 CX 2009

List of elements for Cruise Control Wiring Diagram for Buick Lucerne CX 2009:

• (or tan)
• 3.9l
• 4.6l
• 5v ref
• 5v ref 2
• Accelerator pedal position (app) sensor (top of accelerator pedal assembly)
• App sns sig
• B2 x2
• Batt pos volt
• Bcm (lttn) fuse 25 15a
• Body control module (bcm) (right of glove box)
• Brake pedal position sensor (top of brake pedal assembly)
• Cancel
• Computer data lines system
• Cruise control switch
• Cruise ind
• Cruise sw
• D4 x1
• D9 x2
• Driver information center (dic)
• Ecm/ tcm fuse 5 15a
• Electronic suspension system
• Engine control module (ecm) (left side of engine compt)
• G112 (lower left rear of engine)
• Gmlan (ecm)
• Gmlan serial data
• Hot at all times
• Hot w/ ign relay energized
• Hvac/ ipc ign 1 fuse 10 10a
• Ign
• Ign 1 vol
• Ind dimming sig
• Inflatable restraint steering wheel module coil (top of steering column)
• Instrument panel cluster (ipc)
• J100
• J105
• J220 (in steering column harness, between cruise control on/off switch & inflatable restraint steering wheel module coil)
• Left steering wheel control switch
• Logic
• Low ref
• Nca
• On ind
• Oss high sig
• Oss low sig
• Pnk
• Pnk/red
• Power distribution system
• Rear fuse block (below left side of rear seat)
• Res +
• Res/acc sw sig
• Sens sig
• Serial data +
• Serial data -
• Serial data bus +
• Serial data bus -
• Serial data wake up
• Set -
• Sig gnd
• Sound systems
• Tac mtr ctrl 1
• Tac mtr ctrl 2
• Tan
• Throttle body (top rear of engine)
• Tp sns 1 sig
• Tp sns 2 sig
• Transmission control module (left rear of engine compt)
• Transmission control module (tcm) (left rear of engine compt)
• Underhood fuse block (on right front of engine compt, forward of strut tower)
• Vehicle speed sensor (vss) (in transmission)
• X276
• X277

DEFOGGERS

Defoggers Wiring Diagram for Buick Lucerne CX 2009

List of elements for Defoggers Wiring Diagram for Buick Lucerne CX 2009:

• Computer data lines system
• Defogger on 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)
• G406 (left "c" pillar)
• G407 (right "c" pillar)
• Ground
• Heated mirror element
• Hot at all times
• Hvac control module
• J385
• Logic
• Low reference
• Low spd gmlan serial data
• Nca
• Rear defog relay 52
• Rear defog rly ctrl
• Rear defogger switch
• Rear fuse block (below left side of rear seat)
• Rear window defogger
• Rr defog fuse 46 40a
• Sply voltage
• Tan/pnk

ELECTRONIC POWER STEERING

Electronic Power Steering Wiring Diagram for Buick Lucerne CX 2009

List of elements for Electronic Power Steering Wiring Diagram for Buick Lucerne CX 2009:

• 5v ref
• Abs fuse 23 50a
• Abs mtr fuse 25 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 (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 Damper Control Wiring Diagram for Buick Lucerne CX 2009

List of elements for Electronic Damper Control Wiring Diagram for Buick Lucerne CX 2009:

• (right front wall of luggage compt) g403
• Automatic level control (alc) compressor (rear underside of vehicle)
• Batt
• Battery voltage
• C10 nca
• Comp relay fuse 24 10a
• Computer data lines system
• Driver information center (dic)
• Electronic suspension control (esc) module (behind right wheelwell)
• G403 (right front wall of luggage compt)
• Gmlan ser data +
• Gmlan ser data -
• Ground
• Hot at all times
• Instrument panel cluster (ipc)
• Ipc class 2
• J126 (in body harness, approximately 60 cm (24 in) from left front strut actuator)
• J127 (in body harness, approximately 65 cm (25 in) from left front strut actuator)
• J128 (in body harness, approximately 60 cm (24 in) from right front strut tan actuator)
• J129 (in body harness, approximately 65 cm (25 in) from right front strut actuator)
• J200
• 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)
• Level comp fuse 47 40a
• Level comp relay
• 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
• Mdl-rtd fuse 15 25a
• Message request
• Nca
• Passkey fuse 13 10a
• 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
• Serial data
• Solenoid ctrl
• Tan

Electronic Level Control Wiring Diagram for Buick Lucerne CX 2009

List of elements for Electronic Level Control Wiring Diagram for Buick Lucerne CX 2009:

• (forward 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
• Comp relay fuse 24 10a
• Computer data lines system
• Driver information center (dic)
• Gnd
• Hot at all times
• Instrument panel cluster (ipc)
• Ipc class 2
• J200
• J388
• Level comp fuse 47 40a
• Level comp relay 53
• Logic
• Message request
• Passkey fuse 13 10a
• Rear fuse block (below left side of rear seat)
• Relay ctrl
• Serial data
• Serial data +
• Serial data -
• Solenoid ctrl
• Tan

ENGINE PERFORMANCE

3.9L VIN 1

3.9L VIN 1, Engine Performance Wiring Diagram (1 of 3) for Buick Lucerne CX 2009

List of elements for 3.9L VIN 1, Engine Performance Wiring Diagram (1 of 3) for Buick Lucerne CX 2009:

• (in body harness, approximately 5 cm (2 in) from breakout for electronic suspension control module)
• (right front wall of luggage compt) g403
• (top rear of engine) evaporative emissions (evap) canister purge solenoid valve
• 5v ref
• A/c refrigerant pressure sensor (near a/c compressor, on hose assembly)
• Acc wak ser data
• Accelerator pedal position (app) sensor (top of accelerator pedal assembly)
• Air conditioning system
• App sens 1 lo ref
• App sens 2
• App sensor 1 sig
• Battery voltage
• Btsi ctrl
• Cmprsr rly ctrl
• Computer data lines system
• Cooling fan 1 crtl
• Cooling fan 2 crtl
• Ecm tcm fuse 5 15a
• Engine control module (ecm) (left side of engine compt)
• Fuel level sensor
• Fuel lvl sens sply volt
• Fuel pump & sender assembly (top of fuel tank)
• Fuel pump rly ctrl
• Fuel tank pressure (ftp) sensor (on fuel pump & sender assembly)
• Heated oxygen sensor (ho2s) 2
• Hi spd ser data
• Hot at all times
• Ign
• Ign volt
• Instrument panel cluster (ipc)
• J100
• J316
• Logic
• Low ref
• Maf sig
• Malfunction ind lp crtl
• Malfunction indicator lamp
• Motor
• Nca
• Oxygen sens hi
• Oxygen sens htr crtl
• Oxygen sens lo
• Pnk
• Press sens sig
• Pressure ind low engine oil
• Pwr/train rly
• Rear fuse block (below left side of rear seat)
• Shift interlock system
• Starter rly coil
• Starting/charging system
• Tan
• Tan/pnk

3.9L VIN 1, Engine Performance Wiring Diagram (2 of 3) for Buick Lucerne CX 2009

List of elements for 3.9L VIN 1, Engine Performance Wiring Diagram (2 of 3) for Buick Lucerne CX 2009:

• (lower left front of engine compt) secondary air injection (air) pump
• 5v ref
• Air pump fuse 22 50a
• Air pump relay
• Air sol fuse 5 15a
• Air sol relay
• Ap rly crtl
• Brk lt crtl
• Ecm/ crnk fuse 1 15a
• Ecm/ pcm fuse 9 10a
• Emis dev fuse 7 15a
• Engine control module (ecm) (left side of engine compt)
• Engine oil pressure (eop) sensor (left rear of engine)
• Evaporative emission (evap) canister vent solenoid valve (below rear of vehicle, on evap canister)
• Exterior lights system
• F/pmp fuse 1 20a
• F10
• Fuel inj even fuse 3 15a
• Fuel inj odd fuse 2 15a
• Fuel pump relay
• G112 (lower left rear of engine)
• G114 (lower left rear of engine)
• G301 (under left rear seat)
• Hot at all times
• Hot w/ ignition relay energized
• Iat sens sig
• Ign volt
• J105
• J108
• Manifold absolute pressure (map) sensor (top center of engine)
• Mass air flow (maf)/intake air temperature (iat) sensor (left side of engine compt, in air intake tube)
• Oxy snsr fuse 6 15a
• Pnk
• Pwr/trn relay 29
• Rear fuse block (below left rear seat)
• Safty sw sig
• Secondary air injection (air) pump check valve (top center of right camshaft cover)
• Sol can fuse 34 10a
• Starting/ charging system
• Tan
• Underhood fuse block (on right front of engine compt, forward of strut tower)
• Vent sol crtl

3.9L VIN 1, Engine Performance Wiring Diagram (3 of 3) for Buick Lucerne CX 2009

List of elements for 3.9L VIN 1, Engine Performance Wiring Diagram (3 of 3) for Buick Lucerne CX 2009:

• (1, 3 & 5 : top right side of engine) (2, 4 & 6 : top left side of engine) fuel injectors
• (center front of engine) camshaft position (cmp) sensor
• (lower left rear of engine) g115
• (right front of engine) camshaft position (cmp) actuator solenoid valve
• 5v ref
• Air sol 5v ref
• Air sol crtl
• Air sol low ref
• Air sol press
• Canister purge sol
• Ckp sens sig
• Cmp pos sens sig
• Crankshaft position (ckp) sensor (lower right side of engine)
• Ctrl ic1
• Ctrl ic2
• Ctrl ic3
• Engine control module (ecm) (left side of engine compt)
• Engine coolant temperature (ect) sensor (rear of left cylinder bank)
• G112 (lower left rear of engine)
• Gen duty cycle
• Gen on sig
• Gnd
• Heated oxygen sensor (ho2s) 1
• Ho2s low sig
• Ic 1 ctrl
• Ic 2 ctrl
• Ic 3 ctrl
• Ignition control module (icm) (top of right cylinder bank)
• Inj 1 ctrl
• Inj 2 ctrl
• Inj 3 ctrl
• Inj 4 ctrl
• Inj 5 ctrl
• Inj 6 ctrl
• J105
• J109
• Knock sensor (ks) 1 (left side of engine, near starter)
• Knock sensor (ks) 2 (right side of engine, below exhaust manifold)
• Ks b1 low ref
• Ks b1 sig
• Ks b2 low ref
• Ks b2 sig
• Logic
• Low ref
• Map sens 5v ref
• Map sens low ref
• Map sens sig
• Nca
• O2 sens hi
• O2 sens htr crtl
• Phaser ctrl
• Ref low
• Sens sig
• Starting/charging system
• Tan
• Tan/pnk
• Throttle body (top rear of engine)
• Throttle ctrl (cl)
• Throttle ctrl (op)
• Tp sens
• Tp sens 1 sig
• Tp sens 2
• Volt ign

3.9L VIN M

3.9L VIN M, Engine Performance Wiring Diagram (1 of 3) for Buick Lucerne CX 2009

List of elements for 3.9L VIN M, Engine Performance Wiring Diagram (1 of 3) for Buick Lucerne CX 2009:

• (in body harness, approximately 5 cm (2 in) from breakout for electronic suspension control module)
• (right front wall of luggage compt) g403
• (top rear of engine) evaporative emissions (evap) canister purge solenoid valve
• 5v ref
• A/c refrigerant pressure sensor (near a/c compressor, on hose assembly)
• Acc wak ser data
• Accelerator pedal position (app) sensor (top of accelerator pedal assembly)
• Air conditioning system
• App sens 1 lo ref
• App sens 2
• App sensor 1 sig
• Battery voltage
• Btsi ctrl
• Cmprsr rly ctrl
• Computer data lines system
• Cooling fan 1 crtl
• Cooling fan 2 crtl
• Ecm tcm fuse 5 15a
• Engine control module (ecm) (left side of engine compt)
• Fuel level sensor
• Fuel lvl sens sply volt
• Fuel pump & sender assembly (top of fuel tank)
• Fuel pump rly ctrl
• Fuel tank pressure (ftp) sensor (on fuel pump & sender assembly)
• Heated oxygen sensor (ho2s) 2
• Hi spd ser data
• Hot at all times
• Ign
• Ign volt
• Instrument panel cluster (ipc)
• J100
• J316
• Logic
• Low ref
• Maf sig
• Malfunction ind lp crtl
• Malfunction indicator lamp
• Motor
• Nca
• Oxygen sens hi
• Oxygen sens htr crtl
• Oxygen sens lo
• Pnk
• Press sens sig
• Pressure ind low engine oil
• Pwr/train rly
• Rear fuse block (below left side of rear seat)
• Shift interlock system
• Starter rly coil
• Starting/charging system
• Tan
• Tan/pnk

3.9L VIN M, Engine Performance Wiring Diagram (2 of 3) for Buick Lucerne CX 2009

List of elements for 3.9L VIN M, Engine Performance Wiring Diagram (2 of 3) for Buick Lucerne CX 2009:

• (lower left front of engine compt) secondary air injection (air) pump
• 5v ref
• Air pump fuse 22 50a
• Air pump relay
• Air sol fuse 5 15a
• Air sol relay
• Ap rly crtl
• Brk lt crtl
• Ecm/ crnk fuse 1 15a
• Ecm/ pcm fuse 9 10a
• Emis dev fuse 7 15a
• Engine control module (ecm) (left side of engine compt)
• Engine oil pressure (eop) sensor (left rear of engine)
• Evaporative emission (evap) canister vent solenoid valve (below rear of vehicle, on evap canister)
• Exterior lights system
• F/pmp fuse 1 20a
• F10
• Fuel inj even fuse 3 15a
• Fuel inj odd fuse 2 15a
• Fuel pump relay
• G112 (lower left rear of engine)
• G114 (lower left rear of engine)
• G301 (under left rear seat)
• Hot at all times
• Hot w/ ignition relay energized
• Iat sens sig
• Ign volt
• J105
• J108
• Manifold absolute pressure (map) sensor (top center of engine)
• Mass air flow (maf)/intake air temperature (iat) sensor (left side of engine compt, in air intake tube)
• Oxy snsr fuse 6 15a
• Pnk
• Pwr/trn relay 29
• Rear fuse block (below left rear seat)
• Safty sw sig
• Secondary air injection (air) pump check valve (top center of right camshaft cover)
• Sol can fuse 34 10a
• Starting/ charging system
• Tan
• Underhood fuse block (on right front of engine compt, forward of strut tower)
• Vent sol crtl

3.9L VIN M, Engine Performance Wiring Diagram (3 of 3) for Buick Lucerne CX 2009

List of elements for 3.9L VIN M, Engine Performance Wiring Diagram (3 of 3) for Buick Lucerne CX 2009:

• (1, 3 & 5 : top right side of engine) (2, 4 & 6 : top left side of engine) fuel injectors
• (center front of engine) camshaft position (cmp) sensor
• (lower left rear of engine) g115
• (right front of engine) camshaft position (cmp) actuator solenoid valve
• 5v ref
• Air sol 5v ref
• Air sol crtl
• Air sol low ref
• Air sol press
• Canister purge sol
• Ckp sens sig
• Cmp pos sens sig
• Crankshaft position (ckp) sensor (lower right side of engine)
• Ctrl ic1
• Ctrl ic2
• Ctrl ic3
• Engine control module (ecm) (left side of engine compt)
• Engine coolant temperature (ect) sensor (rear of left cylinder bank)
• G112 (lower left rear of engine)
• Gen duty cycle
• Gen on sig
• Gnd
• Heated oxygen sensor (ho2s) 1
• Ho2s low sig
• Ic 1 ctrl
• Ic 2 ctrl
• Ic 3 ctrl
• Ignition control module (icm) (top of right cylinder bank)
• Inj 1 ctrl
• Inj 2 ctrl
• Inj 3 ctrl
• Inj 4 ctrl
• Inj 5 ctrl
• Inj 6 ctrl
• J105
• J109
• Knock sensor (ks) 1 (left side of engine, near starter)
• Knock sensor (ks) 2 (right side of engine, below exhaust manifold)
• Ks b1 low ref
• Ks b1 sig
• Ks b2 low ref
• Ks b2 sig
• Logic
• Low ref
• Map sens 5v ref
• Map sens low ref
• Map sens sig
• Nca
• O2 sens hi
• O2 sens htr crtl
• Phaser ctrl
• Ref low
• Sens sig
• Starting/charging system
• Tan
• Tan/pnk
• Throttle body (top rear of engine)
• Throttle ctrl (cl)
• Throttle ctrl (op)
• Tp sens
• Tp sens 1 sig
• Tp sens 2
• Volt ign

4.6L VIN 9

4.6L VIN 9, Engine Performance Wiring Diagram (1 of 5) for Buick Lucerne CX 2009

List of elements for 4.6L VIN 9, Engine Performance Wiring Diagram (1 of 5) for Buick Lucerne CX 2009:

• (left rear of engine compt) 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
• Acc wake up serial data
• Accelerator pedal position (app) sensor (top of accelerator pedal assembly)
• Accessory volt
• Accessory wake up
• Air conditioning system
• App sensor 1 sig
• App sensor 2 sig
• Battery pos volt
• Cooling fans system
• Ecm/ pcm fuse 10a
• Ecm/crnk fuse 1 15a
• Engine control module (ecm) (left side of engine compt)
• 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 fuel pump & sender assembly)
• G112 (lower left rear of engine)
• Gnd
• Hot at all times
• Ign
• Ign 1 volt run/crank
• Ign relay
• Ignition 1 voltage
• Instrument panel cluster (ipc)
• J104 (in engine harness, approximately 13 cm (5 in) from breakout for x138)
• J105
• J203
• Logic
• Low reference
• Malfunction indicator lamp (mil)
• Mil control
• Oss hi sig
• Oss low sig
• Oxy snsr fuse 6 15a
• Pnk
• Pressure sns sig
• Primary fuel level
• Pwr/train relay
• Pwr/trn relay
• Rly ctrl
• Serial data acc wake up
• Starter rly coil
• Starting/ charging system
• Stop lamp sw sig
• Tan
• To fuse pwr emis dev fuse 7 (diagram 4 of 5)
• Underhood fuse block (on right front of engine compt, forward of strut tower)
• Vehicle speed sensor (vss) (in transmission)

4.6L VIN 9, Engine Performance Wiring Diagram (2 of 5) for Buick Lucerne CX 2009

List of elements for 4.6L VIN 9, Engine Performance Wiring Diagram (2 of 5) for Buick Lucerne CX 2009:

• (below rear of vehicle, on evap canister) evaporative emission (evap) canister vent solenoid valve
• (near a/c compressor, on hose assembly) a/c refrigerant pressure sensor
• (top of fuel tank) fuel pump & sender assembly
• (under left rear seat)
• 5v ref
• 5v ref 1
• Acc
• Air pump relay ctrl
• Cooling fans system
• Ctrl bank 2 sns 1
• Ecm/tcm fuse 5 15a
• Engine control module (ecm) (left side of engine compt)
• Evap canister purge
• F/pmp fuse 1 20a
• F10
• Field duty cycle sig
• Fuel pump relay
• G301
• G403 (right front wall of luggage compartment)
• Hot at all times
• Ignition switch
• J100
• J201
• J316 (in body harness, approximately 5 cm (2 in) from breakout for electronic suspension control module)
• 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
• Serial data bus -
• Shift interlock system
• Sol can fuse 10a
• Start
• Starting/ charging system
• Tan
• Transmissions system
• Turn on signal
• Volt bank 2 sns 1

4.6L VIN 9, Engine Performance Wiring Diagram (3 of 5) for Buick Lucerne CX 2009

List of elements for 4.6L VIN 9, Engine Performance Wiring Diagram (3 of 5) for Buick Lucerne CX 2009:

• (lower left front of engine compt) secondary air injection (air) pump
• (lower left rear of engine)
• (top center of right camshaft cover) secondary air injection (air) check valve
• (top rear of engine) evaporative emission (evap) canister purge solenoid valve
• Air injection pos
• Air pump fuse 22 50a
• Air pump relay
• Air sol fuse 5 15a
• Air sol relay
• Computer data lines system
• Ect sensor sig
• Engine control module (ecm) (left side of engine compt)
• Engine coolant temperature (ect) sensor (right rear of engine)
• G115
• Heated oxygen sensor (ho2s) bank 2 sensor 1 (on left exhaust manifold)
• Hot at all times
• Hot w/ pwr/train relay energized
• Ignition coil/module 2 (top left side of engine)
• J106
• Manifold absolute pressure (map) sensor (on top rear of engine)
• Map sensor sig
• Nca
• Oil press sw sig
• Pnk
• Refrig pre sen sig
• Serial data bus +
• Spark plug
• Tan
• Underhood fuse block (on right front of engine compt, forward of strut tower)

4.6L VIN 9, Engine Performance Wiring Diagram (4 of 5) for Buick Lucerne CX 2009

List of elements for 4.6L VIN 9, Engine Performance Wiring Diagram (4 of 5) for Buick Lucerne CX 2009:

• (below exhaust gas recirculation (egr) valve)
• (in even bank ignition coil harness, between x139 & ignition coil/module 8)
• (on top right rear of engine) exhaust gas recirculation (egr) valve
• Emis dev fuse 7 15a
• From ecm/crnk fuse 1 (diagram 1 of 5)
• Fuel inj even fuse 3 15a
• Fuel inj odd fuse 2 15a x3
• Fuel injectors (top left side of engine)
• Fuel injectors (top right side of engine)
• G100
• Ignition coil/module (top left side of engine)
• Ignition coil/module (top right side of engine)
• J102
• J109
• J110
• J131
• J133
• J135
• J142
• J144
• J146 (in odd bank ignition coil harness, between x140 & ignition coil/module 7)
• Nca
• Pnk
• Pnk/tan
• Red
• Spark plug
• Underhood fuse block (on right front of engine compt, forward of strut tower)

4.6L VIN 9, Engine Performance Wiring Diagram (5 of 5) for Buick Lucerne CX 2009

List of elements for 4.6L VIN 9, Engine Performance Wiring Diagram (5 of 5) for Buick Lucerne CX 2009:

• 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)
• Ground
• Heated oxygen sensor (ho2s) 2
• 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
• J105
• 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 (left side of engine compartment, in air intake tube)
• Nca
• Pnk
• Pnk/red
• Pnk/tan
• Ref bank 1 sen 1
• Tac motor ctrl 1
• Tac motor ctrl 2
• Tan
• Tan/pnk
• Throttle body (top rear of engine)
• 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 CX 2009

List of elements for Exterior Lamps Wiring Diagram (1 of 2) for Buick Lucerne CX 2009:

• 3.9l
• 4.6l
• 5v ref
• Auto
• Backup lamp circuit
• Batt pos volt
• Body control module (bcm) (right of glove box)
• Brake pedal position sensor (top of brake pedal assembly)
• Center high mounted stop lamp (chmsl)
• Chmsl sply volt
• Computer data lines system
• Driver outside rear view mirror (in driver's door)
• Engine control module (ecm) (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
• J202
• J204
• J206
• Left backup lamp
• Left tail lamp
• Left turn
• Left turn sw sig
• Lf crn lamp fuse 20 10a
• Lf turn
• Lf turn sig lmp sply
• Lh corn lmp rly ctrl
• Logic
• Low ref
• Lr stop/turn lmp sply
• Off
• Park
• Prk lmp rly ctrl
• Prk lmp sw on sig
• Rf crn lamp fuse 21 10a
• Rf turn
• Rf turn sig lmp sply
• Rh corn lmp rly ctrl
• Right backup lamp
• Right tail lamp
• Right turn
• Right turn sw sig
• Rr stop/turn lmp sply
• Sens sig
• Serial data
• Sig lmp x1 sply volt
• Stop lmp sw sig
• Tan
• Tan/pnk
• Transmission control module (tcm) (4.6l: left rear of engine compt)
• Trn/sig pcb relay
• Turn signal/ multi-function switch
• Underhood fuse block (on right front of engine compt, forward of strut tower)
• Underhood fuse block (on right front of engine compt, forward of strut tower) x3

Exterior Lamps Wiring Diagram (2 of 2) for Buick Lucerne CX 2009

List of elements for Exterior Lamps Wiring Diagram (2 of 2) for Buick Lucerne CX 2009:

• (in body harness, approximately 12 cm (5 in) from breakout for battery current sensor) j326
• (left rear of luggage compt) g402
• (right front wall of luggage compt) g403
• B11
• Bcm (chmsl) fuse 39 10a
• Bcm (ctsy) fuse 35 10a
• Bcm (lttn) fuse 25 15a
• Bcm (rttn) fuse 36 15a
• Computer data lines system
• E12
• G104 (right front corner of engine compt)
• G300 (under driver's seat)
• G403 (right front wall of luggage compt)
• Gmlan (bcm)
• Hot at all times
• Instrument cluster (ipc)
• J203
• J323 (in body harness, approximately 15 cm (6 in) from branch for rear fuse block)
• J324 (in body harness, approximately 5 cm (2 in) from breakout for right inflatable restraint roof rail module)
• J402
• J404 (in rear fascia harness, approximately 13 cm (5 in) from breakout for license lamps)
• Left front cornering lamp
• Left front headlamp assembly
• Left front marker lamp
• Left license lamp
• Left park/ turn signal lamp
• Left rear marker lamp
• Left tail lamp assembly
• Left tail/stop & turn signal lamp
• Left turn ind
• Logic
• Park lp-lt fuse 2 10a
• Park lp-lt fuse 4 10a
• Park lp-lt relay 58
• Rear fuse block (below left side of rear seat)
• Right front cornering lamp
• Right front headlamp assembly
• Right front marker lamp
• Right license lamp
• Right park/ turn signal lamp
• Right rear marker lamp
• Right tail lamp assembly
• Right tail/stop & turn signal lamp
• Right turn ind
• Serial data
• Tan
• Tan/pnk
• Trailer stop/turn
• Underhood fuse block (on right front of engine compt, forward of strut tower)

3.9L VIN 1

3.9L VIN 1, Backup Lamps Wiring Diagram for Buick Lucerne CX 2009

List of elements for 3.9L VIN 1, Backup Lamps Wiring Diagram for Buick Lucerne CX 2009:

• Automatic transmission
• Automatic transmission internal mode switch
• Backup
• Backup lmp sply
• Batt pos volt
• Bcm (chmsl) fuse 39 10a
• Body control module (bcm) (right of glove box)
• Bus +
• Bus -
• Code a
• Code b
• Computer data lines system
• Exterior lamps circuit
• G112 (lower left rear of engine)
• G403 (right front wall of luggage compt)
• Hot at all times
• Inside rearview mirror
• J325 (in body harness, approximately 7 cm (3 in) from breakout for battery current sensor)
• Left backup lamp
• Left tail lamp
• Lmp sply volt
• Logic
• Rear fuse block (below left side of rear seat)
• Right backup lamp
• Right tail lamp
• Serial data bus +
• Serial data bus -
• Sig a
• Sig b
• Tan
• Transmission control module (tcm)
• X2 e12

3.9L VIN M

3.9L VIN M, Backup Lamps Wiring Diagram for Buick Lucerne CX 2009

List of elements for 3.9L VIN M, Backup Lamps Wiring Diagram for Buick Lucerne CX 2009:

• Automatic transmission
• Automatic transmission internal mode switch
• Backup
• Backup lmp sply
• Batt pos volt
• Bcm (chmsl) fuse 39 10a
• Body control module (bcm) (right of glove box)
• Bus +
• Bus -
• Code a
• Code b
• Computer data lines system
• Exterior lamps circuit
• G112 (lower left rear of engine)
• G403 (right front wall of luggage compt)
• Hot at all times
• Inside rearview mirror
• J325 (in body harness, approximately 7 cm (3 in) from breakout for battery current sensor)
• Left backup lamp
• Left tail lamp
• Lmp sply volt
• Logic
• Rear fuse block (below left side of rear seat)
• Right backup lamp
• Right tail lamp
• Serial data bus +
• Serial data bus -
• Sig a
• Sig b
• Tan
• Transmission control module (tcm)
• X2 e12

4.6L VIN 9

4.6L VIN 9, Backup Lamps Wiring Diagram for Buick Lucerne CX 2009

List of elements for 4.6L VIN 9, Backup Lamps Wiring Diagram for Buick Lucerne CX 2009:

• (in body harness, approximately 7 cm (3 in) from breakout for battery current sensor) j325
• (lower left rear of engine) g112
• Automatic transmission
• Backup
• Backup lmp sply
• Batt pos volt
• Bcm (chmsl) fuse 39 10a
• Body control module (bcm) (right of glove box)
• Bus +
• Bus -
• Computer data lines system
• E12 x2
• Exterior lamps circuit
• G403 (right front wall of luggage compt)
• Hot at all times
• Inside rear view mirror
• J105
• Left backup lamp
• Left tail lamp
• Lmp sply volt
• Logic
• Nca
• Rear fuse block (below left side of rear seat)
• Right backup lamp
• Right tail lamp
• Serial data bus +
• Serial data bus -
• 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 CX 2009

List of elements for Ground Distribution Wiring Diagram (1 of 4) for Buick Lucerne CX 2009:

• (3.9l) ignition control module (icm)
• (4.6l) a/c compressor clutch
• (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
• (w/ side obstacle detection sensor indicator) left side object sensor
• (w/ side obstacle detection sensor indicator) right side object sensor
• 3.9l & pzev
• A x2
• Air pump relay
• Automatic level control (alc) compressor
• Battery
• Body control module (bcm)
• Electronic brake control module (ebcm)
• Fuel pump & sender assembly
• G100 (4.6l) (below exhaust gas recirculation (egr) valve)
• G101 (left front corner of engine compartment)
• G114 (lower left rear of engine)
• G115 (lower left rear of engine)
• G303 (below right side of rear seat)
• G403 (right front wall of luggage compartment)
• G406 (at left "c" pillar)
• G407 (at right "c" pillar)
• Ignition coil 1
• Ignition coil 2
• Ignition coil 3
• Ignition coil 4
• Ignition coil 5
• Ignition coil 6
• Ignition coil 7
• Ignition coil 8
• J106 (in engine harness, approximately 7 cm (3 in) from branch for throttle body assembly)
• J108 (in engine harness, approximately 10 cm (4 in) from breakout for automatic transmission)
• J133 (in even bank ignition coil harness, between x139 & ignition coil/module 2)
• J144
• J385 (in body harness, approximately 10 cm (4 in) from g306)
• J402 (in rear fascia harness, approximately 7 cm (3 in) from breakout for license lamps)
• Keyless entry antenna
• Left license lamp
• Left tail lamp
• Nca
• Rear window defogger
• Right license lamp
• Right tail lamp
• Right tail/ stop & turn signal lamp
• Secondary air injection (air) pump
• Solenoid
• Windshield wiper motor
• Wpr hi pcb relay
• X1 b
• X2 e2
• X900
• X901

Ground Distribution Wiring Diagram (2 of 4) for Buick Lucerne CX 2009

List of elements for Ground Distribution Wiring Diagram (2 of 4) for Buick Lucerne CX 2009:

• (on right front of engine compartment, forward of strut tower) underhood fuse block
• (w/ heated nozzle) windshield washer solvent heater
• (w/ remote keyless entry start/ extended range) hood ajar switch
• 12 cm (5 in) from breakout for x800)
• 14 cm (6 in) from branch for throttle body assembly)
• Approximately 6 cm (2 in) from breakout for a/t shift lock control solenoid)
• Automatic transmission
• Automatic transmission shifter lever
• Blower motor control module
• Body control module (bcm)
• C x1
• Center console accessory power outlet
• Cigar lighter
• D x2
• Engine control module (ecm)
• Engine oil pressure (eop) switch
• Fan 3 relay 32
• For i/p compartment lamp)
• Front passenger door module (fpdm)
• G104 (right front corner of engine compartment)
• G112 (4.6l) (lower left rear of engine)
• G302 (under right front passenger's seat)
• G304 (under right front passenger's seat)
• Headlamp switch
• Horn assembly
• I/p compartment lamp
• Ign relay
• Inflatable restraint sensing & diagnostic module (sdm)
• J383 (in center console harness, between breakout for a/t shift lock control solenoid & breakout for auxiliary hvac control module)
• J387
• K x175
• Left front fog lamp
• Left headlamp
• Mass air flow (maf)/ intake air temperature (iat) sensor
• Nca
• Right engine cooling fan
• Right front door courtesy lamp
• Right front fog lamp
• Right headlamp
• Right rear door latch
• Right rear window switch
• Strtr relay 30
• To passenger seat adjuster switch (diagram 3 of 4)
• Traction control switch
• Transmission control module (tcm)
• W/ custom bucket seat
• Windshield washer fluid level switch
• Windshield washer fluid pump
• Wpr pcb relay
• X113
• X114
• X3 c6

Ground Distribution Wiring Diagram (3 of 4) for Buick Lucerne CX 2009

List of elements for Ground Distribution Wiring Diagram (3 of 4) for Buick Lucerne CX 2009:

• (w/ custom bucket seat & non bucket individual front seat) ignition lock cylinder control solenoid
• (w/ front cooling seat heater) seat climate control module
• (w/ memory seat adjuster) memory seat module (msm)
• (w/ non bucket individual front seat) traction control switch
• Ambient light sensor
• Approximately 8 cm (4 in) from breakout for inflatable restraint seat position sensor)
• Ashtray lamp
• Brake fluid level switch
• Cigar lighter
• Data link connector (dlc)
• Driver door module (ddm)
• Driver information display switch
• Driver seat adjuster switch
• From splice j387 (diagram 2 of 4)
• Front accessory power outlet
• 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 (ipc)
• J203 (in i/p harness, approximately 36 cm (14 in) from breakout for hvac module)
• J306 (in right front seat harness, approximately 7 cm (3 in) from breakout for passenger seat belt switch)
• Left front door courtesy lamp
• Left steering wheel control switch
• Lighter)
• Nca
• Passenger seat adjuster switch
• Passenger seat lumbar adjuster switch
• Restraint steering wheel module coil)
• Right steering wheel control switch
• Sunload sensor
• Theft deterrent module (tdm)
• Turn signal/ multi-function switch
• W/ 8-way passenger seat adjuster
• W/ automatic, auxiliary temperature air conditioner
• W/ electronic controls front air conditioner
• W/ heated nozzles
• W/ non bucket individual front seat
• W/o 8-way passenger seat adjuster
• X205 & turn signal/multi-function switch connector c4)
• X276
• X276 d
• X277
• X277 d

Ground Distribution Wiring Diagram (4 of 4) for Buick Lucerne CX 2009

List of elements for Ground Distribution Wiring Diagram (4 of 4) for Buick Lucerne CX 2009:

• (below left side of rear seat) rear fuse block
• (if equipped) windshield outside moisture sensor
• (w/ digital audio system s-band) digital radio receiver
• (w/ lane departure warning) vehicle direction alert alarm warning module
• (w/ onstar) vehicle communication interface module (vcim)
• (w/ rear parking assist) rear object sensor control module
• (w/ suspension system) automatic level control (alc) module
• Audio amplifier
• Center high mounted stop lamp (chmsl)
• Fuel pump relay 59
• G110 (left front of engine)
• G111 (right front of engine)
• G301 (under left rear seat)
• G305 (under driver's seat)
• G402 (left rear of luggage compartment)
• Garage door opener (gdo)
• Inflatable restraint i/p module indicator
• Inside rearview mirror (isrvm)
• J312 (in headliner harness, approximately 10 cm (4 in) from branch for x321)
• J313
• J365 (in body harness, approximately 5 cm (2 in) from audio amplifier connector c1)
• Left rear door latch
• Left rear window switch
• Left sunshade
• Left tail/stop & turn signal lamp
• Lock relay 63
• Radio
• Rap-hc relay 70
• Rear compartment lid latch
• Remote control door lock receiver (rcdlr)
• Right sunshade
• Rr defog relay 52
• Run relay 64
• Sunroof switch
• Trk rel relay 67
• Unlock relay 62
• W/ premium audio branded & amplifier

HEADLIGHTS

Headlights Wiring Diagram for Buick Lucerne CX 2009

List of elements for Headlights Wiring Diagram for Buick Lucerne CX 2009:

• (on top of park brake assembly) park brake switch
• Body control module (bcm) (right of glove box)
• C (not used)
• C12
• Computer data lines system
• Data
• Drl fuse 16 15a
• Drl relay 65
• Drl rly ctrl
• Exterior lights system
• F10
• Flash to pass sw sig
• Fog lamp pcb relay
• Fog lamp rly ctrl
• Fog lamps ind
• Fog lp fuse 14 10a
• Front fog lamp switch
• 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)
• Gmlan serial data
• Head
• Headlamp sw off sig
• Headlamp sw on sig
• Headlamp switch
• 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)
• J124 (in forward lamp harness, approximately 26 cm (11 in) from x114)
• J203
• J204
• J206
• Left front fog lamp
• Left headlamp
• Left high beam headlamp
• Left low beam headlamp
• Light sensor sig
• Lo beam pcb relay
• Logic
• Low
• Low beam rly ctrl
• Lt hi beam fuse 16 10a
• Lt lo beam fuse 17 20a
• Off
• Park auto
• Park brk sw sig
• Park lamp relay ctrl
• Park lamp sw on sig
• Pnk
• Rear fuse block (below left side of rear seat)
• Right front fog lamp
• Right headlamp
• Right high beam headlamp
• Right low beam headlamp
• Rt hi beam fuse 15 10a
• Rt lo beam fuse 18 20a
• Serial
• Serial data
• Sunload twilight sensor (w/ automatic a/c) (top center of dash) ambient light sensor (w/ manual a/c) (center of dash, in defroster deflector)
• Turn signal/ multi-function switch
• Underhood fuse block (on right front of engine compartment, forward of strut tower)
• W/ automatic a/c
• W/ manual a/c
• Washer sw sig
• Wiper/washer system

HORN

Horn Wiring Diagram for Buick Lucerne CX 2009

List of elements for Horn Wiring Diagram for Buick Lucerne CX 2009:

• (in right front seat harness, approximately 7 cm (3 in) from breakout for passenger seat adjuster switch toward x314) j322
• (right front corner of engine compartment) g104
• (under driver's seat) g300
• Body control module (bcm) (right of glove box)
• High note horn
• Horn assembly (left front of engine compartment)
• Horn fuse 12 15a
• Horn pcb relay
• Horn rly ctrl
• Horn switch
• Hot at all times
• Inflatable restraint steering wheel module coil (top of steering column)
• J219
• Low note horn
• Nca
• Tan
• Underhood fuse block (on right front of engine compartment, forward of strut tower)
• X276
• X277

INSTRUMENT CLUSTER

Instrument Cluster Wiring Diagram (1 of 2) for Buick Lucerne CX 2009

List of elements for Instrument Cluster Wiring Diagram (1 of 2) for Buick Lucerne CX 2009:

• Abs ind
• Air bag ind
• Audible alarm
• Automatic a/c
• Backlighting ctrl
• Batt pos volt
• Brake ind
• Charging ind
• Computer data lines system
• Cruise ind
• Driver information center (dic)
• Drv info center select menu sw sig
• Drv info center sw low ref
• Drv info center sw sig
• Engine controls system
• Engine coolant gauge
• Engine coolant temperature ind
• F5 x2
• Fog lamps ind
• Fuel level gauge
• G300 (under driver's seat)
• Gmlan
• Gmlan (bcm)
• Gmlan (ebcm)
• Gmlan (ecm)
• Gmlan (sdm)
• Gnd
• Ground
• Heated washer fluid ind ctrl
• High beam ind
• Hot at all times
• Hot w/ ign relay 36 energized
• Hvac/ ipc ign1 fuse 10 10a
• Ign
• Ign 1 volt
• Illumination
• Instrument panel cluster (ipc)
• Interior lights system
• Ipc
• J200
• J202
• J203
• J229
• Left turn ind
• Logic
• Low oil ind
• Low spd gmlan serial data
• Low tire pressure ind
• Low washer fluid ind ctrl
• Malfunction ind
• Manual a/c
• Off ind ctrl
• Pass air bag
• Pass air bag on ind ctrl
• Pass seat belt ind
• Passkey fuse 13 10a
• Pnk
• Pnk/tan
• Power distribution system
• Rear fuse block (below left side of rear seat)
• Right turn ind
• Seat belt ind
• Security ind
• Speedometer (mph/km/h)
• Tachometer
• Tan
• Trip reset sw sig
• Trip/ odometer
• Trip/odometer ctrl
• Trip/reset
• Underhood fuse block (on right front of engine compt, forward of strut tower)
• Vdc ind
• Wiper/washer system
• X2 b2

Instrument Cluster Wiring Diagram (2 of 2) for Buick Lucerne CX 2009

List of elements for Instrument Cluster Wiring Diagram (2 of 2) for Buick Lucerne CX 2009:

• (rear of driver's door) driver door latch assembly
• (rear of front passenger's door) front passenger door latch assembly
• 3.9l
• 4.6l
• Body control module (bcm) (right of glove box)
• Brake fluid level switch (on master cylinder reservoir)
• Computer data lines system
• Driver door module (ddm)
• Driver information display switch
• Engine control module (ecm) (left side of engine compt)
• Engine controls system
• Engine oil pressure (eop) switch (4.6l) (near oil filter)
• Front passenger door module (fpdm)
• Fuel level sens sig
• Fuel pump & sender assembly (top of fuel tank)
• G112 (lower left rear of engine)
• G300 (under driver's seat)
• G301 (under left rear seat)
• G304 (under right front passenger's seat)
• Gmlan serial data+
• Gmlan serial data-
• Interior lights system
• J105
• J202
• J316 (in body harness, approximately 5 cm (2 in) from breakout for electronic suspension control module)
• J700
• J800
• Left rear door latch assembly (rear of left rear door)
• Logic
• Low ref
• Low spd gmlan serial data
• Lr dr ajar sw sig
• Oil press sw sig
• Park brake sw sig
• Park brake switch (on top of park brake assembly)
• Persona- lization
• Pnk
• Rf dr ajar
• Right rear door latch assembly (rear of right rear door)
• Rr dr ajar sw sig
• Set/ reset
• Sw sig lf dr sw low ref
• Tan
• Trip/ fuel
• Vehicle information
• W/ theft deterrent system
• W/o theft deterrent system

INTERIOR LIGHTS

Courtesy Lamps Wiring Diagram for Buick Lucerne CX 2009

List of elements for Courtesy Lamps Wiring Diagram for Buick Lucerne CX 2009:

• (in body harness, approximately 14 cm (6 in) from breakout for x325) j329
• (in body harness, approximately 5 cm (2 in) from breakout for audio amplifier connector c1) j372
• (left rear of luggage compt)
• (under right front passenger's seat)
• 12 volt ref
• Batt pos volt
• Bcm (ctsy) fuse 35 10a
• Bcm (inadv) fuse 32 10a
• Body control module (bcm) (right of glove box)
• Computer data lines system
• Court lamp ctrl
• Courtesy lamp
• 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
• Hot at all times
• I/p compartment lamp
• J202
• J206
• J211 (in i/p harness, approximately 28 cm (11 in) from breakout for body control module connector)
• J313
• J328 (in headliner harness, approximately 20 cm (8 in) from branch for x321)
• J331 (in ip harness, between body control module & front door courtesy lamps)
• J343 (in body harness, approximately 9 cm (3 in) from branch for x314)
• J700
• J800
• Left front door courtesy lamp
• Left rear door latch assembly (rear of left rear door)
• Left roof rail reading lamp
• Left sunshade
• Low ref
• Low spd gmlan serial data
• Low speed gmlan serial data
• Lr door open sw sig
• Off
• Open sw sig
• Rear compartment courtesy lamp
• Rear compartment lid latch (center rear of luggage compt)
• Rear fuse block (below left side of rear seat)
• Right front door courtesy lamp
• Right rear door latch assembly (rear of right rear door)
• Right roof rail reading lamp
• Right sunshade
• Tan/ pnk
• Tan/pnk
• W/ theft deterrent system
• W/o theft deterrent system
• X2 b11

Instrument Illumination Wiring Diagram for Buick Lucerne CX 2009

List of elements for Instrument Illumination Wiring Diagram for Buick Lucerne CX 2009:

• (in i/p harness, approximately 21 cm (8 in) from branch for hazard lamp switch toward branch for hvac module) j212
• (under
• 12 volt ref
• Ashtray lamp
• Auto park
• Automatic air conditioning
• Backlight lamp ctrl
• Backlighting (8 bulbs)
• Backlighting control
• Batt pos volt
• Bcm (dim) fuse 18 10a
• Body control module (bcm) (right of glove box)
• Court lamp sw on sig
• D x2
• Driver information display switch
• Driver's seat)
• E12
• 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
• Head
• Headlamp switch
• Hot at all times
• Hvac control module
• I/p dimming sig
• Inflatable restraint steering wheel module coil (in steering wheel)
• Inst panel lamp sply
• Instrument panel cluster (ipc)
• J202
• J203
• J206
• J214 (in i/p harness, approximately 17 cm (6 in) from breakout for body control module connector)
• J219
• J221
• J225 (inside of heated steering wheel)
• J312
• J313
• J333 (in body harness, approximately 35 cm (14 in) from breakout for left inflatable restraint side impact sensor)
• J383
• J700
• J800
• Led dimming sig
• Left rear window switch
• Left steering wheel control switch
• Lighter) x2
• Logic
• Manual air conditioning
• Off
• Park lamp sw on sig
• Pnk
• Radio
• Rear fuse block (below left side of rear seat)
• Reverse lockout solenoid (base of floor shifter assembly)
• Right rear window switch
• Right steering wheel control switch
• Stg illum fuse 8 2a
• Sunroof switch (if equipped)
• Traction control switch
• W/ custom seat
• W/ individual seat
• X276
• X277

MEMORY SYSTEMS

Memory Systems Wiring Diagram (1 of 3) for Buick Lucerne CX 2009

List of elements for Memory Systems Wiring Diagram (1 of 3) for Buick Lucerne CX 2009:

• (in left front seat harness, approximately 14 cm (6 in) from breakout for driver seat adjuster motor) j351
• (under driver's seat) g300
• A x1
• A11
• B x1
• Battery pos volt
• D5 x1
• 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
• Dw steering tilt mtr ctrl
• For telescope mtr ctrl
• Forward ctrl
• Front ver mtr dn ctrl
• Front ver mtr up ctrl
• Ground
• Horizontal motor
• Horizontal sensor
• Hot at all times
• J305
• J352 (in left front seat harness, approximately 7 cm (3 in) from breakout for inflatable restraint seat position sensor)
• Lh back element ctrl
• Lh back sens low ref
• Lh cushion element ctrl
• Lh temp sens low ref
• Low ref
• Lumbar forward ctrl
• Lumbar rearward ctrl
• Mdl-mem fuse 6 10a
• Memory seat module (on underside of driver's seat, on seat adjuster frame)
• Memory seat sw high sig
• Pnk
• Pnk a
• Pwr seat circuit breaker 55 25a
• Pwr t/t circuit breaker 57 25a
• 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
• Rev telescope mtr ctrl
• Rh back sens low ref
• Rh cushion element ctrl
• Rh element ctrl
• Rh temp sens low ref
• Seats system
• Tan
• Tan/ red
• Tan/red
• Up ctrl
• Up steering tilt mtr ctrl
• Vertical motor
• Vertical sensor
• X2 d
• X3 e8

Memory Systems Wiring Diagram (2 of 3) for Buick Lucerne CX 2009

List of elements for Memory Systems Wiring Diagram (2 of 3) for Buick Lucerne CX 2009:

• C x2
• 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
• J215
• J216
• Pnk
• Tan
• Tan/red
• Telescoping actuator (if equipped) (on steering column assembly)
• Tilt actuator (if equipped) (on steering column)
• X1 a

Memory Systems Wiring Diagram (3 of 3) for Buick Lucerne CX 2009

List of elements for Memory Systems Wiring Diagram (3 of 3) for Buick Lucerne CX 2009:

• 5v ref
• Computer data lines system
• Down
• Driver cushion temp sens sig
• Driver lumbar adjuster switch
• Driver seat adjuster switch
• Driver seat back temp 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
• J349 (in left front seat harness, approximately 8 cm (4 in) from breakout for auxiliary power outlet connector)
• Left
• Lumbar horizontal pos sens sig
• Lumbar vertical pos sens sig
• Memory seat module (on underside of driver's seat, on seat adjuster frame)
• Nca
• Pnk
• 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 temp sens sig
• Rh seat cushion temp sens sig
• Rh seat mode signal
• Right
• Seats system
• Steering column tilt sens sig
• Tan
• Telescope forward sw sig
• Telescope rev sw sig
• Telescope sens sig
• Tilt down sw sig
• Tilt up sw sig
• Tilt/telescope switch (on steering column)

NAVIGATION

Navigation Wiring Diagram for Buick Lucerne CX 2009

List of elements for Navigation Wiring Diagram for Buick Lucerne CX 2009:

• (or 7043)
• (or 7044)
• (or bare)
• Antenna
• Bare
• Battery
• Cell mic sig
• Cellular microphone (in overhead console)
• Cellular telephone antenna
• Coax
• Computer data lines system
• Drain
• Drain wire
• Drain wire voice rec low ref
• G305 (under driver's seat)
• Gmlan serial data
• Gps antenna
• Ground
• Hot at all times
• Low ref
• Navigation antenna
• Power distribution system
• Radio
• Radio fuse 44 15a
• Rear fuse block (below left side of rear seat)
• Rec aud sig
• Rec low ref
• Vehicle communication interface module (vcim) (if equipped) (on right front of trunk, attached to seat back brace)
• W/ onstar
• W/o onstar

Parking Assistant Wiring Diagram for Buick Lucerne CX 2009

List of elements for Parking Assistant Wiring Diagram for Buick Lucerne CX 2009:

• Batt pos volt
• Center amber ind
• Center amber ind ctrl
• Computer data lines system
• Driver door module (ddm)
• Driver outside rearview mirror
• Front passenger door module (fpdm)
• G301 (under left rear seat)
• G403 (right front wall of luggage compt)
• Gnd
• Ground
• Hot at all times
• Ign 1 volt
• J400 (in rear fascia harness, approximately 7 cm (3 in) from breakout for right middle object alarm sensor)
• J401 (in rear fascia harness, approximately 7 cm (3 in) from breakout for right middle object alarm sensor)
• J402
• J405
• Led ctrl
• Led sig
• 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)
• Left side object sensor
• Low ref
• Low serial data
• Low speed gmlan serial data
• Lr corner object sensor sig
• Lr middle object sensor sig
• Mdl-rpa fuse 12 10a
• Object alarm module (on right rear wheelwell)
• Object sensor sply volt
• Passenger outside rearview mirror
• Pnk
• Rear fuse block (below left side of rear seat)
• Rear parking assist (rpa) display
• 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)
• Right side object sensor
• Rr corner object sensor sig
• Rr middle object sensor sig
• Serial data
• Telltale assembly sply volt

POWER DISTRIBUTION

Power Distribution Wiring Diagram (1 of 5) for Buick Lucerne CX 2009

List of elements for Power Distribution Wiring Diagram (1 of 5) for Buick Lucerne CX 2009:

• (in engine harness, approximately 41 cm (16 in) from underhood fuse block connector c3) j111
• (in ip harness, between x201 & x202) j229
• (on right front of engine compt, forward of strut tower) underhood fuse block
• 3.9l
• 4.6l
• A/c clutch relay 34
• Abs fuse 23 50a
• Abs mtr fuse 25 60a
• Air bag fuse 11 10a
• Air pump relay 37
• Air/sol relay 35
• Automatic a/c
• Automatic transmission
• Battery
• Body control module (bcm)
• Ecm/ pcm fuse 9 10a
• Electronic brake control module (ebcm)
• Engine control module (ecm)
• Fan 1 fuse 30a
• Fan 1 relay 33
• Fan 2 fuse 30a
• Fan 2 relay 31
• Fog lamp pcb relay
• From b trn/sig pcb relay (diagram 1 of 5)
• Fusible link
• G112 (lower left rear of engine)
• Generator
• High/beam pcb relay
• Horn pcb relay
• Hvac control module
• Hvac/ipc ign 1 fuse 10 10a
• Ign relay 36
• Inflatable restraint i/p module indicator
• Inflatable restraint sensing & diagnostic module (sdm)
• Instrument panel cluster (ipc)
• J105
• Lo/beam pcb relay
• Manual a/c
• Pnk
• Pnk/red
• Pwr/train relay 29
• Recirculation actuator
• Red
• Starter motor
• Strtr relay 30
• To ecm/ crnk fuse 1 (diagram 5 of 5)
• To rear fuse block (diagram 2 of 5)
• To wpr fuse 13 (diagram 1 of 5)
• Trans ign 1 fuse 8 10a
• Transmission control module (tcm)
• Trn/sig pcb relay
• W/ heated nozzle
• Windshield washer solvent heater
• Wpr fuse 25a
• Wpr hi pcb relay
• Wpr pcb relay
• Wsh pcb relay
• Wsw htr fuse 28 60a
• X175

Power Distribution Wiring Diagram (2 of 5) for Buick Lucerne CX 2009

List of elements for Power Distribution Wiring Diagram (2 of 5) for Buick Lucerne CX 2009:

• (below left side of rear seat) rear fuse block
• (in body harness, approximately 10 cm (4 in) from audio amplifier connector c1) j366
• A12
• Amp-rdo fuse 38 30a
• Audio amplifier
• B12
• Bcm fuse 40 10a
• Body control module (bcm)
• Data link connector (dlc)
• Ddm fuse 22 15a
• Digital radio receiver
• Driver door control module
• E11
• Ecm/tcm fuse 5 15a
• Engine control module (ecm)
• Evaporative emission (evap) canister vent solenoid valve
• F10
• From battery (diagram 1 of 5)
• From c amp-rdo fuse 38 (diagram 2 of 5)
• Garage door opener transmitter
• Hvac control module
• If equipped
• Inflatable restraint passenger presence system (pps) module
• Inflatable restraint sensing & diagnostic module (sdm)
• Instrument panel cluster (ipc)
• J392 (in headliner harness, approximately 11 cm (5 in) from breakout to rear park assist indicator)
• Mdl-frt fuse 9 30a
• Mdl-onstar fuse 42 10a
• Mdls-body fuse 43 10a
• Passenger door control module
• Passkey fuse 13 10a
• Pdm fuse 29 15a
• Pnk/ red
• Radio
• Radio fuse 44 15a
• Red
• Remote control door lock receiver (rcdlr)
• Sdm fuse 30 10a
• Seat climate control module
• Sol can fuse 34 10a
• Tan/ red
• Theft deterrent module (tdm)
• To ign-sw fuse 21 (diagram 3 of 5)
• To mdls-body fuse 43 (diagram 2 of 5)
• Transmission control module (tcm) (4.6l)
• Vehicle commu- nication interface module (vcim)
• Vehicle direction alert alarm warning module
• W/ lane departure warning sensor indicator
• W/ onstar
• W/o lane departure warning sensor indicator

Power Distribution Wiring Diagram (3 of 5) for Buick Lucerne CX 2009

List of elements for Power Distribution Wiring Diagram (3 of 5) for Buick Lucerne CX 2009:

• (below left side of rear seat) rear fuse block
• (in right front seat harness, approximately 114 cm (45 in) from passenger seat adjuster switch connector) j348
• A11
• Apos fuse 31 20a
• Automatic level control (alc) compressor
• Automatic level control module
• Bcm (chmsl) fuse 39 10a
• Bcm (dim) fuse 18 10a
• Bcm (inadv) fuse 32 10a
• Bcm (lttn) fuse 25 15a
• Bcm (rttn) fuse 36 15a
• Blower motor control module
• Body control module (bcm)
• Breakout to right rear corner object alarm sensor) j405
• C10
• Center console accessory power outlet
• Cigar lighter
• Comp relay fuse 24 10a
• Driver seat adjuster switch
• E12
• Electronic suspension control (esc) module
• From d pdm fuse 29 (diagram 2 of 5)
• From e mdl-rtd fuse 15 (diagram 3 of 5)
• Front accessory power outlet (w/ custom seat)
• G300 (under driver's seat)
• G304 (under right front passenger's seat)
• Ign-sw fuse 21 5a
• J221
• J307
• J388 (in body harness, approximately 27 cm (11 in) from branch for rear fuse block)
• Left side object sensor
• Level comp fuse 47 40a
• Level comp relay 53
• Ltr-cig fuse 26 20a
• Mdl-mem fuse 6 10a
• Mdl-rpa fuse 12 10a
• Mdl-rtd fuse 15 25a
• Memory seat module (if equipped)
• Mtr fuse 48 (automatic a/c) blower fuse 49 (manual a/c) 40a
• Passenger seat adjuster switch
• Passenger seat lumbar adjuster switch
• Pwr seat circuit breaker 55 25a
• Pwr t/t circuit breaker 57 25a
• Rear object sensor control module
• Red/ pnk
• Rf seat circuit breaker 54 25a
• Right side object sensor
• To ignition switch (diagram 5 of 5)
• To mdl-rpa fuse 12 (diagram 3 of 5)
• To rap-hc relay 70 (diagram 4 of 5)
• Trk rel relay 67
• W/ custom seat
• W/ individual seat
• W/ magneto rheological
• W/ memory seat
• W/ multi- directional
• W/ obstacle detection sensor indicator
• W/ power tilt telescoping steering column
• W/ rear parking assist
• W/o magneto rheological
• W/o memory seat
• W/o multi- directional

Power Distribution Wiring Diagram (4 of 5) for Buick Lucerne CX 2009

List of elements for Power Distribution Wiring Diagram (4 of 5) for Buick Lucerne CX 2009:

• (below left side of rear seat) rear fuse block
• (chmsl) fuse 39 (diagram 3 of 5)
• (in center console harness, approximately 8 cm (3 in) from breakout for a/t shift lock control solenoid) j381
• A11
• Automatic transmission shift lever
• B11
• Bcm (ctsy) fuse 35 10a
• Bcm fuse 19 10a
• Body control module (bcm)
• Circuit breaker 56 (diagram 4 of 5)
• Driver door module (ddm)
• Drl relay 65
• E11
• From bcm f
• From pwr wdo g
• Front passenger door module (fpdm)
• Fuel pump relay 59
• G301 (under left rear seat)
• Heated steering wheel control module
• Inflatable restraint steering wheel module coil
• Inside rearview mirror (isrvm)
• J302 (in body harness, approximately 19 cm (8 in) from breakout for g301)
• Left rear window switch
• Level comp fuse 47 40a
• Level comp relay 53
• Lock relay 63
• Nca
• Park lp-lt relay 58
• Park switch
• Pwr wdo circuit breaker 56 25a
• Rap-hc relay 70
• Rap1 fuse 28 10a
• Rap2 fuse 33 10a
• Rear defog fuse 46 40a
• Rear defog relay 52
• Right rear window switch
• Run 1 fuse 20 7.5a
• Run 2 fuse 10 10a
• Run relay 64
• Seat climate control module
• Sunroof control module (if equipped)
• Sunroof fuse 17 25a
• Tan
• Tan/ pnk
• To rear defog fuse 46 (diagram 4 of 5)
• Unlock relay 62
• Unlock/lock fuse 14 20a
• W/ custom seat
• W/ front heated seat cooling
• W/ heated nozzle
• W/ heated steering wheel leather wrapped
• W/ individual seat
• W/o front heated seat cooling
• Windshield outside moisture sensor (if equipped)
• Windshield washer solvent heater
• X276
• X277

Power Distribution Wiring Diagram (5 of 5) for Buick Lucerne CX 2009

List of elements for Power Distribution Wiring Diagram (5 of 5) for Buick Lucerne CX 2009:

• (3.9l)
• (4.6l)
• (in engine harness, approximately 3 cm (1 in) from branch for x139) j109
• (in engine harness, approximately 6 cm (2 in) from branch for engine coolant temperature (ect) sensor) j110
• (in engine harness, approximately 7 cm (4 in) from branch for x139 toward breakout for x138) j102
• (in even bank ignition coil harness, between x139 &
• (on right front of engine compt, forward of strut tower) underhood fuse block
• 3.9l
• 4.6l
• A/c cltch relay 34
• Acc
• Air pump relay 37
• Air sol relay 35
• Approximately 3 cm (1 in) from branch for x139) j109
• Body control module (bcm)
• Ecm/ crnk fuse 15a
• Emis dev fuse 15a
• Engine control module (ecm)
• Evaporative emission (evap) canister purge solenoid valve
• Fan 1 relay 33
• Fan 2 relay 31
• Fan 3 relay 32
• From emis dev fuse 7 (diagram 5 of 5)
• From ign-sw fuse 21 (diagram 3 of 5)
• From pwr/train relay 29 (diagram 1 of 5)
• Fuel inj even fuse 15a
• Fuel inj odd fuse 15a
• Fuel injector
• Fuel injector 4
• Fuel injector 5
• Fuel injector 6
• Heated oxygen sensor (ho2s) 1
• Heated oxygen sensor (ho2s) 2
• Heated oxygen sensor (ho2s) bank 1 sensor 1
• Heated oxygen sensor (ho2s) bank 2 sensor 1
• Ignition coil 1
• Ignition coil 2
• Ignition coil 3
• Ignition coil 4
• Ignition coil 5
• Ignition coil 6
• Ignition coil 7
• Ignition coil 8
• Ignition coil/module 8) j131
• Ignition control module (icm)
• Ignition switch
• Key-in switch
• Mass air flow (maf)/ intake aur temperature (iat) sensor
• Off
• Oxy snsr fuse 15a
• Pnk
• Pnk (in odd bank ignition coil harness,between x140 & ignition coil/module 7) j142
• Run
• Start
• Theft deterrent module (tdm)
• To fuel inj even fuse 3 (diagram 5 of 5)
• Underhood fuse block (on right front of engine compt, forward of strut tower)
• X203 & ignition switch connector) j201

POWER DOOR LOCKS

Power Door Locks Wiring Diagram for Buick Lucerne CX 2009

List of elements for Power Door Locks Wiring Diagram for Buick Lucerne CX 2009:

• (if equipped) keyless entry antenna
• (in body harness, approximately 9 cm (3 in) from branch for x314) j343
• (under center of rear package shelf) remote control door lock receiver (rcdlr)
• (under left rear seat) g301
• A11
• A12
• Battery
• Body control module (bcm) (right of glove box)
• Coax
• Computer data lines system
• Ddm fuse 22 15a
• Dr lock act ctrl
• 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)
• G406 (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)
• J301
• J337
• J385
• J700
• J800
• 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
• Lock relay 63
• Logic
• Low spd gmlan ser data
• Lr dr ajar sw sig
• Lr dr lk mtr unlock
• Lr dr open sw sig
• Mdls- body fuse 43 10a
• Nca
• Park lamp rly ctrl
• Pdm fuse 29 15a
• Pwr wdo circuit breaker 25a
• 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 lk mtr unlock
• Security ind
• Serial data
• Tan
• Tan/ red
• Tan/red
• Unlock relay 62
• Unlock/ lock fuse 14 20a
• W/ theft deterrent system
• W/o theft deterrent system

POWER MIRRORS

Electrochromic Mirror Wiring Diagram for Buick Lucerne CX 2009

List of elements for Electrochromic Mirror Wiring Diagram for Buick Lucerne CX 2009:

• (left rear of luggage compt) g402
• Automatic day/night mirror
• Button back lighting
• Day/night mirror sig
• Driver outside rear view mirror (in driver's door)
• Emergency ind
• Emergency switch
• Exterior lights system
• Hot w/ rap-hc relay 70 energized
• Ign
• Inside rearview mirror
• J312
• Keypad green led ind
• Keypad green led sig
• Keypad red led ind
• Keypad red led sig
• Keypad sig
• Logic
• Low ref
• Nca
• Onstar ind
• Onstar keypad
• Onstar switch
• Phone ind
• Phone switch
• Power distribution system
• Rap 2 fuse 33 10a
• Rear fuse block (below left side of rear seat)
• Vehicle communication interface module (vcim) (w/ onstar) (on right front of trunk, attached to seat back brace)

Power Mirrors Wiring Diagram for Buick Lucerne CX 2009

List of elements for Power Mirrors Wiring Diagram for Buick Lucerne CX 2009:

• 5v ref
• A12 x2
• Automatic day/night mirror
• Battery positive voltage
• Computer data lines system
• Ddm fuse 22 15a
• Defogger system
• Driver door module (ddm)
• Driver mir horz pos sens sig
• Driver mir ver pos sens sig
• Driver outside rear view mirror (in driver's door)
• Electrochromic mirror circuit
• Exterior lights system
• Front passenger door module (fpdm)
• Front passenger outside rear view mirror (in front passenger's door)
• Heating element
• Hot at all times
• Led ctrl
• Led sig
• Left mir mtr dn ctrl
• Left mir mtr left ctrl
• Left mir mtr up/right ctrl
• Low gmlan
• Low ref
• Nca
• Outside rearview mirror switch
• Pass mir horz pos sens sig
• Pass mir mtr left ctrl
• Pass mir ver pos sens sig
• Pdm fuse 29 15a
• Pnk
• 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
• W/ side obstacle detection sensor indicator

POWER SEATS

6-Way Power Seat Wiring Diagram for Buick Lucerne CX 2009

List of elements for 6-Way Power Seat Wiring Diagram for Buick Lucerne CX 2009:

• A11
• 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
• E12 x1
• 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
• J387
• Nca
• Passenger seat adjuster switch
• Pwr seat circuit breaker 55 25a
• Rear down
• Rear fuse block (below left side of rear seat)
• Rear up
• Rearward
• Red/ pnk
• Rf seat circuit breaker 54 25a
• Tan

8-Way Passenger Power Seat Wiring Diagram for Buick Lucerne CX 2009

List of elements for 8-Way Passenger Power Seat Wiring Diagram for Buick Lucerne CX 2009:

• E12 x1
• 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
• J306
• J348
• Nca
• Passenger seat adjuster switch
• Rear down
• Rear fuse block (below left side of rear seat)
• Rear up
• Rearward
• Recline forward
• Recline rearward
• Rf seat circuit breaker 54 25a
• Tan

Climate Control Seats Wiring Diagram (1 of 2) for Buick Lucerne CX 2009

List of elements for Climate Control Seats Wiring Diagram (1 of 2) for Buick Lucerne CX 2009:

• (4 in) from driver seat adjuster motor connector)
• (in driver seat harness, approximately 10 cm
• (in right front seat harness, approximately 7 cm (3 in) from breakout for passenger seat cushion ventilation heat & cool module) j358
• (in right front seat harness, approximately 7 cm (3 in) from passenger seat cushion ventilation heat & cool module connector) j357
• A12
• A3 x1
• B12
• Battery
• Climate control seat module
• Computer data lines system
• Cool control
• Ddm fuse 22 15a
• 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)
• G304 (under right front passenger's seat)
• Ground
• Heat control
• Heating element
• Hot at all times
• Hot w/ run relay energized
• Ign 3 vol
• J302 (w/ custom seat)
• J306
• J355
• J356 (in driver seat harness, approximately 9 cm (4 in) from driver seat cushion ventilation heat & cool module connector)
• Lh mode sig
• Low ref
• Mdl-frt fuse 9 30a
• Passenger seat back ventilation heating & cooling module
• Passenger seat cushion ventilation heating & cooling module
• Pdm fuse 29 15a
• Pnk
• Rear fuse block (below left side of rear seat)
• Rh mode sig
• Run 2 fuse 10 10a
• Sens low ref
• Sens sig
• Serial data
• Speed ctrl
• Sup volt
• Tan
• Tan/ red
• Tan/pnk
• Tan/red
• Thermistor
• X2 d4

Climate Control Seats Wiring Diagram (2 of 2) for Buick Lucerne CX 2009

List of elements for Climate Control Seats Wiring Diagram (2 of 2) for Buick Lucerne CX 2009:

• 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
• Driver door module (ddm)
• Driver heated & cooled seat switch
• 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 ctrl module
• Heated seat cushion ind
• Heated seat ind
• High ind ctrl
• High temp ind
• Lamp dimming
• Low ind ctrl
• Low ref
• Low temp ind
• Medium ind ctrl
• Medium temp ind
• Memory seat module (on underside of driver's seat, on seat adjuster frame)
• Pnk
• Rh seat mode signal
• Seat back heat switch
• Tan
• Tan/red

Heated Seats Wiring Diagram for Buick Lucerne CX 2009

List of elements for Heated Seats Wiring Diagram for Buick Lucerne CX 2009:

• (in driver seat harness, between driver position module & left front cushion heated seat element) j359
• (in right front seat harness, between x314 & left front cushion heated seat element) j360
• Battery pos volt
• Computer data lines system
• Drv cushion temp sens sig rh seat cushion temp sens sig rh seat back temp sens sig drv seat back temp sens sig x5
• G300 (under driver's seat)
• Gmlan serial data
• Ground
• Heating element
• Hot at all times
• J305
• Left front back heated seat element
• Left front cushion heated seat element
• Lh back element ctrl
• Lh back sens low ref
• Lh cushion element ctrl
• Lh temp sens low ref
• Mdl-mem fuse 6 10a
• Memory seat module (on underside of driver's seat, on seat adjuster frame)
• Pnk
• Rear fuse block (below left side of rear seat)
• Rh back sens low ref
• Rh cushion element ctrl
• Rh element ctrl
• Rh temp sens low ref
• Right front cushion heated seat element
• Right front heated seat back element
• Thermistor
• X1 d5

Heated Steering Wheel Wiring Diagram for Buick Lucerne CX 2009

List of elements for Heated Steering Wheel Wiring Diagram for Buick Lucerne CX 2009:

• (under driver's seat) g300
• D x277
• F3 x2
• G300 (under driver's seat)
• Gnd
• H x277
• Heated steering wheel
• Heated steering wheel control module
• Heated steering wheel on ind
• Heated steering wheel switch
• High ctrl
• Hot w/ run relay energized
• Ign
• Inflatable restraint steering wheel module coil (top of steering column)
• J204
• J219 (in steering column harness, between horn switch & inflatable restraint steering wheel module coil)
• Left heated steering wheel element
• Left steering wheel control switch
• Nca
• Rear fuse block (below left side of rear seat)
• Red
• Right heated steering wheel element
• Run 1 fuse 20 7.5a
• Sens sig
• Sw led ctrl
• Sw sig
• X276 d
• X276 h

Lumbar Wiring Diagram for Buick Lucerne CX 2009

List of elements for Lumbar Wiring Diagram for Buick Lucerne CX 2009:

• Down
• E12
• Forward
• G304 (under right front passenger's seat)
• Hot at all times
• J306 (w/ 8 way)
• J348 (w/ 8 way)
• Passenger lumbar adjuster switch
• Passenger seat lumbar motor
• Pnk
• Rear fuse block (below left side of rear seat)
• Rearward
• Rf seat circuit breaker 54 25a

POWER TOP/SUNROOF

Power Top/Sunroof Wiring Diagram for Buick Lucerne CX 2009

List of elements for Power Top/Sunroof Wiring Diagram for Buick Lucerne CX 2009:

• (not used)
• Accessory vol
• B +
• Close ctrl
• Dimming
• E11
• G402 (left rear of luggage compt)
• G403 (right front wall of luggage compt)
• Ground
• Hot w/ rap hc relay energized
• Interior lights system
• J313
• J330
• Open ctrl
• Pnk
• Power distribution system
• Rap 2 fuse 33 10a
• Rear fuse block (below left side of rear seat)
• Roof close
• Roof express
• Roof open
• Roof sw data 1
• Roof sw data 2
• Roof sw data 3
• Roof sw data 4
• Roof sw data 5
• Roof sw data 6
• Sunroof control module (rear of sunroof opening)
• Sunroof fuse 17 25a
• Sunroof motor
• Sunroof switch
• Tan
• Vent close
• Vent express
• Vent open
• X399

POWER WINDOWS

Power Windows Wiring Diagram for Buick Lucerne CX 2009

List of elements for Power Windows Wiring Diagram for Buick Lucerne CX 2009:

• (under left rear seat) g301
• (under right front passenger's seat) g304
• A11
• Batt volt
• Body control module (bcm) (right of glove box)
• Computer data lines system
• 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)
• Ft pass wndo mtr
• G300 (under driver's seat)
• G304 (under right front passenger's seat)
• Gmlan serial data
• Ground
• Hot at all times
• Interior lights system
• J337
• J700
• J800
• Left front down ctrl
• Left front up ctrl
• Left rear down ctrl
• Left rear down sig
• Left rear up ctrl
• Left rear up sig
• Left rear window motor (in left rear door)
• Left rear window switch
• Logic
• Master sw sig
• Pwr wdo circuit breaker 56 25a
• Rear fuse block (below left side of rear seat)
• 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)
• Right rear window switch
• Sply volt

RADIO

Radio Wiring Diagram, with Amplifier (1 of 2) for Buick Lucerne CX 2009

List of elements for Radio Wiring Diagram, with Amplifier (1 of 2) for Buick Lucerne CX 2009:

• (on right front of trunk, attached to seat back brace) (if equipped) vehicle communication interface module (vcim)
• (or 7043)
• (or 7044)
• (under driver's seat) g305
• Amplifier control
• Antenna sig
• Antenna signal
• Anti-lock brakes system
• Audio common sig
• Backlight lamp ctrl
• Bare
• Battery
• Battery pos voltage
• Cellular navigation & digital radio antenna (if equipped) (center rear of roof)
• Computer data lines system
• Device left audio sig
• Digital radio receiver (drr) (at left "d" pillar)
• Drain wire
• Drain wire audio lo ref
• Front audio drain wire
• G305 (under driver's seat)
• Global positioning system (gps) antenna (under top center of dash)
• Gps antenna
• Ground
• Hot at all times
• Interior lights system
• Left audio sig (+)
• Left audio signal (+)
• Left audio signal (-)
• Lf low level audio (-)
• Lf low level audio sig
• Low speed gmlan serial data
• Lr low level audio (-)
• Lr low level audio sig (+)
• Navigation system
• Navigation voice sig voice recognition audio sig
• Pnk
• Radio
• Radio antenna module (at right "d" pillar)
• Radio fuse 44 15a
• Rear audio drain wire
• Rear fuse block (below left side of rear seat)
• Remote enable sig
• Rf low level audio (-)
• Rf low level audio sig
• Right audio sig (+)
• Right audio sig (-)
• Right audio signal (+)
• Right audio signal (-)
• Rr low level audio (-)
• Rr low level audio sig (+)
• Serial data
• Tan
• Tan/red
• Vehicle speed sig
• W/ onstar
• W/o onstar

Radio Wiring Diagram, with Amplifier (2 of 2) for Buick Lucerne CX 2009

List of elements for Radio Wiring Diagram, with Amplifier (2 of 2) for Buick Lucerne CX 2009:

• Amp-rdo fuse 38 30a
• Amplifier (mounted to left rear of rear seat)
• Amplifier ctrl
• Battery
• Body control module (bcm) (right of glove box)
• Center i/p speaker
• Computer data lines system
• Cruise control system
• Ctrl sig
• E11 x3
• F cen spkr (+)
• F cen spkr (-)
• G305 (under driver's seat)
• Ground
• Hot at all times
• Inflatable restraint steering wheel module coil (top of steering column)
• Info
• J361 (in body harness, between x300 & amplifier)
• J362 (in body harness, between x300 & amplifier)
• J363 (in body harness, between x301 & amplifier)
• J364 (in body harness, between x301 & amplifier)
• J365
• J366
• Left front door speaker
• Left front tweeter speaker
• Left rear speaker
• Lf low level (-)
• Lf low level sig
• Lf speaker (+)
• Lf spkr sig (-)
• Lo spd
• Lr low level (-)
• Lr low level sig
• Lr mid spkr (+)
• Lr mid spkr (-)
• Lr speaker (-)
• Lr spkr sig (+)
• Module coil) j220
• Mute
• Nca
• Pnk
• Rear fuse block (below left side of rear seat)
• Remote enable sig
• Rf low level (-)
• Rf low level sig
• Rf speaker (+)
• Rf spkr sig (-)
• Right front door speaker
• Right front tweeter 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 (-)
• Seek dn
• Seek up
• Ser data
• Source
• Tan
• Tan/red
• Volt sply
• Volume dn
• Volume up
• X276
• X277

Radio Wiring Diagram, without Amplifier for Buick Lucerne CX 2009

List of elements for Radio Wiring Diagram, without Amplifier for Buick Lucerne CX 2009:

• (in body harness, between x300 & amplifier) j362
• (in body harness, between x301 & amplifier) j363
• (on right front of trunk, attached to seat back brace) (if equipped) vehicle communication interface module (vcim)
• (or 7043)
• (or 7044)
• (under driver's seat) g305
• Antenna sig
• Anti-lock brakes system
• Audio common sig
• Backlight lamp ctrl
• Bare
• Batt pos volt
• Battery
• Body control module (bcm) (right of glove box)
• Cellular navigation & digital radio antenna (center rear of roof)
• Computer data lines system
• Cruise control system
• Ctrl sig
• Device left audio sig
• Digital radio receiver (drr) (if equipped) (at left "d" pillar)
• Drain wire
• Drain wire audio lo ref
• G305 (under driver's seat)
• Global positioning system (gps) antenna (under top center of dash)
• Gps antenna
• Ground
• Hot at all times
• Inflatable restraint steering wheel module coil (top of steering column)
• Info
• Interior lights system
• J220 (in steering column harness, between cruise control on/off switch & inflatable restraint steering wheel module coil)
• J361 (in body harness, between x300 & amplifier)
• J364 (in body harness, between x301 & amplifier)
• Left audio sig (+)
• Left audio signal (-)
• Left front door speaker
• Left front spkr (+)
• Left front spkr sig (-)
• Left front tweeter speaker
• Left rear speaker
• Lo spd gmlan serial data
• Lo spd ser data
• Lr midrange speaker (-)
• Lr midrange spkr (+)
• Lt audio sig (+)
• Lt audio sig (-)
• Mute
• Navigation system
• Navigation voice sig recognition audio sig
• Nca
• Pnk
• Radio
• Radio antenna module (at right "d" pillar)
• Radio fuse 44 15a
• Rear fuse block (below left side of rear seat)
• Remote enable sig
• Remote enable sig (12v)
• Right audio signal (+)
• Right audio signal (-)
• 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 (-)
• Rt audio sig (+)
• Rt audio sig (-)
• Seek dn
• Seek up
• Serial data
• Source
• Sply volt
• Tan
• Vehicle speed sig
• Volume dn
• Volume up
• W/ onstar
• W/o onstar
• X276
• X277

SHIFT INTERLOCK

Shift Interlock Wiring Diagram for Buick Lucerne CX 2009

List of elements for Shift Interlock Wiring Diagram for Buick Lucerne CX 2009:

• 3.9l
• 4.6l
• 5 volt ref
• A3 x1
• Automatic transmission
• Automatic transmission a/t shift lock control solenoid
• Automatic transmission floor shifter assembly (w/ custom seat)
• Automatic transmission internal mode switch (ims)
• B7 x2
• Body control module (bcm) (right of glove box)
• Brake pedal position (bpp) sensor (top of brake pedal assembly)
• Computer data lines system
• Data bus +
• Data bus -
• Engine control module (ecm) (left side of engine compt)
• G112 (lower left rear of engine)
• G300 (under driver's seat)
• G304 (under right front passenger's seat)
• Hot w/ rap-hc relay 70 energized
• Hot w/ run relay 64 energized
• Ignition lock cylinder control solenoid
• J105
• J204
• J302 (w/ climate control seats)
• J381
• J383
• Low ref
• Nca b
• Nca c
• Nca d
• Nca e
• Nca f
• Park switch
• Rap 1 fuse 28 10a
• Rear fuse block (below left side of rear seat)
• Reverse lockout solenoid
• Run 2 fuse 10 10a
• Sensor sig
• Sol ctrl
• Supp volt
• Sw sig a
• Sw sig b
• Sw sig c
• Sw sig 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 CX 2009

List of elements for Charging Wiring Diagram for Buick Lucerne CX 2009:

• 3.9l
• 4.6l
• Battery
• Battery current sensor (below right side of rear seat)
• Battery positive volt
• Bcm (lttn) fuse 25 15a
• Body control module (bcm) (right of glove box)
• Charge ind
• Computer data lines system
• Current sensor low ref
• Current sensor sig
• Engine control module (ecm) (left side of engine compt)
• Fusible link
• G303 (below right side of rear seat)
• Gen field duty sig
• Gen turn on-sig
• Generator
• Ground
• Hi speed gmlan serial data +
• Hi speed gmlan serial data -
• Ign
• Instrument panel cluster (ipc)
• Lo spd gmlan serial data
• Logic
• Pnk
• Rear fuse block (below left side of rear seat)
• Red
• Serial data
• Starter motor
• Tan
• Underhood fuse block (on right front of engine compt, forward of strut tower)

Starting Wiring Diagram for Buick Lucerne CX 2009

List of elements for Starting Wiring Diagram for Buick Lucerne CX 2009:

• (or pnk)
• 3.9l
• 4.6l
• 5 volt ref
• Acc
• Automatic transmission
• Automatic transmission internal mode switch (ims)
• Battery
• Body control module (bcm) (right of glove box)
• Charging circuit
• Computer data lines system
• Ecm/ crank fuse 1 15a
• Ecm/pcm fuse 9 10a
• Engine control module (ecm) (left side of engine compt)
• 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 -
• Hi speed serial data
• Hot at all times
• Hot w/ pwr/train relay 29 energized
• Ign 1 volt
• Ign relay 36
• Ign sw fuse 21 5a
• Ign vol
• Ign vol (run/crank)
• Ignition switch
• J105
• Off
• Off/run/crank volt
• Park/neutral sig
• Pnk
• Rear fuse block (below left side of rear seat)
• Red
• Run
• Start
• Starter motor
• Starter rly
• Strtr fuse 24 40a
• Strtr relay 30
• Tan
• Underhood fuse block (on right front of engine compt, forward of strut tower)
• X175

SUPPLEMENTAL RESTRAINTS

Supplemental Restraints Wiring Diagram (1 of 2) for Buick Lucerne CX 2009

List of elements for Supplemental Restraints Wiring Diagram (1 of 2) for Buick Lucerne CX 2009:

• (in body harness, approximately 42 cm (17 in) from breakout for yaw & lateral acceleration sensor) j370
• (in steering wheel) inflatable restraint steering wheel module
• (right side of dash) inflatable restraint i/p module
• (under right front
• Air bag fuse 11 10a
• Batt positive vol
• Case ground
• Computer data lines system
• Driver seat belt buckle
• Driver seat belt switch
• Ground
• High control
• Hot w/ ign 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 compt)
• 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)
• 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 compt)
• 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)
• 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: 4-5, 6-7, 8-9, 10-11, 14-15, 20-21, 22-23 & 26-27)
• X207 a1
• X211

Supplemental Restraints Wiring Diagram (2 of 2) for Buick Lucerne CX 2009

List of elements for Supplemental Restraints Wiring Diagram (2 of 2) for Buick Lucerne CX 2009:

• (left rear of luggage compt) g402
• (under driver's seat) g300
• Air bag ind
• Batt positive vol
• Belt tension sensor
• Computer data lines system
• Driver seat belt pretensioner
• 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 seat belt tension sensor
• Instrument panel cluster (ipc)
• J312
• 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
• Passenger seat belt buckle
• Passenger seat belt pretensioner
• Pnk
• Pnk/ red
• Pnk/red
• Pnk/tan
• Rear fuse block (below left side of rear seat)
• Right inflatable restraint roof rail module (if equipped) (right roof rail)
• Sdm fuse 30 10a
• Seat belt ind
• Sensor signal
• Serial data
• Shorting bar
• Tan
• Tan/pnk
• Voltage reference

TRANSMISSION

3.9L VIN 1

3.9L VIN 1, Transmission Wiring Diagram for Buick Lucerne CX 2009

List of elements for 3.9L VIN 1, Transmission Wiring Diagram for Buick Lucerne CX 2009:

• (lower left rear of engine) g112
• 1-2 shift solenoid (ss) valve
• 2-3 shift solenoid (ss) valve
• Acc
• Acc voltage
• Acc wakeup serial data x4
• Atf position switch
• Automatic transmission
• Automatic transmission fluid pressure (tfp) manual valve position switch
• Automatic transmission fluid temperature (tft) sensor
• Automatic transmission input shaft speed (iss) sensor
• Automatic transmission internal mode switch (ims)
• Battery
• Body control module (bcm) (right of glove box)
• Computer data lines system
• Driver information center (dic) display
• Ecm/tcm fuse 5 15a
• Engine control module (ecm) (left side of engine compt)
• Exterior lights system
• G112 (lower left rear of engine)
• Gmlan serial data
• Ground
• Hot at all times
• Hot w/ ign relay 36 energized
• Ign 1
• Ignition switch
• Instrument panel cluster (ipc)
• Iss high sig
• Iss low sig
• J100
• J104 (in engine harness, approximately 13 cm (5 in) from breakout for x138)
• J105
• J111
• J115
• J201
• Logic
• Low ref
• Nca
• Off
• P/n sig
• Pc sol hi ctrl
• Pc sol vlv ctrl
• Pnk
• Pressure control (pc) solenoid valve
• Rear fuse block (below left side of rear seat)
• Red
• Run
• Serial data
• Serial data bus+
• Serial data bus-
• Shift sol vlv a
• Shift sol vlv b
• Start
• Stop lamp sw sig
• Tan
• Tan b
• Tcc sol ctrl
• Tft sens sig
• Torque converter pulse width modulation(pwm) solenoid valve
• Trans ign 1 fuse 8 10a
• Trans range a
• Trans range b
• Trans range c
• Trans range p
• Transmission control module (tcm)
• Underhood fuse block (on right front of engine compt, forward of strut tower)
• Vehicle speed (vss) sensor (in transmission)
• Vss hi sig
• Vss low sig

3.9L VIN M

3.9L VIN M, Transmission Wiring Diagram for Buick Lucerne CX 2009

List of elements for 3.9L VIN M, Transmission Wiring Diagram for Buick Lucerne CX 2009:

• (lower left rear of engine) g112
• 1-2 shift solenoid (ss) valve
• 2-3 shift solenoid (ss) valve
• Acc
• Acc voltage
• Acc wakeup serial data x4
• Atf position switch
• Automatic transmission
• Automatic transmission fluid pressure (tfp) manual valve position switch
• Automatic transmission fluid temperature (tft) sensor
• Automatic transmission input shaft speed (iss) sensor
• Automatic transmission internal mode switch (ims)
• Battery
• Body control module (bcm) (right of glove box)
• Computer data lines system
• Driver information center (dic) display
• Ecm/tcm fuse 5 15a
• Engine control module (ecm) (left side of engine compt)
• Exterior lights system
• G112 (lower left rear of engine)
• Gmlan serial data
• Ground
• Hot at all times
• Hot w/ ign relay 36 energized
• Ign 1
• Ignition switch
• Instrument panel cluster (ipc)
• Iss high sig
• Iss low sig
• J100
• J104 (in engine harness, approximately 13 cm (5 in) from breakout for x138)
• J105
• J111
• J115
• J201
• Logic
• Low ref
• Nca
• Off
• P/n sig
• Pc sol hi ctrl
• Pc sol vlv ctrl
• Pnk
• Pressure control (pc) solenoid valve
• Rear fuse block (below left side of rear seat)
• Red
• Run
• Serial data
• Serial data bus+
• Serial data bus-
• Shift sol vlv a
• Shift sol vlv b
• Start
• Stop lamp sw sig
• Tan
• Tan b
• Tcc sol ctrl
• Tft sens sig
• Torque converter pulse width modulation(pwm) solenoid valve
• Trans ign 1 fuse 8 10a
• Trans range a
• Trans range b
• Trans range c
• Trans range p
• Transmission control module (tcm)
• Underhood fuse block (on right front of engine compt, forward of strut tower)
• Vehicle speed (vss) sensor (in transmission)
• Vss hi sig
• Vss low sig

4.6L VIN 9

4.6L VIN 9, Transmission Wiring Diagram for Buick Lucerne CX 2009

List of elements for 4.6L VIN 9, Transmission Wiring Diagram for Buick Lucerne CX 2009:

• (in engine harness, approximately 13 cm (5 in) from breakout for x138) j104
• (in transmission) vehicle speed sensor (vss)
• (right of glove box) body control module (bcm)
• 1-2 shift solenoid valve
• 2-3 shift solenoid valve
• Acc
• Automatic transmission
• Automatic transmission input shaft speed (iss) sensor
• Battery
• Computer data lines system
• Ecm/tcm fuse 5 15a
• Engine control module (ecm) (left side of engine compartment)
• Exterior lights system
• G112 (lower left rear of engine)
• Gmlan serial data
• Ground
• Hot at all times
• Hot w/ ign relay 36 energized
• Ign 1
• Ignition switch
• Iss high sig
• Iss low sig
• J100
• J105
• J111
• J201
• Low ref
• Nca
• Off
• P/n signal
• Pc sol hi ctrl
• Pc sol vlv ctrl
• Pnk
• Pnk e
• Pnk u
• Pressure control (pc) solenoid valve
• Rear fuse block (below left side of rear seat)
• Run
• Serial data
• Serial data bus+
• Serial data bus-
• Shift sol vlv a
• Shift sol vlv b
• Start
• Stop lamp sw sig
• Tan
• Tan m
• Tcc sol ctrl
• Tft sens sig
• Torque converter clutch (tcc) solenoid valve
• Trans ign 1 fuse 8 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 (tft) sensor
• Transmission internal mode switch (ims)
• 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 CX 2009

List of elements for Trunk Release Wiring Diagram for Buick Lucerne CX 2009:

• (under right front passenger's seat) g304
• A8 x1
• Body control module (bcm) (right of glove box)
• G301 (under left rear seat)
• G402 (left rear of luggage compt)
• Headlamp switch
• Hot at all times
• Interior lights system
• J206
• Rear compartment lid latch (center rear of luggage compt)
• Rear fuse block (below left side of rear seat)
• Trk rel fuse 37 10a
• Trk rel relay 67
• Trunk ajar sw sig x6
• Trunk release ctrl x2
• Trunk release relay ctrl x7
• X2 b8
• X3 e10

WARNING SYSTEMS

Chime Wiring Diagram for Buick Lucerne CX 2009

List of elements for Chime Wiring Diagram for Buick Lucerne CX 2009:

• (on master cylinder reservoir) brake fluid level switch
• (w/ rke) keyless entry antenna
• Acc
• Audible alarm
• Auto
• Battery positive volt
• Bcm (chmsl) fuse 39 10a
• Bcm (lttn) fuse 25 15a
• Bcm (rttn) fuse 36 15a
• Body control module (bcm) (right of glove box)
• Brake ind
• Coax
• Computer data lines system
• D9 x2
• Driver door latch assembly (rear of driver's door)
• Driver door module (ddm)
• Driver information center (dic)
• Driver seat belt buckle
• Driver seat belt switch
• Drv seat belt sw sig
• Engine coolant temperature ind
• Exterior lights system
• G300 (under driver's seat)
• G304 (under right front passenger's seat)
• G406 (left "c" pillar)
• Gmlan
• Gmlan serial data
• Gmlan serial data gmlan serial data
• Ground
• Head
• Headlamp switch
• Hot at all times
• Ignition switch
• Inflatable restraint sensing & diagnostic module (sdm) (under center console)
• Instrument panel cluster (ipc)
• Ipc
• J206
• J370 (in body harness, approximately 42 cm (17 in) from breakout for yaw & lateral acceleration sensor)
• J385
• Key-in ignition switch
• Keyless entry/ tire pressure antenna signal
• Lf door ajar sw sig
• Lf door open sw sig
• Lf door sw low ref
• Logic
• Low engine oil pressure ind
• Low ref
• Low spd serial data
• Low tire pressure ind
• Lt turn switch sig
• Nca
• Off
• Off/run crank vol
• Park
• Park brake sw sig
• Park brake switch (on top of park brake assembly)
• Park lp sw sig
• Radio
• Rear fuse block (below left side of rear seat)
• Remote control door lock receiver (rcdlr) (under center of rear package shelf)
• Rt turn switch sig
• Run
• Seat belt ind
• Start
• Sw-ign fuse 21 5a
• Tan/ pnk
• Tan/pnk
• W/ theft deterrent system
• W/o theft deterrent system
• X3 e12

Lane Departure Warning Wiring Diagram for Buick Lucerne CX 2009

List of elements for Lane Departure Warning Wiring Diagram for Buick Lucerne CX 2009:

• (left rear of luggage compt) g402
• (under driver's seat) g300
• B1 x3
• Batt
• Computer data lines system
• Driver information center (dic)
• Gnd
• Headlamp switch
• Hot at all times
• Instrument panel cluster (ipc)
• Interior lights system
• J203
• J312
• J392
• Lane departure ind
• Lane dept warn ctrl
• Lane dept warn on sig
• Left turn ind
• Logic
• Mdls- body fuse 43 10a
• Rear fuse block (below left side of rear seat)
• Right turn ind
• Serial data
• Vehicle direction alert alarm warning module

WIPER/WASHER

Wiper/Washer Wiring Diagram for Buick Lucerne CX 2009

List of elements for Wiper/Washer Wiring Diagram for Buick Lucerne CX 2009:

• Acc volt
• Batt pos volt
• Body control module (bcm) (right of glove box)
• Delay switch
• Driver information center (dic) display
• Fluid sw sig wash fluid suply volt
• 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
• High
• High speed rly ctrl
• Hot at all times
• Hot w/ rap-hc relay 70 energized
• Hot w/ run relay 64 energized
• Instrument panel cluster (ipc)
• Int
• J204
• J312
• Logic
• Low
• Low washer fluid ind sig
• Mist
• Off
• Park sw sig
• Park switch
• Pnk
• Power distribution system
• Rap 2 fuse 33 10a
• Rear fuse block (below left side of rear seat)
• Run 2 fuse 10 10a
• Run ign 3 volt
• 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 outside moisture sensor (if equipped) (above rearview mirror on windshield)
• Windshield wash
• 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 25a
• Wpr hi pcb relay
• Wpr pcb relay
• Wsh pcb relay
• Wsw htr fuse 60a
• Wsw mtr fuse 19 15a
• X1 j3
• X2 k2