Разделы схем — 33 (всего 79)
AIR CONDITIONING ANTI-LOCK BRAKES ANTI-THEFT BODY CONTROL MODULES COMPUTER DATA LINES COOLING FAN CRUISE CONTROL DEFOGGERS ELECTRONIC POWER STEERING ELECTRONIC SUSPENSION ENGINE PERFORMANCE EXTERIOR LIGHTS GROUND DISTRIBUTION HEADLIGHTS HORN INSTRUMENT CLUSTER INTERIOR LIGHTS MEMORY SYSTEMS NAVIGATION POWER DISTRIBUTION POWER DOOR LOCKS POWER MIRRORS POWER SEATS POWER TOP/SUNROOF POWER WINDOWS RADIO SHIFT INTERLOCK STARTING/CHARGING SUPPLEMENTAL RESTRAINTS TRANSMISSION TRUNK, TAILGATE, FUEL DOOR WARNING SYSTEMS WIPER/WASHER
AIR CONDITIONING Automatic A/C Wiring Diagram (1 of 2) for Buick Lucerne CXS 2007 List of elements for Automatic A/C Wiring Diagram (1 of 2) for Buick Lucerne CXS 2007: 76 (approximately 7 cm (3 in) from branch for hazard lamp switch) s202 (in engine harness, approximately 7 cm (3 in) from branch for throttle body assembly) (in i/p harness, approximately 41 cm (16 in) from branch for hazard lamp switch) s210 (lower left rear of engine) (under driver's seat) g300 (under right front passenger's seat) g304 3.8l 4.6l 5 volt ref A/c compressor clutch (on a/c compressor) Air temp motor ctrl Ambient air temp sens sig Ambient air temperature sensor (on center front of engine compt, on hood latch brace) Ambient light sensor sig Backlight lamp ctrl Batt pos vol Batt pos volt Blower motor (behind right side of dash) Blower motor control module (near blower motor) Body control module (bcm) (right of glove box) Cold Computer data lines system Defogger system Drv air temp dr ctrl a Drv air temp dr ctrl b Drv air temp dr pos sig Engine coolant hot Evap low temp sens sig Evaporator temperature sensor (left of blower motor) G112 G115 G300 (under driver's seat) Gmlan serial data Gnd Hot Hot at all times Hvac blwr fuse 40a Hvac control module I/p harn mdl fuse 10a Ign 1 volt Inside air temp sens sig Inside air temperature sensor (under left side of dash, left of steering column) Interior lights system L sunload sens sig Led dimming sig Left sunload sensor signal Logic Low ref Low reference Low speed gmlan serial data Lower mode dr ctrl b Lower mode dr pos sig Message center Message req Mode door control a Pass air temp dr ctrl b Pass air temp dr pos Pnk Power distribution system R sunload sens sig Radio Rear defog rly ctrl Rear fuse block (below left side of rear seat) Recir dr ctrl a Recir dr ctrl b Recir valve sol sig Recirculation actuator (behind right side of dash, right of blower motor) Right sunload sensor signal S106 S200 (approximately 6 cm (2 in) from branch for hvac module) S203 (approximately 36 cm (14 in) from breakout for hvac module) S387 Solid state Speed ctrl Sunload twilight sensor (top center of dash) Tan Automatic A/C Wiring Diagram (2 of 2) for Buick Lucerne CXS 2007 List of elements for Automatic A/C Wiring Diagram (2 of 2) for Buick Lucerne CXS 2007: 48 (3.8l) (3.8l: left front of engine compt, inside air cleaner housing) (4.6l: left side of engine compt) engine control module (ecm) powertrain control module (pcm) (4.6l) (in hvac harness, between evaporator temperature sensor & c202) s227 (in hvac harness, between hvac control module & mode motors) (or tan) 3.8l 4.6l 5v ref 1 A/c fuse 10a A/c refrigerant pressure sensor (near a/c compressor, on hose assembly) A/c relay Clutch rly ctrl Cold Computer data lines system Cool/ fan 1 relay Cool/ fan 2 relay Cool/ fan relay Def Driver air temperature actuator (left side of hvac module) Dry air temp signal Ect sens sig Engine coolant temperature (ect) sensor (3.8l: left rear of engine) (4.6l: right rear of engine) Fan 1 fuse 30a Fan 2 fuse 30a Front passenger air temperature actuator (right side of hvac module) G104 (right front corner of engine compt) Gmlan serial data + Gmlan serial data - Hi speed rly ctrl Hot Hot at all times Hot in run or start Hot w/ run/crnk relay energized Hvac/ ipc fuse 10a Left cooling fan (on left rear side of radiator) Low ref Low speed rly ctrl Mode actuator (on right side of hvac module) Mode valve signal Pass air temp signal Pnk Press sens sig Right cooling fan (on right rear side of radiator) S226 Tan Underhood fuse block (on right front of engine compt, forward of strut tower) Vent Compressor Wiring Diagram for Buick Lucerne CXS 2007 List of elements for Compressor Wiring Diagram for Buick Lucerne CXS 2007: 23 (in engine harness, approximately 7 cm (3 in) from branch for throttle body assembly) s106 (lower left rear of engine) 3.8l 4.6l 4.6l 3.8l 5 volt ref 1 A/c compressor clutch (on a/c compressor) A/c fuse 10a A/c refrigerant pressure sensor (near a/c compressor, on hose assembly) A/c relay Clutch rly ctrl Computer data lines system G112 G115 Gmlan serial data + Gmlan serial data - Hot at all times Hot in run or start Low ref Powertrain control module (pcm) (3.8l) engine control module (ecm) (4.6l) (3.8l: left front of engine compt, inside air cleaner housing) (4.6l: left side of engine compt) Sensor signal Tan Underhood fuse block (on right front of engine compt, forward of strut tower) Manual A/C Wiring Diagram (1 of 2) for Buick Lucerne CXS 2007 List of elements for Manual A/C Wiring Diagram (1 of 2) for Buick Lucerne CXS 2007: 59 (approximately 36 cm (14 in) from breakout for hvac module) (in hvac harness, between evaporator temperature sensor & c202) (in hvac harness, between hvac control module & mode motors) (in i/p harness, approximately 41 cm (16 in) from branch for hazard lamp switch) s210 (under right front passenger's seat) g304 5 volt ref A/c compressor clutch (on a/c compressor) Air temp dr ctrl b Air temp dr pos sig Air temperature actuator (right side of hvac module) Ambient air temp sens sig Ambient air temperature sensor (on center front of engine compt, on hood latch brace) Backlight lamp ctrl Batt pos vol Batt pos volt Blower motor (behind right side of dash) Blower motor control module (near blower motor) Cold Computer data lines system Def Defogger system Driver air temp signal Drv air temp dr ctrl a Evap low temp sens sig Evap temperature sensor (left of blower motor) G112 (lower left rear of engine) G300 (under driver's seat) Gnd Hot Hot at all times Hvac blwr fuse Hvac control module I/p harn mdl fuse 10a Ign 1 volt Interior lights system Led dimming sig Logic Low mode dr pos sig Low ref Low speed gmlan serial data Lower mode dr ctrl b Mode actuator (on right side of hvac module) Mode dr ctrl a Mode valve signal Pnk Power distribution system Rear defog rly ctrl Rear fuse block (below left side of rear seat) Recir door a ctrl Recir door b ctrl Recirculation actuator (behind right side of dash, right of blower motor) S200 (approximately 6 cm (2 in) from branch for hvac module) S203 S226 S227 S387 Speed ctrl Tan Vent Manual A/C Wiring Diagram (2 of 2) for Buick Lucerne CXS 2007 List of elements for Manual A/C Wiring Diagram (2 of 2) for Buick Lucerne CXS 2007: 31 5v ref 1 A/c fuse 10a A/c refrigerant pressure sensor (near a/c compressor, on hose assembly) A/c relay Clutch rly ctrl Computer data lines system Cool/ fan 1 relay Cool/ fan 2 relay Cool/ fan relay Ect sens sig Engine coolant temperature (ect) sensor (left rear of engine) Fan 1 fuse 30a Fan 2 fuse 30a G104 (right front corner of engine compt) Gmlan serial data + Gmlan serial data - Hi speed rly ctrl Hot at all times Hot in run or start Hot w/ run/crnk relay energized Hvac/ ipc fuse 10a Left cooling fan (on left rear side of radiator) Low ref Low speed rly ctrl Pnk Powertrain control module (pcm) (left front of engine compt, inside air cleaner housing) Press sens sig Right cooling fan (on right rear side of radiator) S229 (in ip harness, between c201 & c202) Tan Underhood fuse block (on right front of engine compt, forward of strut tower)
ANTI-LOCK BRAKES Anti-lock Brakes Wiring Diagram (1 of 2) for Buick Lucerne CXS 2007 List of elements for Anti-lock Brakes Wiring Diagram (1 of 2) for Buick Lucerne CXS 2007: 64 (base of steering column) (w/ active brake control) steering angle sensor (left front corner of engine compt) electronic brake control module (ebcm) (not used) (on floor pan, left of center console) (w/ active brake control) yaw & lateral acceleration sensor 5v ref Abs 1 fuse 50a Abs 2 fuse 60a Abs ind Batt pos volt Brake pressure modulator valve (bpmv) Computer data lines system Electronic power steering system Erometer sig long accel- G114 (lower left rear of engine) Gmlan (bcm) Gmlan (ebcm) Ground High effort ctrl Hot at all times Hot w/ run/crnk relay energized Hvac fuse 10a Ign Ign 1 volt Instrument panel cluster (ipc) Lateral accel- erometer sig Lateral accelerometer sig Left front inlet Left front isolation Left front outlet Left front prime Left rear inlet Left rear outlet Logic Long accelerometer signal Low effort ctrl Low ref Low reference Motor ctrl Pnk Position signal a Position signal b Power distribution system Radio Red Right front inlet Right front isolation Right front outlet Right front prime Right rear inlet Right rear outlet Sensor signal Serial data Serial data (+) Serial data (-) Serial data wake up Sol valve ctrl Solenoid valves Stability control ind Tan Underhood fuse block (on right front of engine compt, forward of strut tower) Vehicle speed signal Vss Yaw rate diagnostic Yaw rate sensor sig Anti-lock Brakes Wiring Diagram (2 of 2) for Buick Lucerne CXS 2007 List of elements for Anti-lock Brakes Wiring Diagram (2 of 2) for Buick Lucerne CXS 2007: 29 (in engine harness, approximately 47 cm (19 in) from right front wheel speed sensor) s114 (in engine harness, approximately 53 cm (21 in) from left front wheel speed sensor) s113 (in engine harness, approximately 53 cm (21 in) from right front wheel speed sensor) s116 (under right front passenger's seat) (w/o individual seat) g304 (w/ individual seat) s204 Body control module (bcm) (right of glove box) Brake pedal position sensor (top of brake pedal assembly) Computer data lines system G300 (w/ individual seat) (under driver's seat) Interior lights system Left front wheel speed sensor (wss) (on left front brake assembly, on back of hub) Left rear wheel speed sensor (wss) (on left rear brake assembly, on back of hub) Low reference Right front wheel speed sensor (wss) (on right front brake assembly, on back of hub) Right rear wheel speed sensor (wss) (on right rear brake assembly, on back of hub) S115 (in engine harness, approximately 59 cm (24 in) from left front wheel speed sensor) S383 (w/o individual seat) Sensor signal Serial data Serial data (+) Serial data (-) Serial data wake up Supp volt Switch signal Tan Traction control off (w/o individual seat) Traction control switch W/ individual seat W/o individual seat
ANTI-THEFT Forced Entry Wiring Diagram for Buick Lucerne CXS 2007 List of elements for Forced Entry Wiring Diagram for Buick Lucerne CXS 2007: 68 (in body harness, approximately 9 cm (3 in) from branch for c314) s343 (under center of rear package shelf) remote control door lock receiver (rcdlr) (under left rear seat) g301 Battery Body control module (bcm) (right of glove box) Body harn mdl fuse f35 10a Computer data lines system Ddm fuse f24 15a Dr lck relay r9 Dr lock act ctrl Dr mdl/ pwr wndw circuit breaker cb3 25a Dr unlck relay r10 Dr unlock act ctrl Driver door latch assembly (rear of driver's door) Driver door module (ddm) Drv dr key sw sig Exterior lights system Front passenger door latch assembly (rear of front passenger's door) Front passenger door module (fpdm) G104 (right front corner of engine compt) G300 (under driver's seat) G301 (under left rear seat) G304 (under right front passenger's seat) G306 (at left "c" pillar) Gmlan serial data Ground Hood ajar sw sig Hood ajar switch (w/ remote keyless entry) (center front of engine compt) Hood closed sw sig Horn rly ctrl Horns system Hot at all times Ign Instrument panel cluster (ipc) Keyless entry antenna Keyless entry antenna sig Left rear door latch assembly (rear of left rear door) Lf dr ajar sw sig Lf dr open sw sig Lf dr sw low ref Logic Low spd gmlan ser data Lr dr ajar sw sig Lr dr lock mtr ctrl Lr dr open sw sig Nca Park lamp rly ctrl Pdm fuse f25 15a Rear dr lck fuse f19 20a Rear fuse block (below left side of rear seat) Rf dr ajar sw sig Rf dr open sw sig Rf dr sw low ref Right rear door latch assembly (rear of right rear door) Rr dr ajar sw sig Rr dr open mtr ctrl S301 S337 S385 S700 S800 Security ind Serial data Tan Tan/ red Tan/red W/ theft deterrent system W/o theft deterrent system Pass-Key Wiring Diagram for Buick Lucerne CXS 2007 List of elements for Pass-Key Wiring Diagram for Buick Lucerne CXS 2007: 25 Acc Acc volt Battery Computer data lines system G300 (under driver's seat) Ground Hot at all times I/p harn mdl fuse f31 10a Ign Ignition key Ignition switch Instrument panel cluster (ipc) Low spd gmlan ser data Off Power distribution system Reader/ exciter Rear fuse block (below left side of rear seat) Run S201 S204 Security ind Serial data Start Theft deterrent module (tdm) (in steering column) Transponder
BODY CONTROL MODULES Body Control Modules Wiring Diagram (1 of 3) for Buick Lucerne CXS 2007 List of elements for Body Control Modules Wiring Diagram (1 of 3) for Buick Lucerne CXS 2007: 48 12v reference Acc wakeup serial data Anti-lock brakes system Backlight lamp control Battery Battery current sensor Battery pos voltage Body control module (bcm) (right of glove box) Chmsl/ back-up fuse f18 10a Computer data lines system Cruise control system Cruise ctr ind dimming sig Door locks system Drl relay ctrl Exterior lights system Fog lamp relay ctrl Front fog lamp sw sig G303 (below right side of rear seat) G304 (under right front passenger's seat) Ground Headlamp high beam rly Headlights system Hi gmlan data bus (+) Hi gmlan data bus (-) Hi gmlan serial data up Hood ajar switch sig Hot at all times Interior lights system Led dimming signal Left lamp relay ctrl Low gmlan serial data Low reference Lt trn/ sig fuse f15 15a Out moisture sns sig 1 Out moisture sns sig 2 Pnk Power distribution system R lamp relay ctrl Rear fuse block (below left side of rear seat) Rf turn sig lamp sply Rr trn/ sig fuse f16 15a Run/crank ign 1 volt S206 Tan Tan/pnk Washer relay ctrl Wiper mtr park sw sig Wiper/washer system Body Control Modules Wiring Diagram (2 of 3) for Buick Lucerne CXS 2007 List of elements for Body Control Modules Wiring Diagram (2 of 3) for Buick Lucerne CXS 2007: 38 12v reference 5v ref Accessory volt Ambient light sns sig Anti-lock brakes system Battery pos voltage Body control module (bcm) (right of glove box) Column radio ctrl signal Courtesy lamp ctrl Courtesy lamp sw on sig Cruise control system Exterior lights system Flash to pass sw sig Ground Hazard sw sig Headlamp sw hi beam sig Headlamp sw off sig Headlights system Ignition 1 voltage Interior lights system Left turn sig sw sig Off/run crank voltage Park lamp sw on sig Pnk Power distribution system Remote radio ctrl acc Right turn sig sw sig Set/coast resume/accel Shift interlock system Shift select sw park sig Tan Track control sw sig Trunk release ctrl Trunk, tailgate, fuel doors system Washer sw sig Wiper sw high sig Wiper sw low sig Wiper/washer system Body Control Modules Wiring Diagram (3 of 3) for Buick Lucerne CXS 2007 List of elements for Body Control Modules Wiring Diagram (3 of 3) for Buick Lucerne CXS 2007: 48 Backlight lamp control Body control module (bcm) (right of glove box) Computer data lines system Courtesy lamp ctrl Current sensor sig Current sns sply volt Door locks system Exterior lights system Headlights system Hi speed relay ctrl Hood closed sw sig Horn relay ctrl Horns system Interior lights system Lamp rly coil sply volt Led dimming sig Lf turn sig sply volt Low beam relay ctrl Low gmlan serial data Lr door ajar sw sig Lr door lock motor ctrl Lr door open sw sig Lr stop/turn lamp sply Master sw lockout sig Master sw lr down sig Master sw lr up sig Master sw rr down sig Master sw rr lockout Master sw rr up sig Park brake switch (on top of park brake assembly) Park brake switch sig Park lamp relay control Power distribution system Power windows system Rap relay coil sply volt Rr door ajar sw sig Rr door lock motor ctrl Rr stop/turn lamp sply Run relay coil ctrl Sensor low reference Starting/charging system Stop lamp sw sig Tan Trunk ajar sw sig Trunk release relay ctrl Trunk, tailgate, fuel doors system Wiper relay control Wiper/washer system
COMPUTER DATA LINES Computer Data Lines Wiring Diagram (1 of 2) for Buick Lucerne CXS 2007 List of elements for Computer Data Lines Wiring Diagram (1 of 2) for Buick Lucerne CXS 2007: 31 (in engine harness, approximately 13 cm (5 in) from breakout for c138) s104 (left front of engine compartment, inside air cleaner housing) (left rear of engine compartment) (under center console) inflatable restraint sensing & diagnostic module (sdm) 3.8l 4.6l Acc wake up data Amplifier (mounted to left rear of rear seat) Automatic level control module (w/ soft ride suspension system) (forward of left rear tire, on lower control arm) electronic suspension control (esc) module (w/ magnetic ride control) (behind right wheelwell) D (not used) Digital radio receiver (drr) (at left "d" pillar) Electronic brake control module (ebcm) (left front corner of engine compt) Engine control module (ecm) (left side of engine compt) F (not used) Hi spd serial data + Hi spd serial data - J (not used) K (not used) Low spd serial data M (not used) Object alarm module (on right rear wheelwell) Powertrain control module (pcm) Remote control door lock receiver (rcdlr) (under center of rear package shelf) Serial data wake up Sp300 (in passenger compt under rear seat near rear fuse block) Tan Transmission control module (tcm) Underhood fuse block (on right front of engine compt, forward of strut tower) Vehicle communication interface module (vcim) (on right front of trunk, attached to seat back brace) W/ magnetic ride control W/ soft ride suspension system Computer Data Lines Wiring Diagram (2 of 2) for Buick Lucerne CXS 2007 List of elements for Computer Data Lines Wiring Diagram (2 of 2) for Buick Lucerne CXS 2007: 27 (in i/p harness, approximately 12 cm (5 in) from data link connector) s208 Body control module (bcm) (right of glove box) Data link connector (dlc) (under left side of dash) Driver door module (ddm) Front climate control seat module Front passenger door module (fpdm) G300 (under driver's seat) Hi spd serial data + Hi spd serial data - Hot at all times Hvac control module I/p harn mdl fuse 31 10a Inflatable restraint passenger presence system (pps) module (under front passenger's seat) Instrument panel cluster (ipc) Kw 2000 serial data Low spd serial data Memory seat module (msm) (on underside of driver's seat, on seat adjuster frame) Radio Rear fuse block (below left side of rear seat) Run/acc S200 S202 S203 S207 (in i/p harness, approximately 17 cm (7 in) from data link connector) Serial data wake up Tan Theft deterrent module (tdm) (in steering column)
COOLING FAN Cooling Fan Wiring Diagram for Buick Lucerne CXS 2007 List of elements for Cooling Fan Wiring Diagram for Buick Lucerne CXS 2007: 25 (or tan) 3.8l 4.6l Computer data lines system Cool/ fan 1 relay Cool/ fan 2 relay Cool/ fan relay Ect sens sig Engine coolant temperature (ect) sensor (3.8l: left rear of engine) (4.6l: right rear of engine) Fan 1 fuse 30a Fan 2 fuse 30a G104 (right front corner of engine compt) Gmlan serial data + Gmlan serial data - Hi speed rly ctrl Hot at all times Hot in run or start Left cooling fan (on left rear side of radiator) Low ref Low speed rly ctrl Pnk Powertrain control module (pcm) (3.8l) engine control module (ecm) (4.6l) (3.8l: left front of engine compt, inside air cleaner housing) (4.6l: left side of engine compt) Right cooling fan (on right rear side of radiator) Tan Underhood fuse block (on right front of engine compt, forward of strut tower)
CRUISE CONTROL Cruise Control Wiring Diagram for Buick Lucerne CXS 2007 List of elements for Cruise Control Wiring Diagram for Buick Lucerne CXS 2007: 75 (3.8l) (lower left rear of engine) g112 3.8l 4.6l 5 volt reference 5v ref 5v ref 2 Accelerator pedal position (app) sensor (top of accelerator pedal assembly) Alert distance cruise speed ltd follow distance set speed set xx mph tight curve App sensor 1 sig App sensor 2 sig Batt pos volt Body control module (bcm) (right of glove box) Brake pedal position sensor (top of brake pedal assembly) Clean radar cruise cruise disengage cruise not ready cruise set xx mph service radar cruise Computer data lines system Cruise ind Ecm/ tcm fuse 15a Engine control module (ecm) (4.6l) (left side of engine compt) Gmlan (ecm) Gmlan serial data Hot at all times Hot w/ run/crnk relay energized Hud message center Hvac fuse 10a Ign Ign 1 vol Ind dimming sig Inflatable restraint steering wheel module coil (top of steering column) Instrument panel cluster (ipc) Left steering wheel control switch Logic Low ref Low reference Lt trn/ sig fuse 15a Message center Message request Nca On ind Oss high sig Oss low sig Pnk Pnk/red Power distribution system Powertrain control module (pcm) (left front of engine compt, inside air cleaner housing) Rear fuse block (below left side of rear seat) Res + Res/acc sw sig S100 S105 S220 (in steering column harness, between cruise control on/off switch & inflatable restraint steering wheel module coil) Sens sig Serial data + Serial data - Serial data bus + Serial data bus - Serial data prim Serial data sec Serial data wake up Set - Sig gnd Sound systems Tac mot ctrl 1 Tac mot ctrl 2 Tan Throttle actuator control (tac) module (on throttle body assembly) Throttle body assembly Tp sensor 1 sig Tp sensor 2 sig Transmission control module (tcm) (4.6l) Underhood fuse block (on right front of engine compt, forward of strut tower) Vehicle speed sensor (vss) (in transmission) Vss Vss high sig Vss low sig
DEFOGGERS Defoggers Wiring Diagram for Buick Lucerne CXS 2007 List of elements for Defoggers Wiring Diagram for Buick Lucerne CXS 2007: 28 Computer data lines system Defogger ind Driver door module (ddm) Driver outside rearview mirror (in driver's door) Front passenger door module (fpdm) Front passenger outside rearview mirror (in front passenger's door) G300 (under driver's seat) G301 (under left rear seat) G304 (under right front passenger's seat) G306 (at left "c" pillar) G307 (at right "c" pillar) Ground Heated mirror element Hot at all times Hvac control module Logic Low reference Low spd gmlan serial data Nca Rear defog fuse jc2 40a Rear defog relay r14 Rear defog rly ctrl Rear defogger switch Rear fuse block (below left side of rear seat) Rear window defogger S385 Sply voltage Tan/pnk
ELECTRONIC POWER STEERING Electronic Power Steering Wiring Diagram for Buick Lucerne CXS 2007 List of elements for Electronic Power Steering Wiring Diagram for Buick Lucerne CXS 2007: 21 5v ref Abs 1 fuse 50a Abs 2 fuse 60a Battery Computer data lines system Electronic brake control module (ebcm) (left front corner of engine compt) G114 (lower left rear of engine) Ground High effort ctrl Hot at all times Low effort ctrl Low ref Pos sig a Pos sig b Red Serial data (+) Serial data (-) Steering angle sensor (w/ active brake control) (base of steering column) Tan Underhood fuse block (on right front of engine compt, forward of strut tower) Variable effort steering actuator (left rear of engine compt)
ELECTRONIC SUSPENSION Electronic Air Suspension Wiring Diagram for Buick Lucerne CXS 2007 List of elements for Electronic Air Suspension Wiring Diagram for Buick Lucerne CXS 2007: 58 (in body harness, approximately 65 cm (25 in) from right front strut actuator) (right front wall of luggage compt) Batt Battery voltage Computer data lines system Electronic level control circuit Electronic suspension control (esc) module (behind right wheelwell) G403 Gmlan ser data + Gmlan ser data - Ground Hot at all times I/p harn mdl fuse 31 10a Instrument panel cluster (ipc) Ipc class 2 Left front suspension damper (on left front shock absorber assembly) Left front suspension position sensor (on shock absorber assembly) Left rear suspension damper (on left rear shock absorber assembly) Left rear suspension position sensor (on left rear frame rail) Lf damper ctrl Lf damper low ref Lf position sens Lf snsr low ref Lf voltage ref Logic Lr damper ctrl Lr damper low ref Lr position sens Lr snsr low ref Lr voltage ref Message center Message request Mrtd mdl fuse 6 25a Nca Rear fuse block (below left side of rear seat) Relay ctrl Rf damper ctrl Rf damper low ref Rf position sens Rf snsr low ref Rf voltage ref Right front suspension damper (on right front shock absorber assembly) Right front suspension position sensor (on shock absorber assembly) Right rear suspension damper (on right rear shock absorber assembly) Right rear suspension position sensor (on right rear frame rail) Rr damper ctrl Rr damper low ref Rr position sens Rr snsr low ref Rr voltage ref S126 (in body harness, approximately 60 cm (24 in) from left front strut actuator) S127 (in body harness, approximately 65 cm (25 in) from left front strut actuator) S129 S200 Serial data Service suspen sys Solenoid ctrl Tan Electronic Level Control Wiring Diagram, with Electronic Suspension for Buick Lucerne CXS 2007 List of elements for Electronic Level Control Wiring Diagram, with Electronic Suspension for Buick Lucerne CXS 2007: 32 (right front wall of luggage compt) g403 Automatic level control (alc) compressor (rear underside of vehicle) Batt Batt positive Comprsr Computer data lines system Elc Elc comprsr fuse jc3 30a Elc mdl fuse 7 10a Electronic suspension control (esc) module (behind right wheelwell) G403 (right front wall of luggage compt) Gnd Hot at all times I/p harn mdl fuse 31 10a Instrument panel cluster (ipc) Ipc class 2 Logic Message center Message request Mrtd mdl fuse 6 25a Nca Rear fuse block (below left side of rear seat) Relay 15 Relay ctrl S200 S317 Serial data Serial data + Serial data - Service suspen sys Solenoid ctrl Tan Electronic Level Control Wiring Diagram, without Electronic Suspension for Buick Lucerne CXS 2007 List of elements for Electronic Level Control Wiring Diagram, without Electronic Suspension for Buick Lucerne CXS 2007: 32 (in front of left rear tire, on lower control arm) (left rear of luggage compt) g402 (right front wall of luggage compt) g403 Automatic level control (alc) compressor (rear underside of vehicle) Automatic level control module Batt Batt positive Comprsr Computer data lines system Elc Elc comprsr fuse jc3 30a Elc mdl fuse 7 10a Gnd Hot at all times I/p harn mdl fuse 31 10a Instrument panel cluster (ipc) Ipc class 2 Logic Message center Message request Nca Rear fuse block (below left side of rear seat) Relay 15 Relay ctrl S200 S317 Serial data Serial data + Serial data - Service suspen sys Solenoid ctrl Tan
ENGINE PERFORMANCE
3.8L VIN 2 3.8L VIN 2, Engine Performance Wiring Diagram (1 of 5) for Buick Lucerne CXS 2007 List of elements for 3.8L VIN 2, Engine Performance Wiring Diagram (1 of 5) for Buick Lucerne CXS 2007: 58 signal ground (1 in) from branch for c139) (in engine harness, approximately 3 cm (left side of oil pan) (lower left rear of engine) (on left side of engine, near starter) (on top front of engine) (on top right rear of engine) (pins 62-72 not used) 5 volt ref 1 5 volt ref 2 Camshaft sig Ect sensor sig Egr pos sig Egr sol high Egr sol low Engine coolant temperature sensor (left rear of engine) Engine oil level switch Engine oil pressure switch Evap purge sol Evaporative emission (evap) canister purge solenoid valve (on top right rear of engine) Exhaust gas recirculation valve Fuel inj 1 ctrl Fuel inj 2 ctrl Fuel inj 3 ctrl Fuel inj 4 ctrl Fuel inj 5 ctrl Fuel inj 6 ctrl Fuel injectors (1, 3 & 5: top left side of engine) (2, 4 & 6: top right side of engine) G112 G112 (lower left rear of engine) Gen field Gen on sig Heated oxygen sensor (ho2s) 1 (on right exhaust manifold) Ho2s heater 1 Ho2s low ref Ho2s ref volt Ic timing ctrl Ic timing sig Knock sensor 1 Knock sensor 2 Knock sensor 2 (on right side of engine, below exhaust manifold) Low eng speed Low ref Manifold absolute pressure sensor Map sensor sig Med eng speed Nca Oil level sw Oil press sig Pnk Powertrain control module (left front of engine compt, inside air cleaner housing) Relay control S109 Starting/charging system Tan Tan/pnk Uart data 3.8L VIN 2, Engine Performance Wiring Diagram (2 of 5) for Buick Lucerne CXS 2007 List of elements for 3.8L VIN 2, Engine Performance Wiring Diagram (2 of 5) for Buick Lucerne CXS 2007: 47 (lower left rear of engine) (not used) (on left front of engine, next to crankshaft balancer) crankshaft position sensor (on right front of engine) 12-volt ref 5 volt ref Aap sensor 1 Accelerator pedal position sensor (top of accelerator pedal assembly) App sensor 2 Body control module (right of glove box) C110 Camshaft position sensor Ckp sen 1 sig Ckp sen 2 sig Cmp sens sig Cmp sig Firing order 1-6-5-4-3-2 G112 G115 (lower left rear of engine) Gnd Ground Hall effect sensor Hot in run or start Ic timing ctrl Ic timing sig Ign 1 volt Ignition coils Ignition control module (icm) (at left front of engine, under ignition coils) Inj/coil fuse f24 15a Inj/coil fuse f25 15a Low ref Low speed sig Medium speed sig P pnk Pnk Primary uart S145 S164 Sec uart Spark plugs Stop lamp Stop lamp switch signal Throttle actuator control module (on throttle body assembly) Trans ign 3 fuse f6 10a Underhood fuse block (on right front of engine compt, forward of strut tower) Vehicle spd Volt ign 1 3.8L VIN 2, Engine Performance Wiring Diagram (3 of 5) for Buick Lucerne CXS 2007 List of elements for 3.8L VIN 2, Engine Performance Wiring Diagram (3 of 5) for Buick Lucerne CXS 2007: 49 (not used) 1-2 shift solenoid valve 2-3 shift solenoid valve A red A/t fluid temperature sensor valve A/t input shaft speed sensor At iss low sig Automatic transmission Automatic transmission fluid pressure (tfp) manual valve position switch Code a Code b Code c G112 (lower left rear of engine) Ho2s 2 sig high Ho2s 2 sig low Ho2s heater 2 Iat sensor sig Interlock system Lockout Lockout sol ctrl Low ref Maf sensor sig P/n Parity Pc sol hi ctrl Pnk Powertrain control module (left front of engine compt, inside air cleaner housing) Pre sen sig Pressure control solenoid valve Red S115 (approximately 59 cm (24 in) from left front wheel speed sensor) red Shift Shift sol Sol low ctrl Tan Tan/pnk Tcc release switch Tcc sol Tcc sw sig Tft sensor sig Torque converter clutch solenoid valve Tr sig a Tr sig b Tr sig c Tr sig p Transmission internal mode switch Vehicle speed sensor (in transmission) Vss sig high Vss sig low 3.8L VIN 2, Engine Performance Wiring Diagram (4 of 5) for Buick Lucerne CXS 2007 List of elements for 3.8L VIN 2, Engine Performance Wiring Diagram (4 of 5) for Buick Lucerne CXS 2007: 39 (lower left rear of engine) g112 (lower left rear of engine) g114 (under vehicle, after catalytic converter) Air pump fuse jc8 50a Air pump relay r9 Air temperature sensor (left side of engine Air/ sol relay r12 Air/sol fuse f27 15a Compartment, in air intake tube) Crnk relay r3 Ecm ign 3 fuse f5 10a Ecm/crnk fuse f23 15a G112 (lower left rear of engine) Gnd Heated oxygen sensor (ho2s) 2 Hot at all times Hot in run & start Hot in run or start Iat sens sig Low ref Mass air flow/intake Nca Oxy pst fuse f21 15a Pnk Pwr trn fuse f22 15a Pwr/train relay r4 Red Relay r6 Rly ctrl Run/ crank S101 S108 Secondary air injection (air) check valve (w/ california pzev emission system) Secondary air injection (air) pump (w/ california pzev emission system) Sens sig maf Tan Tan d Tan/pnk Underhood fuse block (on right front of engine compt, forward of strut tower) 3.8L VIN 2, Engine Performance Wiring Diagram (5 of 5) for Buick Lucerne CXS 2007 List of elements for 3.8L VIN 2, Engine Performance Wiring Diagram (5 of 5) for Buick Lucerne CXS 2007: 57 (approximately 5 cm (2 in) from breakout for electronic suspension control module) s316 (below rear of vehicle, on evap canister) (right front wall of luggage compartment) g403 (under left rear seat) 5 volt ref 1 A/c clutch relay A/c press sig A/c refrigerant pressure sensor (near a/c compressor, on hose assembly) Acc Air conditioning system Battery Body control module (right of glove box) Cnstr vent fuse f5 10a Computer data lines system Cooling fans system Ecm/tcm fuse f28 15a Evap vent sol Evaporative emissions (evap) canister vent solenoid valve Fuel level sig Fuel pump & sender assembly Fuel pump relay Fuel tank press Fuel tank pressure sensor Fuel/ pump relay r7 G300 (under driver's seat) G301 Gnd High fan Hot at all times Ign Ignition 1 Ignition switch Instrument panel cluster Logic Low fan Low ref Malfunction indicator lamp (mil) Mil control Off Pnk Powertrain control module (left front of engine compt, inside air cleaner housing) Rear fuse block (below left side Relay control Relay ctrl Run S201 S203 Ser data bus + Ser data bus - Side of rear seat) Start Starter enable Starting/charging system Stop lamp sw Tan Vehicle speed sig Wakeup data
4.6L VIN Y 4.6L VIN Y, Engine Performance Wiring Diagram (1 of 5) for Buick Lucerne CXS 2007 List of elements for 4.6L VIN Y, Engine Performance Wiring Diagram (1 of 5) for Buick Lucerne CXS 2007: 55 (left rear of engine compartment) transmission control module (tcm) (lower left rear of engine) g112 (right of glove box) body control module (bcm) (under driver's seat) g300 5v ref 1 5v ref 2 A/c com clutch rly Accelerator pedal position (app) sensor (top of accelerator pedal assembly) Accessory wake up Air conditioning system App sensor 1 sig App sensor 2 sig Battery pos volt Cooling fans system Ecm ign 3 fuse f5 10a Ecm/crnk fuse f23 15a Engine control module (ecm) (left side of engine compartment) Engine oil pressure (eop) switch (near oil filter) Evap canister vent Exterior lights system Fan relay ctrl Fuel pump rly ctrl Fuel tank pressure (ftp) sensor (on top of fuel tank) G112 (lower left rear of engine) Gnd Hot at all times Hot in run or start Ign Ignition 1 voltage Instrument panel cluster (ipc) Logic Low reference Malfunction indicator lamp (mil) Mil control Oss hi sig Oss low sig Oxy pst fuse f21 10a Pnk Pressure sns sig Primary fuel level Pwr/train relay Pwr/train relay r4 Rly ctrl Run/crnk relay r6 S104 (approximately 13 cm (5 in) from breakout to c138) S105 S203 Serial data acc wake up Starter rly coil Starting/ charging system Stop lamp sw sig Tan To fuse pwr trn fuse f22 (diagram 4 of 5) Underhood fuse block (on right front of engine compartment, forward of strut tower) Vehicle speed sensor (vss) (in transmission) 4.6L VIN Y, Engine Performance Wiring Diagram (2 of 5) for Buick Lucerne CXS 2007 List of elements for 4.6L VIN Y, Engine Performance Wiring Diagram (2 of 5) for Buick Lucerne CXS 2007: 41 (below rear of vehicle, on evap canister) evaporative emission (evap) canister vent solenoid valve (near a/c compressor, on hose assembly) (top of fuel tank) fuel pump & sender assembly (under left rear seat) 5v ref 1 5v ref 2 A/c refrigerant pressure sensor Acc Air pump relay ctrl Cnstr vent fuse f5 10a Cooling fans system Ctrl bank 2 sns 1 Ecm/tcm fuse f28 15a Engine control module (ecm) (left side of engine compartment) Evap canister purge Field duty cycle sig Fuel pump fuse f11 20a Fuel/ pump relay r7 G301 G403 (right front wall of luggage compartment) Hot at all times Ignition switch Low reference Low speed cooling Off Park/neutral Pnk Rear fuse block (below left side of rear seat) Ref bank 2 sns 1 Reverse lockout sol Run S100 S201 S316 (in body harness, approximately 5 cm (2 in) from breakout for electronic suspension control module) Serial data bus - Start Starting/ charging system Tan Transmissions system Turn on signal Volt bank 2 sns 1 4.6L VIN Y, Engine Performance Wiring Diagram (3 of 5) for Buick Lucerne CXS 2007 List of elements for 4.6L VIN Y, Engine Performance Wiring Diagram (3 of 5) for Buick Lucerne CXS 2007: 27 (lower left front corner of engine compartment) secondary air injection (air) pump (lower left rear of engine) (on top right rear of engine) evaporative emission (evap) canister purge solenoid valve (top center of rear camshaft cover) secondary air injection (air) check valve Air pump fuse jc8 50a Air pump relay r9 Air/ sol relay r12 Air/sol fuse f27 15a Computer data lines system Ect sensor sig Engine control module (ecm) (left side of engine compartment) Engine coolant temperature (ect) sensor (right rear of engine) G115 Heated oxygen sensor (ho2s) bank 2 sensor 1 (in left exhaust manifold) Hot at all times Hot in run or start Manifold absolute pressure (map) sensor (on top rear of engine) Map sensor sig Nca Oil pre sw signal Pnk Pre sns sig Refrig pre sen sig S106 Serial data bus + Tan Underhood fuse block (on right front of engine compartment, forward of strut tower) 4.6L VIN Y, Engine Performance Wiring Diagram (4 of 5) for Buick Lucerne CXS 2007 List of elements for 4.6L VIN Y, Engine Performance Wiring Diagram (4 of 5) for Buick Lucerne CXS 2007: 48 (below exhaust gas recirculation (egr) valve) (in engine harness, (in engine harness, approximately 3 cm (1 in) from branch for c139) s109 (in engine harness, approximately 7 cm (4 in) from branch for c139 toward breakout for c138) s102 (in even bank ignition coil harness, between c139 & ignition coil/module 8) s135 (in even bank ignition coil harness, pnk (in odd bank ignition coil harness, between c140 & ignition coil/module 7) s142 (in odd bank ignition coil harness, between c140 & ignition tan (on right front of engine compartment, forward of strut tower) (on top right rear of engine) exhaust gas recirculation (egr) valve (top left side of engine) (top right side of engine) Approximately 6 cm (2 in) from branch for engine coolant temperature (ect) sensor) Between c139 & ignition coil/module 8) s131 Coil/module 7) s146 Ctrl From ecm/crnk fuse f23 (diagram 1 of 5) Fuel injectors (top left side of engine) Fuel injectors (top right side of engine) G100 Gnd Ign Ignition coil/module 1 Ignition coil/module 2 Ignition coil/module 3 Ignition coil/module 4 Ignition coil/module 5 Ignition coil/module 6 Ignition coil/module 7 Ignition coil/module 8 Inj/coil fuse f24 15a c3 Inj/coil fuse f25 15a Low Nca Plug spark Pnk Pnk/tan Pwr trn fuse f22 15a Red Red b S110 S133 S144 Spark plug Tan Tan c Underhood fuse block 4.6L VIN Y, Engine Performance Wiring Diagram (5 of 5) for Buick Lucerne CXS 2007 List of elements for 4.6L VIN Y, Engine Performance Wiring Diagram (5 of 5) for Buick Lucerne CXS 2007: 58 (left side of engine compartment, in air intake tube) 5v ref 1 5v ref 2 Camshaft position (cmp) sensor (on right front of engine) Ckp sensor sig Cmp sensor sig Crankshaft position (ckp) sensor (top center of engine) Egr sol high ctrl Egr sol low ctrl Egr valve pos sig Engine control module (ecm) (left side of engine compartment) Fuel injector 1 Fuel injector 2 Fuel injector 3 Fuel injector 4 Fuel injector 5 Fuel injector 6 Fuel injector 7 Fuel injector 8 G112 (lower left rear of engine) Heated oxygen sensor (ho2s) 2 (in exhaust, after catalytic converter) Heated oxygen sensor (ho2s) bank 1 sensor 1 (on right exhaust manifold) Heater low ctrl Ho2s 2 high sig Ho2s 2 low sig Iat sensor sig Ic 1 control Ic 2 ctrl Ic 3 control Ic 4 control Ic 5 ctrl Ic 6 ctrl Ic 7 ctrl Ic 8 control Ignition 1 voltage Knock sensor (ks) 1 (top right side of engine) Knock sensor (ks) 2 (top left side of engine) Knock sns 1 sig Knock sns 2 sig Low ref Low reference Maf sensor sig Mass air flow (maf)/ intake air temperature (iat) sensor Nca Pnk Pnk/red Pnk/tan Ref bank 1 sen 1 S105 Signal ground Tac motor ctrl 1 Tac motor ctrl 2 Tan Tan/pnk Throttle body assembly Tp sensor 1 sig Tp sensor 2 sig Volt bank 1 sns 1
EXTERIOR LIGHTS Exterior Lamps Wiring Diagram (1 of 2) for Buick Lucerne CXS 2007 List of elements for Exterior Lamps Wiring Diagram (1 of 2) for Buick Lucerne CXS 2007: 58 3.8l 4.6l Auto Backup lamp circuit Batt pos volt Body control module (bcm) (right of glove box) Center high mounted stop lamp (chmsl) Chmsl sply volt Driver outside rear view mirror (in driver's door) Engine control module (pcm) (left side of engine compt) Front passenger outside rear view mirror (in front passenger's door) G300 (under driver's seat) G301 (under left rear seat) G304 (under right front passenger's seat) G403 (right front wall of luggage compt) Hazard sw sig Hazard switch Head Headlamp switch Hot at all times If equipped Interior lights system Left auxi- liary tail lamp Left auxiliary tail lamp assembly Left corn lmp rly ctrl Left turn Left turn sw sig Lf turn Lf turn sig lmp sply Logic Lr stop/turn lmp sply Lt crn lamp fuse f19 10a Off Park Powertrain control module (pcm) (left front of engine compt, inside air cleaner housing) Prk lmp rly ctrl Prk lmp sw on sig Rf turn Rf turn sig lmp sply Right auxi- liary tail lamp Right auxiliary tail lamp assembly Right backup lamp Right corn lmp rly ctrl Right turn Right turn sw sig Rr stop/turn lmp sply Rt crn lamp fuse f20 10a S202 S204 S206 Sig lmp c1 sply volt Stop lmp sw sig Tan Throttle actuator control (tac) module (on throttle body assembly) Transmission control module (tcm) (left rear of engine compt) Trn/sig pcb relay Turn/signal multifunction switch Underhood fuse block (on right front of engine compt, forward of strut tower) Exterior Lamps Wiring Diagram (2 of 2) for Buick Lucerne CXS 2007 List of elements for Exterior Lamps Wiring Diagram (2 of 2) for Buick Lucerne CXS 2007: 34 Chmsl/ bck-up fuse f18 10a G104 (right front corner of engine compt) G402 (left rear of luggage compt) G403 (right front wall of luggage compt) Hot at all times Left front cornering lamp Left front headlamp assembly Left front marker lamp Left front park/ turn signal lamp Left rear marker lamp Left stop/tail/turn signal lamp Left tail lamp assembly License lamp Lt prk lamp fuse f42 10a Lt trn/ sig fuse f15 15a Prk lamp relay r2 Rear fuse block (below left side of rear seat) Right front cornering lamp Right front headlamp assembly Right front marker lamp Right front park/ turn signal lamp Right rear marker lamp Right stop/tail/turn signal lamp Right tail lamp assembly Rr trn/ sig fuse f16 15a Rt prk lamp fuse f43 10a S323 (in body harness, approximately 15 cm (6 in) from branch for rear fuse block) S324 (in body harness, approximately 5 cm (2 in) from breakout for right inflatable restraint roof rail module) S326 S402 S404 (in rear fascia harness, approximately 13 cm (5 in) from breakout for license lamps) Tan Trailer stop/turn Underhood fuse block (on right front of engine compt, forward of strut tower)
3.8L VIN 2 3.8L VIN 2, Back-up Lamps Wiring Diagram for Buick Lucerne CXS 2007 List of elements for 3.8L VIN 2, Back-up Lamps Wiring Diagram for Buick Lucerne CXS 2007: 28 (in body harness, approximately 7 cm (3 in) from breakout for battery current sensor) s325 (lower left rear of engine) g112 Automatic transmission Backup Backup lmp sply Batt pos volt Body control module (bcm) (right of glove box) Bus + Bus - Chmsl/ bck-up fuse f18 10a Code a Code b Computer data lines system G403 (right front wall of luggage compt) Hot at all times Inside rear view mirror Left auxiliary tail lamp assembly Left backup lamp Lmp sply volt Logic Powertrain control module (left front of engine compt, inside air cleaner housing) Rear fuse block (below left side of rear seat) Right auxiliary tail lamp assembly Right backup lamp Sig a Sig b Tan Transmission internal mode switch
4.6L VIN Y 4.6L VIN Y, Back-up Lamps Wiring Diagram for Buick Lucerne CXS 2007 List of elements for 4.6L VIN Y, Back-up Lamps Wiring Diagram for Buick Lucerne CXS 2007: 28 (in body harness, approximately 7 cm (3 in) from breakout for battery current sensor) s325 (lower left rear of engine) g112 Automatic transmission Backup Backup lmp sply Batt pos volt Body control module (bcm) (right of glove box) Bus + Bus - Chmsl/ bck-up fuse f18 10a Computer data lines system G403 (right front wall of luggage compt) Hot at all times Inside rear view mirror Left auxiliary tail lamp assembly Left backup lamp Lmp sply volt Logic Nca Rear fuse block (below left side of rear seat) Right auxiliary tail lamp assembly Right backup lamp S105 Sig a Sig b Tan Transmission control module (left rear of engine compt) Transmission internal mode switch
GROUND DISTRIBUTION Ground Distribution Wiring Diagram (1 of 4) for Buick Lucerne CXS 2007 List of elements for Ground Distribution Wiring Diagram (1 of 4) for Buick Lucerne CXS 2007: 58 (3.8l) ignition control module (icm) (4.6l) a/c compressor clutch (4.6l) secondary air injection (air) check valve (4.6l) secondary air injection (air) pump (if equipped) sunroof control module (on right front of engine compartment, forward of strut tower) underhood fuse block (w/ magnetic ride control) electronic suspension control (esc) module 14 cm (6 in) from branch for throttle body assembly) 3.8l & pzev 4.6l A c2 Automatic level control (alc) compressor Automatic transmission B c1 Battery Battery current sensor Body control module (bcm) Crnk relay 3 Electronic brake control module (ebcm) Engine control module (ecm) Engine oil pressure (eop) switch Fuel pump & sender assembly G100 (4.6l) (below exhaust gas recirculation (egr) valve) G101 (left front corner of engine compartment) G112 (except 3.8l) (lower left rear of engine) G114 (lower left rear of engine) G115 (lower left rear of engine) G302 (under right front passenger's seat) G303 (below right side of rear seat) G306 (at left "c" pillar) G307 (at right "c" pillar) G403 (right front wall of luggage compartment) Ignition coil/ module 1 Ignition coil/ module 2 Ignition coil/ module 3 Ignition coil/ module 4 Ignition coil/ module 5 Ignition coil/ module 6 Ignition coil/ module 7 Ignition coil/ module 8 Inflatable restraint sensing & diagnostic module (sdm) Keyless entry antenna Left auxiliary tail lamp assembly License lamp Mass air flow (maf)/ intake air temperature (iat) sensor Nca Rear window defogger Right auxiliary tail lamp assembly Right tail lamp assembly Run/ crnk relay 6 S106 (in engine harness, approximately 7 cm (3 in) from branch for throttle body assembly) S108 (in engine harness, approximately 10 cm (4 in) from breakout for automatic transmission) S133 (in even bank ignition coil harness, between c139 & ignition coil/module 2) S144 S385 (in body harness, approximately 10 cm (4 in) from g306) S402 (in rear fascia harness, approximately 7 cm (3 in) from breakout for license lamps) Transmission control module (tcm) Windshield wiper motor Ground Distribution Wiring Diagram (2 of 4) for Buick Lucerne CXS 2007 List of elements for Ground Distribution Wiring Diagram (2 of 4) for Buick Lucerne CXS 2007: 48 (on right front of engine compartment, forward of strut tower) underhood fuse block (pzev) secondary air injection (air) check valve (to passenger seat adjuster switch diagram 3 of 4) (w/ keyless entry start/ extended range) hood ajar switch 12 cm (5 in) from breakout for c800) A/c compressor clutch Approximately 6 cm (2 in) from breakout for a/t shift lock control solenoid) Automatic transmission Auxiliary power outlet console Blower motor control module Body control module (bcm) C1 c C2 d Cigar lighter Cool/fan relay 2 Engine oil level switch Engine oil pressure (eop) switch Floor shifter assembly For i/p compartment lamp) Front passenger door module (fpdm) G104 (right front corner of engine compartment) G112 (3.8l) (lower left rear of engine) G304 (under right front passenger's seat) Headlamp switch Horn assembly I/p compartment lamp Left front fog lamp Left front headlamp assembly Mass air flow (maf)/ intake air temperature (iat) sensor Nca Powertrain control module (pcm) Reverse lockout solenoid Right cooling fan Right front door courtesy lamp Right front fog lamp Right front headlamp assembly Right rear door latch assembly Right rear door window switch Run/ crnk relay 6 S383 (in center console harness, between breakout for a/t shift lock control solenoid & breakout for auxiliary hvac control module) S387 Throttle actuator control (tac) module Traction control switch W/ custom bucket seat Windshield washer fluid level switch Windshield washer fluid pump Windshield washer solvent heater Wpr relay 8 Ground Distribution Wiring Diagram (3 of 4) for Buick Lucerne CXS 2007 List of elements for Ground Distribution Wiring Diagram (3 of 4) for Buick Lucerne CXS 2007: 47 (from splice s387 diagram 2 of 4) (w/ custom bucket seat) ignition lock cylinder solenoid (w/ front cooling heater) front climate control seat module (w/o custom bucket seat) shift lock control column shifter solenoid (w/o custom bucket seat) traction control switch Approximately 8 cm (4 in) from breakout for inflatable restraint seat position sensor) Ashtray lamp Brake fluid level switch C2 d C205 & turn signal/multifunction switch connector c4) Data link connector (dlc) Driver door module (ddm) Driver information display switch Driver seat adjuster switch Front auxiliary power outlet Front cigar lighter G300 (under driver's seat) Hazard switch Heated steering wheel control module Horn switch Hvac control module Inflatable restraint passenger presence system (pps) module Inflatable restraint steering wheel module coil Inside air tempe- rature sensor Instrument panel cluster Instrument panel cluster (ipc) Left front door courtesy lamp Left steering wheel control switch Lighter) Memory seat module (msm) Nca Passenger lumbar adjuster switch Passenger seat adjuster switch Rear compartment lid release switch Restraint steering wheel module coil) Right steering wheel control switch S203 (in i/p harness, approximately 36 cm (14 in) from breakout for hvac module) S306 (in right front seat harness, approximately 7 cm (3 in) from breakout for passenger seat belt switch) Sunload twilight sensor Theft deterrent module (tdm) Turn signal/ multifunction switch W/ 8-way passenger seat adjuster W/ automatic auxiliary temperature W/ heated nozzles W/o 8-way passenger seat adjuster W/o automatic auxiliary temperature W/o custom bucket seat Ground Distribution Wiring Diagram (4 of 4) for Buick Lucerne CXS 2007 List of elements for Ground Distribution Wiring Diagram (4 of 4) for Buick Lucerne CXS 2007: 40 (below left side of rear seat) rear fuse block (if equipped) object alarm module (if equipped) outside moisture sensor (w/ digital audio system s-band) digital radio receiver (drr) (w/ onstar) vehicle communication interface module (w/ suspension system) automatic level control module Amplifier Amplifier connector c1) Center high mounted stop lamp (chmsl) Dr lck relay 9 Dr unlck relay 10 Fuel/ pump relay 7 G110 (ground strap to generator) G111 (in engine compartment, ground strap to right frame rail) G301 (under left rear seat) G305 (under driver's seat) G402 (left rear of luggage compartment) Garage door opener transmitter Inflatable restraint i/p module indicator Inside rearview mirror Left front vanity mirror lamp Left rear door latch assembly Left rear door window switch Left roof rail reading lamp Left tail lamp assembly Nca Overhead console lamp Radio Rap relay 1 Rear compartment lid latch Rear defog relay 14 Remote control door lock receiver (rcdlr) Right front vanity mirror lamp Right roof rail reading lamp Run relay 3 S312 (in headliner harness, approximately 10 cm (4 in) from branch for c321) S313 Sunroof switch Trunk relse relay 6 W/ premium audio branded & amplifier
HEADLIGHTS Headlights Wiring Diagram for Buick Lucerne CXS 2007 List of elements for Headlights Wiring Diagram for Buick Lucerne CXS 2007: 66 Body control module (bcm) (right of glove box) C (not used) Class 2 serial data Computer data lines system Data serial Drl fuse f30 15a Drl relay 4 Drl rly ctrl Exterior lights system Flash to pass sw sig Fog fuse 16 15a Fog lamp pcb relay Fog lamps ind Front fog lamp switch Frt fog lamp rly ctrl Frt fog lamp sw sig Ftp G104 (right front corner of engine compt) G300 (under driver's seat) G304 (under right front passenger's seat) Gmlan (bcm) Head Headlamp sw off sig Headlamp sw on sig Headlamp switch Hi beam fuse f10 10a Hi beam fuse f11 10a High High beam ind High beam pcb relay High beam rly ctrl Highbeam signal Hot at all times Hvac control module Ign Instrument panel cluster (ipc) Left front fog lamp Left front headlamp assembly Left high beam headlamp Left low beam headlamp Light sensor sig Lo beam pcb relay Logic Low Low beam rly ctrl Lt lo beam fuse f2 20a Off Park auto Park lamp relay ctrl Park lamp sw on sig Rear fuse block (below left side of rear seat) Right front fog lamp Right front headlamp assembly Right high beam headlamp Right low beam headlamp Rt lo beam fuse f3 20a S124 (in forward lamp harness, approximately 26 cm (11 in) from c114) S203 S204 S206 Serial data Sunload twilight sensor (top center of dash) Turn signal/ multifunction switch Underhood fuse block (on right front of engine compartment, forward of strut tower) W/ automatic a/c W/ manual a/c
HORN Horn Wiring Diagram for Buick Lucerne CXS 2007 List of elements for Horn Wiring Diagram for Buick Lucerne CXS 2007: 17 (right front corner of engine compartment) g104 Body control module (bcm) (right of glove box) G300 (under driver's seat) High note horn Horn assembly (left front of engine compartment) Horn fuse f17 15a Horn pcb relay Horn rly ctrl Horn switch Hot at all times Inflatable restraint steering wheel module coil (top of steering column) Low note horn Nca S219 S377 (in body harness, approximately 15 cm (6 in) from breakout for c206) Tan Underhood fuse block (on right front of engine compartment, forward of strut tower)
INSTRUMENT CLUSTER Instrument Cluster Wiring Diagram (1 of 2) for Buick Lucerne CXS 2007 List of elements for Instrument Cluster Wiring Diagram (1 of 2) for Buick Lucerne CXS 2007: 68 Abs ind Air bag ind Audible alarm Backlighting ctrl Backlighting ind Batt pos volt Brake ind Charging ind Cruise ind Drv info center select menu sw sig Drv info center sw low ref Drv info center sw sig Engine controls system Engine coolant temperature ind Fog lamps ind Fuel level gage G300 (under driver's seat) Gmlan Gmlan (bcm) Gmlan (ebcm) Gmlan (ecm) Gmlan (sdm) Gnd Ground High beam ind Hot at all times Hot w/ run/crnk relay energized Hvac fuse f14 10a I/p harn mdl fuse f31 10a Ign Ign 1 volt Instrument panel cluster (ipc) Interior lights system Ipc Left turn ind Logic Low spd gmlan serial data Low tire pressure ind Low washer fluid ind ctrl Malfunction ind Message center Off ind ctrl Oil level ind Pass air bag Pass air bag on ind ctrl Pass seat belt ind Pnk Pnk/tan Power distribution system Rear fuse block (below left side of rear seat) Right turn ind S200 S202 S203 Seat belt ind Security ind Speedometer (mph/km/h) Tachometer Tan Temperature gage Trip reset Trip reset sw sig Trip/ odometer Trip/odometer ctrl Underhood fuse block (on right front of engine compt, forward of strut tower) Vse ind Washer fluid heat ctrl sw volt Wiper/washer system Instrument Cluster Wiring Diagram (2 of 2) for Buick Lucerne CXS 2007 List of elements for Instrument Cluster Wiring Diagram (2 of 2) for Buick Lucerne CXS 2007: 33 3.8l 4.6l Body control module (bcm) (right of glove box) Brake fluid level switch (on master cylinder reservoir) Computer data lines system Driver information display switch Engine control module (ecm) (4.6l) powertrain control module (ecm) (3.8l) (4.6l: left side of engine compt) (3.8l: left front of engine compt, inside air cleaner housing) Engine controls system Engine oil level switch (left side of oil pan) Engine oil pressure (eop) switch (near oil filter) Fuel level sens sig Fuel pump & sender assembly (top of fuel tank) G112 (lower left rear of engine) G300 (under driver's seat) Gmlan serial data+ Gmlan serial data- Interior lights system Logic Low ref Low spd gmlan serial data Oil level sw sig Oil press sw sig Park brake sw sig Park brake switch (on top of park brake assembly) Persona- lization Pnk S105 (4.6l) S202 S316 (in body harness, approximately 5 cm (2 in) from breakout for electronic suspension control module) Set/ reset Tan Trip/ fuel Vehicle information
INTERIOR LIGHTS Courtesy Lamps Wiring Diagram for Buick Lucerne CXS 2007 List of elements for Courtesy Lamps Wiring Diagram for Buick Lucerne CXS 2007: 54 (in body harness, approximately 14 cm (6 in) from breakout for c325) s329 (in body harness, approximately 5 cm (2 in) from breakout for audio amplifier connector c1) s372 (left rear of luggage compartment) (under right front passenger's seat) 12 volt ref Batt pos volt Body control module (bcm) (right of glove box) Computer data lines system Court lamp ctrl Ctsy/ rf trn fuse f4 10a Driver door latch assembly (rear of driver's door) Driver door module (ddm) Front passenger door latch assembly (rear of front passenger's door) Front passenger door module (fpdm) G300 (under driver's seat) G301 (under left rear seat) G304 G304 (under right front passenger's seat) G402 G402 (left rear of luggage compartment) Hot at all times I/p compartment lamp Int lamps fuse f3 10a Left front door courtesy lamp Left front vanity mirror lamp Left rear door latch assembly (rear of left rear door) Left roof rail reading lamp Low ref Low speed gmlan serial data Lr door open sw sig Off Open sw sig Overhead console lamp Rear compartment courtesy lamp Rear compartment lid latch (center rear of luggage compartment) Rear fuse block (below left side of rear seat) Right front door courtesy lamp Right front vanity mirror lamp Right rear door latch assembly (rear of right rear door) Right roof rail reading lamp S202 S206 S211 (in i/p harness, approximately 28 cm (11 in) from breakout for body control module connector) S313 S328 (in headliner harness, approximately 20 cm (8 in) from branch for c321) S331 (in ip harness, between body control module & front door courtesy lamps) S343 (in body harness, approximately 9 cm (3 in) from branch for c314) S700 S800 Tan/ pnk Tan/pnk Trunk lmp ctrl W/ theft deterrent system W/o theft deterrent system Instrument Illumination Wiring Diagram for Buick Lucerne CXS 2007 List of elements for Instrument Illumination Wiring Diagram for Buick Lucerne CXS 2007: 57 (in i/p harness, approximately 21 cm (8 in) from branch for hazard lamp switch toward branch for hvac module) s212 (under 12 volt ref Ashtray lamp Automatic transmission Backlight lamp ctrl Backlighting (8 bulbs) Backlighting control Batt pos volt Body control module (bcm) (right of glove box) Court lamp sw on sig D c2 Dm switch fuse f10 10a Driver information display switch Driver's seat) G300 G300 (under driver's seat) G301 (under left rear seat) G304 (under right front passenger's seat) G305 (under driver's seat) G402 (left rear of luggage compartment) Garage door opener transmitter (in overhead console) Hazard switch Headlamp switch Hot at all times Hvac control module I/p dimming sig Inflatable restraint steering wheel module coil (top of steering column) Inst panel lamp sply Instrument panel cluster (ipc) Led dimming sig Left rear door window switch Left steering wheel control switch Lighter) c2 Logic Manual transmission Pnk Radio Rear fuse block (below left side of rear seat) Reverse lockout solenoid (w/ custom seat) (base of floor shifter assembly) Right rear door window switch Right steering wheel control switch S202 S203 S219 S225 (inside of heated steering wheel) S312 S313 S333 (in body harness, approximately 35 cm (14 in) from breakout for left inflatable restraint side impact sensor) S383 S700 S800 Str/whl/ illum fuse f34 2a Sunroof switch (if equipped) Traction control switch W/ custom seat W/ individual seat
MEMORY SYSTEMS Memory Seat Wiring Diagram (1 of 5) for Buick Lucerne CXS 2007 List of elements for Memory Seat Wiring Diagram (1 of 5) for Buick Lucerne CXS 2007: 38 (4 in) from driver seat adjuster motor connector) (approximately 7 cm (3 in) from breakout for passenger seat cushion ventilation heat & cool module) s358 (approximately 7 cm (3 in) from passenger seat cushion ventilation heat & cool module connector) s357 (in driver seat harness, approximately 10 cm Battery Climate control seat module Computer data lines system Cool control Driver seat back ventilation heat & cool module (right side of driver's seat back) Driver seat cushion ventilation heat & cool module (under right side of driver's seat) Front passenger seat back ventilation heat & cool module Front passenger seat cushion ventilation heat & cool module G304 (under right front passenger's seat) Ground Heat control Heating element Hot at all times Hot in run or start Htd/cool fuse f27 30a Htd/cool/ ign 3 fuse f47 10a Ign 3 vol Lh mode sig Low ref Pnk Rear fuse block (below left side of rear seat) Rh mode sig S302 (w/ custom seat) S306 S355 S356 (in driver seat harness, approximately 9 cm (4 in) from driver seat cushion ventilation heat & cool module connector) Sens low ref Sens sig Serial data Speed ctrl Sup volt Tan Tan/pnk Thermistor Memory Seat Wiring Diagram (2 of 5) for Buick Lucerne CXS 2007 List of elements for Memory Seat Wiring Diagram (2 of 5) for Buick Lucerne CXS 2007: 44 Back cushion ind Back cushion sig Back cushion sw sig Back mode ind Back mode ind cntrl Back mode sw sig Battery pos volt Computer data lines system Cool ind cntrl Cool seat switch Cool sw sig Cooled seat switch Ddm fuse f24 15a Driver door module (ddm) Driver heated & cooled seat switch Easy exit seat switch Exit sig Front passenger door module (fpdm) Front passenger heated & cooled seat switch Full seat heat switch Gmlan serial data Heated seat back ind Heated seat cool ind Heated seat cushion ind Heated seat ind High ind ctrl High ref High temp ind Hot at all times Lamp dimming Low ind ctrl Low ref Low temp ind Medium ind ctrl Medium temp ind Memory 1 switch Memory 2 switch Pdm fuse f25 15a Pnk Rear fuse block (below left side of rear seat) Seat back heat switch Tan Tan/ red Tan/red Memory Seat Wiring Diagram (3 of 5) for Buick Lucerne CXS 2007 List of elements for Memory Seat Wiring Diagram (3 of 5) for Buick Lucerne CXS 2007: 52 (approximately 14 cm (6 in) from breakout for driver seat adjuster motor) s351 (under driver's seat) g300 A c1 B c1 Battery pos volt D c2 Down ctrl Driver lumbar position sensors Driver seat lumbar massage motor (in driver's seat back) Driver seat recline motor (in driver's seat back) Driver seat recline position sensor Forward ctrl Front ver mtr dn ctrl Front ver mtr up ctrl Ground Horizontal motor Horizontal sensor Hot at all times Lh back element ctrl Lh back sens low ref Lh cushion element ctrl Lh tempt sens low ref Low ref Lumbar forward ctrl Lumbar rearward ctrl Memory seat module (msm) (on underside of driver's seat, on seat adjuster frame) Memory seat sw high sig Msm logic/ rf massage fuse f36 10a Msm/lt frt pwr seat circuit breaker cb2 25a Pnk Pnk a Rear fuse block (below left side of rear seat) Rear ver mtr dn ctrl Rear ver mtr up ctrl Rearward ctrl Recline forward ctrl Recline rearward ctrl Red Red/ pnk Red/pnk Rh back sens low ref Rh cushion element ctrl Rh element ctrl Rh tempt sens low ref S305 S352 (in left front seat harness, approximately 7 cm (3 in) from breakout for inflatable restraint seat position sensor) Tan Tan/ red Tan/red Up ctrl Vertical motor Vertical sensor Memory Seat Wiring Diagram (4 of 5) for Buick Lucerne CXS 2007 List of elements for Memory Seat Wiring Diagram (4 of 5) for Buick Lucerne CXS 2007: 17 Driver seat adjuster motor assembly (below driver seat) Driver seat front vertical motor Driver seat front vertical position sensor Driver seat horizontal motor Driver seat horizontal position sensor Driver seat rear vertical motor Driver seat rear vertical position sensor Heating element Left front back heated seat element Left front cushion heated seat element Pnk Right front cushion heated seat element Right front heated seat back element S360 (in right front seat harness, between c314 & left front cushion heated seat element) Tan Tan/red Thermistor Memory Seat Wiring Diagram (5 of 5) for Buick Lucerne CXS 2007 List of elements for Memory Seat Wiring Diagram (5 of 5) for Buick Lucerne CXS 2007: 43 5v ref Computer data lines system Down Driver cushion tempt sens sig Driver lumbar adjuster switch Driver seat adjuster switch Driver seat back tempt sens sig Drv seat lumbar dn sw sig Drv seat lumbar forward sw sig Drv seat lumbar rearward sw sig Drv seat lumbar up sw sig Forward Front vertical down Front vertical down sw sig Front vertical mtr pos sens sig Front vertical up Front vertical up sw sig Gmlan serial data Heated seat ctrl module status sig Horizontal forward Horizontal mtr pos sens sig Horizontal rearward Horz forward sw sig Horz rearward sw sig Lumbar horizontal pos sens sig Lumbar vertical pos sens sig Memory seat module (msm) (on underside of driver's seat, on seat adjuster frame) Rear vertical down Rear vertical down sw sig Rear vertical mtr pos sens sig Rear vertical up Rear vertical up sw sig Rearward Recline forward Recline mtr forward ctrl Recline mtr pos sens sig Recline mtr rearward ctrl Recline rearward Rh seat back tempt sens sig Rh seat cushion tempt sens sig Rh seat mode signal S349 (approximately 8 cm (4 in) from breakout for auxiliary power outlet connector) Tan
NAVIGATION Navigation Wiring Diagram for Buick Lucerne CXS 2007 List of elements for Navigation Wiring Diagram for Buick Lucerne CXS 2007: 23 (coax) Battery Cellular microphone (in overhead console) Class 2 serial data Computer data lines system Drain Drain wire Drain wire voice rec low ref G305 (under driver's seat) Global positioning satellite (gps) antenna Gps antenna Ground Hot at all times Navigation voice sig voice rec aud sig Radio Rdo fuse f21 15a Rear fuse block (below left side of rear seat) Rec aud sig Rec low ref Signal Vehicle communication interface module (vcim) (if equipped) (on right front of trunk, attached to seat back brace) W/ communication system W/o communication system Parking Assistant Wiring Diagram for Buick Lucerne CXS 2007 List of elements for Parking Assistant Wiring Diagram for Buick Lucerne CXS 2007: 31 Center amber ind Center amber ind ctrl Computer data lines system G301 (under left rear seat) Ground Hot at all times Ign 1 voltage Left amber ind Left amber ind ctrl Left rear corner object alarm sensor (on left corner of rear bumper fascia) Left rear middle object alarm sensor (on left middle of rear bumper fascia) Low ref Low reference Low speed gmlan serial data Lr corner object sensor sig Lr middle object sensor sig Obj snsr fuse 37 10a Object alarm module (on right rear wheelwell) Object sensor sply volt Rear fuse block (below left side of rear seat) Rear park assist indicator Red ind Red ind ctrl Right rear corner object alarm sensor (on right corner of rear bumper fascia) Right rear middle object alarm sensor (on right middle of rear bumper fascia) Rr corner object sensor sig Rr middle object sensor sig S400 (in rear fascia harness, approximately 7 cm (3 in) from breakout for right middle object alarm sensor) S401 (in rear fascia harness, approximately 7 cm (3 in) from breakout for right middle object alarm sensor) Sensor signal Teltale assembly sply volt
POWER DISTRIBUTION Power Distribution Wiring Diagram (1 of 5) for Buick Lucerne CXS 2007 List of elements for Power Distribution Wiring Diagram (1 of 5) for Buick Lucerne CXS 2007: 62 (in engine harness, approximately 41 cm (16 in) from underhood fuse block connector c3) s111 (in ip harness, between c201 & c202) s229 (on right front of engine compt, forward of strut tower) underhood fuse block 3.8l 4.6l A/c fuse 10a A/c relay 11 Abs 1 fuse jc7 50a Abs 2 fuse jc6 60a Air bag ign 3 fuse 4 10a Air pump fuse jc8 50a Air pump relay 9 Air/ sol fuse 15a Air/sol relay 12 Automatic transmission Battery Cool/fan 1 relay 1 Cool/fan 2 relay 7 Crnk fuse jc4 40a Crnk relay 3 Ecm ign 3 fuse 5 10a Electronic brake control module (ebcm) Engine control module (ecm) (4.6l) powertrain control module (pcm) (3.8l) Fan 1 fuse jc2 30a Fan 2 fuse jc5 30a Fog lamp pcb relay From b trn/sig pcb relay (diagram 1 of 5) From ignition switch (diagram 5 of 5) Fusible link G112 (lower left rear of engine) Generator High/beam pcb relay Horn pcb relay Hvac control module Hvac/ipc fuse 14 10a Inflatable restraint i/p module indicator Inflatable restraint sensing & diagnostic module (sdm) Instrument panel cluster (ipc) Lo/beam pcb relay Pnk Pnk/ red Pwr/train relay 4 Recirculation actuator Red Run/ crank relay 6 S105 (4.6l) Starter motor To rear fuse block (diagram 2 of 5) To wpr fuse (diagram 1 of 5) Trans ign 3 fuse 6 10a Transmission control module (tcm) Trn/sig pcb relay W/ automatic a/c W/ electronic a/c W/ electronic a/c pnk W/ heated nozzle Windshield washer solvent heater Wpr fuse 25a Wpr hi relay 10 Wpr relay 8 Wsh htd fuse jc1 60a Wsh pcb relay Power Distribution Wiring Diagram (2 of 5) for Buick Lucerne CXS 2007 List of elements for Power Distribution Wiring Diagram (2 of 5) for Buick Lucerne CXS 2007: 51 (base) (below left side of rear seat) rear fuse block (in body harness, approximately 10 cm (4 in) from audio amplifier connector c1) s366 (in engine harness, approximately 80 cm (31 in) from underhood fuse block connector c3) s100 (uplvl) 3.8l 30a 4.6l Air bag fuse 13 10a Amp fuse 1 20a Amplifier Body control module Body harn mdl fuse 35 10a Cnstr vent fuse 5 10a Data link connector (dlc) Ddm fuse 24 15a Digital radio receiver Driver door module (ddm) Ecm/tcm fuse 28 15a Engine control module (ecm) Evaporative emission (evap) canister vent solenoid valve From battery (diagram 1 of 5) From c amp fuse 1 (diagram 2 of 5) Front climate control seat module Front passenger door module (fpdm) Garage door opener transmitter Htd/ cool fuse 27 30a Hvac control module I/p harn mdl fuse 31 10a Inflatable restraint passenger presence system (pps) module Inflatable restraint sensing & diagnostic module (sdm) Instrument panel cluster (ipc) Onstar/ s-band fuse 22 10a Pdm fuse 25 15a Pnk/ red Powertrain control module (pcm) Radio Rdo fuse 21 15a Red Remote control door lock receiver (rcdlr) Rvc sense fuse 29 10a S-band S301 (in body harness, approximately 14 cm (6 in) from breakout for yaw & lateral acceleration sensor) Tan/ red Theft deterrent module (tdm) To body harn mdl fuse 35 (diagram 2 of 5) To ign swtch fuse 48 (diagram 3 of 5) Transmission control module (tcm) Vehicle communication interface module W/ onstar W/ performance enhanced audio Power Distribution Wiring Diagram (3 of 5) for Buick Lucerne CXS 2007 List of elements for Power Distribution Wiring Diagram (3 of 5) for Buick Lucerne CXS 2007: 52 (below left side of rear seat) rear fuse block (in center console harness, approximately 10 cm (4 in) from breakout for a/t shift lock control solenoid) s315 (in right front seat harness, approximately 114 cm (45 in) from passenger seat adjuster switch connector) s348 Automatic level control (alc) compressor Automatic level control module Aux pwr fuse 14 20a Aux pwr fuse 23 20a Auxiliary power outlet console Blower motor control module Body control module (bcm) Chmsl/ bck-up fuse 18 10a Cigar lighter Cigar lighter (w/ custom seat) Driver seat adjuster switch Elc mdl fuse 7 10a Electronic suspension control (esc) module From d pdm fuse 25 (diagram 2 of 5) From e mrtd mdl fuse 6 (diagram 3 of 5) Front auxiliary power outlet G300 (under driver's seat) G304 (under right front passenger's seat) Hvac blwr fuse jc1 40a Ign switch fuse 48 5a Int lamps fuse 3 10a Lt trn/ sig fuse 15 15a Memory seat module Mrtd mdl fuse 6 25a Msm logic/ rf massage fuse 36 10a Msm/lt frt pwr seat circuit breaker 2 25a Msm/rt frt pwr seat circuit breaker 1 25a Obj snsr fuse 37 10a Object alarm module Passenger lumbar adjuster switch Passenger seat adjuster switch Red/ pnk Rr trn/ sig fuse 16 15a S221 S307 Switch dm fuse 10 10a To ignition switch (diagram 5 of 5) To obj snsr fuse 37 (diagram 3 of 5) To rap relay 1 (diagram 4 of 5) Trunk relse relay 6 W/ 8-way W/ air suspension W/ custom seat W/ individual seat W/ magneto rheological W/ memory seat W/ multi-directional W/ rear parking assist W/o memory seat Power Distribution Wiring Diagram (4 of 5) for Buick Lucerne CXS 2007 List of elements for Power Distribution Wiring Diagram (4 of 5) for Buick Lucerne CXS 2007: 55 (below left side of rear seat) rear fuse block (in body harness, approximately 19 cm (8 in) from breakout for g301) (in body harness, approximately 64 cm (26 in) from branch for battery current sensor) (in center console harness, approximately 8 cm (3 in) from breakout for a/t shift lock control solenoid) s381 Bck-up fuse 18 (diagram 3 of 5) Bcm logic fuse 12 10a Body control module (bcm) Ctsy/ rf trn fuse 4 10a Dr lck relay 9 Dr mdl/ pwr wndw circuit breaker 3 25a Dr unlck relay 10 Driver door module (ddm) Drl relay 4 Elc comprsr fuse jc3 30a Elc comprsr relay 15 Floor shifter assembly From branch for battery current sensor) s337 From chsml/ f From dr mdl/pwr g wndw circuit breaker 3 (diagram 3 of 5) Front climate control seat module Front passenger door module (fpdm) Fuel pump fuse 11 20a Fuel/ pump relay 7 G301 (under left rear seat) Heated steering wheel control module Htd str fuse 44 15a Htd/ cool/ ign 3 fuse 47 10a Inflatable restraint steering wheel module coil Inside rearview mirror Left rear door window switch Nca Outside moisture sensor (if equipped) Park switch Prk lamp relay 2 Rap fuse 41 10a Rap relay 1 Rear defog fuse jc2 40a Rear defog relay 14 Rear dr lck fuse 19 20a Reverse lockout solenoid Right rear door window switch Run relay 3 S/roof fuse 17 25a S302 S382 Shftr sol fuse 40 10a Sunroof control module Tan/ pnk To rear defog fuse jc2 (diagram 4 of 5) W/ custom seat W/ front heated seat cooling W/ heated nozzle W/ individual seat W/o front heated seat cooling Windshield washer solvent heater Power Distribution Wiring Diagram (5 of 5) for Buick Lucerne CXS 2007 List of elements for Power Distribution Wiring Diagram (5 of 5) for Buick Lucerne CXS 2007: 23 (in engine harness, approximately 13 cm (5 in) from breakout for c138) s104 (in steering column harness, between c203 & ignition switch connector) s201 3.8l 4.6l Acc Body control module (bcm) Engine control module (ecm) From ign sw fuse (diagram 3 of 5) Ignition switch Inflatable restraint steering wheel module coil Key-in switch Left steering wheel control switch Off Pnk Powertrain control module (pcm) Rear fuse block (below left side of rear seat) Right steering wheel control switch Run Start Str/whl/ illum fuse 34 2a Theft deterrent module (tdm) To run/crank relay 6 (diagram 1 of 5) Transmission control module (tcm)
POWER DOOR LOCKS Power Door Locks Wiring Diagram for Buick Lucerne CXS 2007 List of elements for Power Door Locks Wiring Diagram for Buick Lucerne CXS 2007: 68 (in body harness, approximately 9 cm (3 in) from branch for c314) s343 (under center of rear package shelf) remote control door lock receiver (rcdlr) (under left rear seat) g301 Battery Body control module (bcm) (right of glove box) Body harn mdl fuse f35 10a Computer data lines system Ddm fuse f24 15a Dr lck relay r9 Dr lock act ctrl Dr mdl/ pwr wndw circuit breaker cb3 25a Dr unlck relay r10 Dr unlock act ctrl Driver door latch assembly (rear of driver's door) Driver door module (ddm) Drv dr key sw sig Exterior lights system Front passenger door latch assembly (rear of front passenger's door) Front passenger door module (fpdm) G104 (right front corner of engine compt) G300 (under driver's seat) G301 (under left rear seat) G304 (under right front passenger's seat) G306 (at left "c" pillar) Gmlan serial data Ground Hood ajar sw sig Hood ajar switch (w/ remote keyless entry) (center front of engine compt) Hood closed sw sig Horn rly ctrl Horns system Hot at all times Ign Instrument panel cluster (ipc) Keyless entry antenna Keyless entry antenna sig Left rear door latch assembly (rear of left rear door) Lf dr ajar sw sig Lf dr open sw sig Lf dr sw low ref Logic Low spd gmlan ser data Lr dr ajar sw sig Lr dr lock mtr ctrl Lr dr open sw sig Nca Park lamp rly ctrl Pdm fuse f25 15a Rear dr lck fuse f19 20a Rear fuse block (below left side of rear seat) Rf dr ajar sw sig Rf dr open sw sig Rf dr sw low ref Right rear door latch assembly (rear of right rear door) Rr dr ajar sw sig Rr dr open mtr ctrl S301 S337 S385 S700 S800 Security ind Serial data Tan Tan/ red Tan/red W/ theft deterrent system W/o theft deterrent system
POWER MIRRORS Electrochromic Mirror Wiring Diagram for Buick Lucerne CXS 2007 List of elements for Electrochromic Mirror Wiring Diagram for Buick Lucerne CXS 2007: 21 (left rear of luggage compt) g402 Automatic day/night mir low ref Automatic day/night mir sig Computer data lines system Driver outside rearview mirror (in driver's door) Exterior lights system Gmlan serial data Ground Hot w/ rap relay energized Ign positive vol Inside rearview mirror Keypad green led sig Keypad red led sig Keypad sig Nca Power distribution system Rap fuse 10a Rear fuse block (below left side of rear seat) S312 S382 Vehicle communication interface module (vcim) (w/ onstar) (on right front of trunk, attached to seat back brace) Power Mirrors Wiring Diagram for Buick Lucerne CXS 2007 List of elements for Power Mirrors Wiring Diagram for Buick Lucerne CXS 2007: 33 5v ref Battery positive voltage Ddm fuse 15a Defogger system Driver door module (ddm) Driver mir horz pos sens sig Driver mir ver pos sens sig Driver outside rearview mirror (in driver's door) Electrochromic mirror circuit Exterior lights system Front passenger door module (fpdm) Heating element Horizontal Horizontal motor Hot at all times Left mir mtr dn ctrl Left mir mtr left ctrl Left mir mtr up/right ctrl Low ref Nca Outside rearview mirror switch Pass mir horz pos sens sig Pass mir mtr left ctrl Pass mir ver pos sens sig Passenger outside rearview mirror (in front passenger door) Pdm fuse 15a Rear fuse block (below left side of rear seat) Right mir mtr dn ctrl Right mir mtr up/right ctrl Tan/ red Tan/pnk Tan/red Vertical motor
POWER SEATS 6-Way Power Seat Wiring Diagram for Buick Lucerne CXS 2007 List of elements for 6-Way Power Seat Wiring Diagram for Buick Lucerne CXS 2007: 26 Driver seat adjuster motor assembly (below driver seat) Driver seat adjuster switch Driver seat front vertical motor Driver seat horizontal motor Driver seat rear vertical motor Forward Front down Front passenger seat adjuster motor assembly (below front passenger's seat) Front passenger seat front vertical motor Front passenger seat horizontal motor Front passenger seat rear vertical motor Front up G300 (under driver's seat) G304 (under right front passenger's seat) Hot at all times Msm/lt frt pwr seat circuit breaker cb2 25a Msm/rt frt pwr seat circuit breaker cb1 25a Nca Passenger seat adjuster switch Rear down Rear fuse block (below left side of rear seat) Rear up Rearward Red/ pnk S387 Tan 8-Way Passenger Power Seat Wiring Diagram for Buick Lucerne CXS 2007 List of elements for 8-Way Passenger Power Seat Wiring Diagram for Buick Lucerne CXS 2007: 22 Forward Front down Front passenger seat adjuster motor assembly (below front passenger's seat) Front passenger seat front vertical motor Front passenger seat horizontal motor Front passenger seat rear vertical motor Front passenger seat recline motor Front up G304 (under right front passenger's seat) Hot at all times Msm/rt frt pwr seat circuit breaker cb1 25a Nca Passenger seat adjuster switch Rear down Rear fuse block (below left side of rear seat) Rear up Rearward Recline forward Recline rearward S306 S348 Tan Heated Steering Wheel Wiring Diagram for Buick Lucerne CXS 2007 List of elements for Heated Steering Wheel Wiring Diagram for Buick Lucerne CXS 2007: 17 C1 d D c2 G300 (under driver's seat) Ground Heated steering wheel Heated steering wheel control module Heated steering wheel on ind Heated steering wheel switch Hot w/ run relay energized Htd str fuse f44 15a Ign 1 vol Ind ctrl Inflatable restraint steering wheel module coil (top of steering wheel) Left steering wheel control switch Nca Rear fuse block (below left side of rear seat) Red Lumbar Wiring Diagram for Buick Lucerne CXS 2007 List of elements for Lumbar Wiring Diagram for Buick Lucerne CXS 2007: 12 Down Forward Front passenger seat lumbar motor G304 (under right front passenger's seat) Hot at all times Msm/rt frt pwr seat circuit breaker cb1 25a Passenger lumbar adjuster switch Pnk Rear fuse block (below left side of rear seat) Rearward S306 (w/ 8 way) S348 (w/ 8 way)
POWER TOP/SUNROOF Power Top/Sunroof Wiring Diagram for Buick Lucerne CXS 2007 List of elements for Power Top/Sunroof Wiring Diagram for Buick Lucerne CXS 2007: 38 (not used) Accessory vol Battery Close ctrl Close sig Close vent sig Dimming Express sig G402 (left rear of luggage compartment) G403 (right front wall of luggage compartment) Ground Hot in run or start Interior lights system Limit switch Low ref Open ctrl Open sig Open vent sig Pnk Rap fuse f41 10a Rear fuse block (below left side of rear seat) Roof close Roof express Roof open S/roof fuse f17 25a S313 S330 S382 Soft stop sig Sunroof control module (rear of sunroof opening) Sunroof motor Sunroof motor assembly Sunroof switch Tan Vent close Vent express Vent express sig Vent open
POWER WINDOWS Power Windows Wiring Diagram for Buick Lucerne CXS 2007 List of elements for Power Windows Wiring Diagram for Buick Lucerne CXS 2007: 40 (under left rear seat) g301 (under right front passenger's seat) g304 Batt volt Body control module (bcm) (right of glove box) Computer data lines system Dr mdl/ pwr wndw circuit breaker cb3 25a Driver door module (ddm) Driver door window switch Driver window motor (in driver's door) Front passenger door module (fpdm) Front passenger door window switch Front passenger window motor (in front passenger's door) G300 (under driver's seat) G304 (under right front passenger's seat) Gmlan serial data Ground Hot at all times Interior lights system Left front down ctrl Left front up ctrl Left rear door window switch Left rear down ctrl Left rear down sig Left rear up ctrl Left rear up sig Left rear window motor (in left rear door) Logic Master sw sig Rear fuse block (below left side of rear seat) Right rear door window switch Right rear down ctrl Right rear down sig Right rear sig Right rear up ctrl Right rear up sig Right rear window motor (in right rear door) S337 S700 S800 Sply volt
RADIO Radio Wiring Diagram, with Amplifier (1 of 2) for Buick Lucerne CXS 2007 List of elements for Radio Wiring Diagram, with Amplifier (1 of 2) for Buick Lucerne CXS 2007: 55 (on right front of trunk, attached to seat back brace) (if equipped) vehicle communication interface module (vcim) (under driver's seat) g305 14v sw sply volt 14v sw sply voltage Amplifier control Antenna sig Antenna signal Anti-lock brakes system Audio common sig Audio communication sig Backlight lamp ctrl Battery Battery pos voltage Coaxial cable Computer data lines system Device left audio sig Digital radio antenna (center rear of roof) Digital radio receiver (drr) (at left "d" pillar) Drain wire Front audio drain wire G305 (under driver's seat) Gps antenna Gps antenna (under top center of dash) Ground Hot at all times Interior lights system Lf low level audio (-) Lf low level audio sig Lr low level audio (-) Lr low level audio sig Navigation system Navigation voice sig Pnk Radio Radio antenna module (at right "d" pillar) Radio audio (-) Radio left audio sig Rdo fuse f21 15a Rear audio drain wire Rear fuse block (below left side of rear seat) Remote radio audio (-) Remote radio left audio sig Rf low level audio (-) Rf low level audio sig Right audio sig (1) Right audio sig (2) Right audio signal (1) Right audio signal (2) Rr low level audio (-) Rr low level audio sig Serial data Speed gmlan serial data Tan Tan/red Vehicle speed sig Radio Wiring Diagram, with Amplifier (2 of 2) for Buick Lucerne CXS 2007 List of elements for Radio Wiring Diagram, with Amplifier (2 of 2) for Buick Lucerne CXS 2007: 66 (base) (uplevel) Amp fuse f1 20a 30a Amplifier (mounted to left rear of rear seat) Amplifier ctrl Battery Body control module (bcm) (right of glove box) Bus + Bus - Computer data lines system Cruise control system Ctrl sig F cen spkr (+) F cen spkr (-) Front center speaker G305 (under driver's seat) Ground Hot at all times Inflatable restraint steering wheel module coil (top of steering column) Info Left front door speaker Left front tweeter speaker Left rear door speaker Left rear speaker Lf low level (-) Lf low level sig Lf speaker (+) Lf spkr sig (-) Lr low level (-) Lr low level sig Lr mid spkr (+) Lr mid spkr (-) Lr speaker (-) Lr spkr sig (+) Module coil) s220 Mute Pnk Rear fuse block (below left side of rear seat) Rf low level (-) Rf low level sig Rf speaker (+) Rf spkr sig (-) Right front door speaker Right front tweeter speaker Right rear door speaker Right rear speaker Right steering wheel control switch Rr low level (-) Rr low level sig Rr mid spkr (+) Rr mid spkr (-) Rr speaker (+) Rr spkr sig (-) S361 (in body harness, between c300 & amplifier) S362 (in body harness, between c300 & amplifier) S363 (in body harness, between c301 & amplifier) S364 (in body harness, between c301 & amplifier) S365 S366 Seek dn Seek up Source Sply volt Tan Tan/red Volume dn Volume up Radio Wiring Diagram, without Amplifier for Buick Lucerne CXS 2007 List of elements for Radio Wiring Diagram, without Amplifier for Buick Lucerne CXS 2007: 64 (between cruise control on/off switch & inflatable restraint steering wheel module coil) (in body harness, between c300 & amplifier) s361 (in body harness, between c301 & amplifier) s363 (on right front of trunk, attached to seat back brace) (if equipped) vehicle communication interface module (vcim) 14v sw sply volt 14v sw sply voltage Antenna sig Antenna signal Anti-lock brakes system Audio common sig Audio communication sig Backlight lamp ctrl Battery Body control module (bcm) (right of glove box) Bus + Bus - Coaxial cable Computer data lines system Cruise control system Ctrl sig Device left audio sig Drain wire G305 (under driver's seat) Gps antenna Gps antenna (under top center of dash) Ground Hot at all times Inflatable restraint steering wheel module coil (top of steering column) Info Interior lights system Left front door speaker Left front spkr (+) Left front spkr sig (-) Left front tweeter speaker Left rear speaker Lr midrange speaker (-) Lr midrange spkr (+) Mute Navigation system Navigation voice sig Pnk Radio Radio antenna module (at right "d" pillar) Rdo fuse f21 15a Rear fuse block (below left side of rear seat) Right front door speaker Right front spkr (+) Right front spkr sig (-) Right front tweeter speaker Right rear speaker Right steering wheel control switch Rr midrange spkr (+) Rr midrange spkr (-) S362 (in body harness, between c300 & amplifier) S364 (in body harness, between c301 & amplifier) Seek dn Seek up Source Speed gmlan serial data Sply volt Tan Vehicle speed sig Volume dn Volume up
SHIFT INTERLOCK Shift Interlock Wiring Diagram for Buick Lucerne CXS 2007 List of elements for Shift Interlock Wiring Diagram for Buick Lucerne CXS 2007: 49 3.8l 4.6l 5 volt ref A/t shift lock control solenoid Automatic transmission Body control module (bcm) (right of glove box) Brake pedal position sensor (top of brake pedal assembly) Column shifter shift lock control solenoid Computer data lines system D n Data bus + Data bus - Engine control module (ecm) (4.6l) (left side of engine compt) Floor shifter assembly (w/ custom seat) G112 (lower left rear of engine) G300 (under driver's seat) G304 (under right front passenger's seat) Hot in run or start Htd/cool/ ign 3 fuse 10a Ignition lock cylinder solenoid Interior lights system Low ref Park switch Powertrain control module (pcm) (3.8l) (left front of engine compt, inside air cleaner housing) Prndl lamp Range sig a Range sig b Range sig c Range sig p Rear fuse block (below left side of rear seat) Reverse lockout solenoid S105 S204 S302 (w/ climate control seats) S381 S383 Sensor sig Shftr sol fuse 10a Sol ctrl Supp volt Switch signal a Switch signal b Switch signal c Switch signal p Tan Transmission control module (tcm) (4.6l: left rear of engine compt) Transmission internal mode switch (ims) W/ custom seat/ floor shifter W/ individual seat/ column shifter
STARTING/CHARGING Charging Wiring Diagram for Buick Lucerne CXS 2007 List of elements for Charging Wiring Diagram for Buick Lucerne CXS 2007: 30 3.8l 4.6l Battery Battery current sensor (below right side of rear seat) Battery ind Battery positive volt Body control module (bcm) (right of glove box) Computer data lines system Current sensor low ref Current sensor sig Fusible link G303 (below right side of rear seat) Gen f-term Gen l-term Generator Ground Hi speed gmlan serial data + Hi speed gmlan serial data - Ign Instrument panel cluster (ipc) Lo spd gmlan serial data Logic Powertrain control module (pcm) (3.8l) engine control module (ecm) (4.6l) (4.6l: left side of engine compt) (3.8l: left front of engine compartment, inside air cleaner housing) Rear fuse block (below left side of rear seat) Red Rvc sense fuse 10a Serial data Starter motor Tan Underhood fuse block (on right front of engine compt, forward of strut tower) Starting Wiring Diagram for Buick Lucerne CXS 2007 List of elements for Starting Wiring Diagram for Buick Lucerne CXS 2007: 41 (3.8l) (4.6l) 3.8l 4.6l Acc Automatic transmission Battery Body control module (bcm) (right of glove box) Charging circuit Computer data lines system Crank fuse 40a Crank relay 3 Ecm ign 3 fuse 10a Ecm/ crank fuse 15a G112 (lower left rear of engine) G303 (below right side of rear seat) Ground distribution system Hi speed gmlan serial data + Hi speed gmlan serial data - Hot at all times Hot w/ powertrain relay energized Ign 1 vol Ign sw fuse 5a Ignition switch Internal mode switch (ims) Off Park/neutral sig Pnk Powertrain control module (pcm) (3.8l) engine control module (ecm) (4.6l) (4.6l: left side of engine compt) (3.8l: left front of engine compartment, inside air cleaner housing) Rear fuse block (below left side of rear seat) Red Run Run/crank ign 1 vol Run/crank relay 6 S101 S105 Start Starter ctrl Starter motor Tan Underhood fuse block (on right front of engine compt, forward of strut tower)
SUPPLEMENTAL RESTRAINTS Supplemental Restraints Wiring Diagram (1 of 2) for Buick Lucerne CXS 2007 List of elements for Supplemental Restraints Wiring Diagram (1 of 2) for Buick Lucerne CXS 2007: 44 (in body harness, approximately 42 cm (17 in) from breakout for yaw & lateral acceleration sensor) s370 (in steering wheel) inflatable restraint steering wheel module (right side of dash) inflatable restraint i/p module (under right front A1 c3 Air bag ign 3 fuse 4 10a Batt positive vol Case ground Computer data lines system Ground High control Hot w/ run/crnk relay energized Ign 1 vol Inflatable restraint sensing & diagnostic module (sdm) (under center console) Inflatable restraint steering wheel module coil (top of steering column) Left inflatable restraint front end sensor (left front of engine compartment) Left inflatable restraint side impact module (left side of driver's seat back) Left inflatable restraint side impact sensor (sis) (base of left "b" pillar) Left seat belt switch Low control Low reference Low speed Nca Passenger's seat) g302 Pin shorting bars engaged Pnk Pnk/ red Pnk/red Right inflatable restraint front end sensor (right front of engine compartment) Right inflatable restraint seat position sensor (sps) (on front passenger's seat left seat rail) Right inflatable restraint side impact module (right side of front passenger's seat back) Right inflatable restraint side impact sensor (sis) (base of right "b" pillar) Right seat belt switch Sensor signal Sensor voltage Shorting bar Stage 1 Stage 2 Switch signal Tan Tan/ pnk Tan/pnk Underhood fuse block (on right front of engine compt, forward of strut tower) When module connector is disconnected from harness: (shorting bars are connected between following pins: 20-21 & 22-23) Supplemental Restraints Wiring Diagram (2 of 2) for Buick Lucerne CXS 2007 List of elements for Supplemental Restraints Wiring Diagram (2 of 2) for Buick Lucerne CXS 2007: 40 (left rear of luggage compt) g402 (under driver's seat) g300 Air bag fuse 13 10a Air bag ind Batt positive vol Computer data lines system Gmlan (sdm) Ground Hot at all times Ign Inflatable restraint i/p module indicator Inflatable restraint passenger presence system (pps) module (under front passenger's seat) Inflatable restraint passenger presence system (pps) sensor (under right side of front passenger's seat) Inflatable restraint passenger seat belt tension retractor sensor (bottom of right "b" pillar) Instrument panel cluster (ipc) Left front seat belt pretensioner Left inflatable restraint roof rail module (if equipped) (left roof rail) Logic Low reference Nca Off ind On ind Pass air bag off ind ctrl Pass air bag on ind ctrl Pass seat belt ind Passenger air bag ind Pnk Pnk/ red Pnk/red Pnk/tan Rear fuse block (below left side of rear seat) Right front seat belt pretensioner Right inflatable restraint roof rail module (if equipped) (right roof rail) S312 (in headliner harness, approximately 10 cm (4 in) from branch for c321) Seat belt ind Sensor signal Serial data Shorting bar Tan Voltage reference
TRANSMISSION
3.8L VIN 2 3.8L VIN 2, A/T Wiring Diagram for Buick Lucerne CXS 2007 List of elements for 3.8L VIN 2, A/T Wiring Diagram for Buick Lucerne CXS 2007: 58 (approximately 59 cm (24 in) from left front wheel speed sensor) (left rear of engine) (lower left rear of engine) g112 (not used) 1-2 shift sol 1-2 shift solenoid valve 2-3 shift sol 2-3 shift solenoid valve 5 volt ref 2 A/t fluid pressure manual valve position switch A/t fluid temperature sensor A/t input shaft speed sensor At iss sig high At iss sig low Automatic transmission Battery Code a Code b Code c Ecm ign 3 fuse f5 10a Ecm/ tcm fuse f28 15a Ect sensor sig Engine coolant temperature sensor Exterior lights system Hot at all times Hot in run or start Hot w/ run crank relay r6 energized Ignition 1 Low ref Manifold absolute pressure sensor (on top front of engine) Map sensor sig P/n Parity Pc sol high Pc sol low Pnk Powertrain control module (left front of engine compt, inside air cleaner housing) Pressure control solenoid valve Rear fuse block (below left side of rear seat) Red a Red s115 Stop lmp sw sig Tan Tan b Tcc sol Tcc sw sig Tft sensor sig Torque converter clutch solenoid valve Tr sig a Tr sig b Tr sig c Tr sig p Trans ign 3 fuse f6 10a c3 Transmission internal mode switch Underhood fuse block (on right front of engine compartment, forward of strut tower) Vehicle speed sensor (in transmission) Vss sig high Vss sig low
4.6L VIN Y 4.6L VIN Y, A/T Wiring Diagram for Buick Lucerne CXS 2007 List of elements for 4.6L VIN Y, A/T Wiring Diagram for Buick Lucerne CXS 2007: 62 (approximately 41 cm (16 in) from underhood fuse block connector c3) s111 (in engine harness, (in steering column harness, between c203 & ignition switch connector) (in transmission) vehicle speed sensor (right of glove box) body control module Acc Approximately 13 cm (5 in) from breakout for c138) Automatic transmission Automatic transmission input shaft speed sensor Battery Computer data lines system Ecm/tcm fuse f28 15a Engine control module (left side of engine compartment) Exterior lights system G112 (lower left rear of engine) Gmlan serial data Ground Hot at all times Hot in run or start Ign 1 Ignition switch Iss high sig Iss low sig Low ref Nca Off P/n P/n signal Pc sol hi ctrl Pc sol vlv ctrl Pnk Pressure control solenoid valve Rear fuse block (below left side of rear seat) Run S100 (in engine harness, approximately 80 cm (31 in) from underhood fuse block connector c3) S104 S201 Ser data Serial data Serial data bus+ Serial data bus- Shift sol valve a Shift sol valve b Shift sol vlv a Shift sol vlv b Start Stop lamp sw sig Tan Tcc sol ctrl Tcc sol valve Tft sens sig Trans ign 3 fuse f6 10a Trans range a Trans range b Trans range c Trans range p Transmission control module (tcm) (left rear of engine compartment) Transmission fluid temperature sensor Transmission internal mode switch Underhood fuse block (on right front of engine compartment, forward of strut tower) Vss hi sig Vss low sig
TRUNK, TAILGATE, FUEL DOOR Trunk Release Wiring Diagram for Buick Lucerne CXS 2007 List of elements for Trunk Release Wiring Diagram for Buick Lucerne CXS 2007: 14 (under driver's seat) g300 Body control module (bcm) (right of glove box) G301 (under left rear seat) G402 (left rear of luggage compt) Hot at all times Interior lights system Rear compartment lid latch (center rear of luggage compt) Rear compartment lid release switch Rear fuse block (below left side of rear seat) S203 Trunk ajar sw sig c6 Trunk release ctrl c2 Trunk release relay ctrl c7 Trunk relse relay r6
WARNING SYSTEMS Warning Systems Wiring Diagram for Buick Lucerne CXS 2007 List of elements for Warning Systems Wiring Diagram for Buick Lucerne CXS 2007: 80 (w/ rke) keyless entry antenna Acc Air bag ign 3 fuse f4 10a Audible alarm Auto Battery positive volt Body control module (bcm) (right of glove box) Check tire pressure service tire monitor Chmsl/ bck-up fuse f18 10a Coax Computer data lines system Driver door latch assembly (rear of driver's door) Driver door module (ddm) Exterior lights system G304 (under right front passenger's seat) G306 (at left "c" pillar) Gmlan Gmlan serial data Gmlan serial data gmlan serial data Ground Head Headlamp switch Hot at all times Hot w/ run crank relay r6 energized Ign Ign swtch fuse f48 5a Ignition switch Inflatable restraint i/p module indicator Inflatable restraint sensing & diagnostic module (under center console) Instrument panel cluster (ipc) Ipc Key-in ignition switch Keyless entry/ tire pressure antenna signal Left front tire pressure sensor Left rear tire pressure sensor Left seat belt buckle Left seat belt switch Lf door ajar sw sig Lf door open sw sig Lf door sw low ref Lf seat belt sw sig Logic Low ref Low spd serial data Low tire pressure indicator Lt trn/ sig fuse f15 15a Lt turn sig switch Message center Message request Nca Off Off/run crank vol Park Park lp sw sig Passenger seat belt ind Pnk Pnk/ red Radio Rear fuse block (below left side of rear seat) Remote control door lock receiver (rcdlr) (under center of rear package shelf) Rf seat belt sw sig Right front tire pressure sensor Right rear tire pressure sensor Right seat belt buckle Right seat belt switch Rr trn/ sig fuse f16 15a Rt turn sig switch Run S206 S370 (in body harness, approximately 42 cm (17 in) from breakout for yaw & lateral acceleration sensor) S385 Seat belt indicator Serial data Solid state Start Tan/ pnk Tan/pnk Underhood fuse block (on right front of engine compartment, forward of strut tower) W/ theft deterrent system W/o theft deterrent system
WIPER/WASHER Wiper/Washer Wiring Diagram for Buick Lucerne CXS 2007 List of elements for Wiper/Washer Wiring Diagram for Buick Lucerne CXS 2007: 64 Acc volt Batt pos volt Body control module (bcm) (right of glove box) Check washer fluid Delay switch Fluid ind ctrl Fluid sw sig G101 (left front corner of engine compt) G104 (right front corner of engine compt) G300 (under driver's seat) G304 (under right front passenger's seat) G402 (left rear of luggage compt) Ground Heated washer fluid ind ctrl Heated washer fluid switch Heated washer fluid washer sys off High High speed rly ctrl Hot at all times Hot in run or start Htd/ cool ign 3 fuse f47 10a Instrument panel cluster (ipc) Int Logic Low Low washer fluid ind sig Message center Mist Off Outside moisture sensor (if equipped) (above rearview mirror on windshield) Park sw sig Park switch Pnk Power distribution system Rap fuse f41 10a Rear fuse block (below left side of rear seat) Run ign 3 volt S204 S312 S382 Sen sig 1 Sen sig 2 Sensor signal 1 Sensor signal 2 Tan Turn signal/multi-function switch Underhood fuse block (on right front of engine compt, forward of strut tower) Washer rly ctrl Washer sw sig Washer switch Windshield washer fluid level switch (bottom of windshield washer fluid reservoir) Windshield washer fluid pump (bottom of windshield washer fluid reservoir) Windshield washer solvent heater (w/ heated nozzles) Windshield wiper motor (on left side of firewall) Wiper rly ctrl Wiper sw high sig Wiper sw low sig Wiper switch Wpr fuse f18 25a Wpr hi relay r10 Wpr relay r8 Wsh pcb relay Wsw htd fuse jc1 60a Wsw/ pump fuse f12 15a
