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Buick LaCrosse CX 2009 - 2009 ELECTRICAL Fuses & Circuit Breakers - LaCrosse
Buick LaCrosse CX 2009 - IDENTIFICATION
CAUTION: When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See PROGRAMMING AND SETUP article in GENERAL INFORMATION before disconnecting battery.
Buick LaCrosse CX 2009 - FUSIBLE LINKS
To identify and/or repair fusible links, see Fig. 1.
Fig. 1: Buick LaCrosse CX 2009 - Component Locations - Repairing Fusible Links
Buick LaCrosse CX 2009 - INSTRUMENT PANEL FUSE BLOCK
NOTE: Instrument panel fuse block is located on right side of instrument panel behind access panel.
Buick LaCrosse CX 2009 Fuse Block - I/P
Device Rating Description CHMSL/BKUP Fuse 15A Body Control Module (BCM) CLSTR Fuse 10A Instrument panel Cluster (IPC) CNSTR Fuse 10A Evaporative Emission (EVAP) Canister Vent Solenoid Valve CRUISE Fuse 2A Steering Wheel Control Switch - Left DR/LCK TRUNK Fuse 15A Body Control Module (BCM) HAZRD Fuse 20A Body Control Module (BCM) HTD/MIR Fuse 10A Outside Rearview Mirror - Driver (DK2) and Outside Rearview Mirror - Passenger (DK2) HTD/SEAT Fuse 20A Heated Seat Relay - Driver (KA1) and Heated Seat Relay - Passenger (KA1) HVAC Fuse 10A HVAC Control Module INT/ILLUM Fuse 10A Body Control Module (BCM) ONSTAR/ALDL Fuse 10A Vehicle Communication Interface Module (VCIM) (UE1) and Data Link Connector (DLC) PRK/LAMP Fuse 10A PRK/ LAMP Relay PRK/LAMP Relay - Marker Lamp - Left Front, Marker Lamp - Left Rear, Marker Lamp - Right Front, Marker Lamp - Right Rear, Park/Turn Signal Lamp - Left Front, Park/Turn Signal Lamp - Right Front, Tail Lamp - Left Lower, Tail Lamp - Left Upper, Tail Lamp - Right Lower, Tail Lamp - Right Upper, Tail/Stop and Turn Signal Lamp - Left, Tail/Stop and Turn Signal Lamp - Right, License Lamp - Left, and License Lamp - Right PRK/SWITCH Fuse 5A Park Switch PWR/MIR Fuse 10A Outside Rearview Mirror Switch PWR/SEAT Circuit Breaker 25A Seat Adjuster Switch - Driver (AG1), Seat Adjuster Switch - Passenger (AG2), and Seat Lumbar Switch - Driver (AL9) PWR/WNDW Circuit Breaker 25A Window Switch - Driver, and Window Switch - Passenger RAP Relay - PRK/SWITCH, S/ROOF Fuses and PWR/WNDW Circuit Breaker R/DEFOG Relay - HTD/MIR Fuse and Rear Window Defogger Grid RDO/AMP Fuse 25A Radio and Audio Amplifier (U88) RFA/MOD Fuse 10A Digital Radio Receiver (U2K), Remote Control Door Lock Receiver (RCDLR), and Inflatable Restraint Front Passenger Presence System (PPS) Module S/ROOF Fuse 20A Inside Rearview Mirror and Sunroof Motor (CF5) STR/WHL/ILLUM Fuse 2A Steering Wheel Control Switch - Left (UK3), Steering Wheel Control Switch - Right (UK3)
Buick LaCrosse CX 2009 - UNDERHOOD FUSE BLOCK
NOTE: Underhood electrical center is located on right side of engine compartment, mounted to strut tower.
Buick LaCrosse CX 2009 - Underhood Fuse Block (L26 or LY7 - 3.8L)
Buick LaCrosse CX 2009 Fuse Block - Underhood (L26 or LY7 - 3.8L)
No. Device Rating Description 1 LF HI BEAM Fuse 10A Headlamp - Left High Beam 2 RF HI BEAM Fuse 10A Headlamp - Right High Beam 3 LF LO BEAM Fuse 10A Headlamp - Left Low Beam 4 RF LO BEAM Fuse 10A Headlamp - Right Low Beam 5 WIPER/WS Fuse 25A WIPER Relay 6 WASHER/RVC Fuse 15A Body Control Module (BCM) 7 FOG LPS Fuse 15A FOG LP Relay 8 TCM Fuse 15A Transmission Control Module (TCM) 9 SIR Fuse 10A Inflatable Restraint Passenger Air Bag On/Off Indicator, Inflatable Restraint Front Passenger Presence System (PPS) Module, and Inflatable Restraint Sensing and Diagnostic Module (SDM) 10 AUX PWR Fuse 25A Accessory Power Outlet and Cigar Lighter 11 HORN Fuse 15A HORN Relay 12 EMISSION Fuse 10A Evaporative Emission (EVAP) Canister Purge Solenoid Valve (L26), Heated Oxygen Sensor (HO2S) 2 (LY7), Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor, Secondary Air Injection (AIR) Pump Relay (NU6), and Secondary Air Injection (AIR) Pump Solenoid Relay (NU6) 13 A/C CLUTCH Fuse 10A A/C COMP Relay 14 02 SSR Fuse 15A Camshaft Position (CMP) Actuator Solenoid Valve - Bank 1 Intake (LY7), Camshaft Position (CMP) Actuator Solenoid Valve - Bank 2 Intake (LY7), Camshaft Position (CMP) Actuator Solenoid Valve - Bank 1 Exhaust (LY7), Camshaft Position (CMP) Actuator Solenoid Valve - Bank 2 Exhaust (LY7), Evaporative Emissions (EVAP) Canister Purge Solenoid Valve (LY7), Heated Oxygen Sensor (HO2S) 1, and Heated Oxygen Sensor (HO2S) 2 (L26) 15 PCM Fuse 10A CRANK Relay, Engine Control Module (ECM) (LY7), and Powertrain Control Module (PCM) (L26) 16 PCM/ETC Fuse 15A Engine Control Module (ECM) (LY7) and Powertrain Control Module (PCM) (L26) 17 ETC Fuse 15A Engine Control Module (LY7) and Throttle Body (L26) 18 DISPLAY Fuse 10A Air Temperature Sensor - Inside (CJ2), Electronic Compass Module (U68), HVAC Control Module, Rear Object Sensor Control Module (UD7), and CRUISE Fuse 19 ABS SOL Fuse 25A Electronic Brake Control Module (EBCM) (JL9) 20 FUEL INJ Fuse 15A Fuel Injector 1, Fuel Injector 2 (L26), Fuel Injector 3, Fuel Injector 4 (L26), Fuel Injector 5, Fuel Injector 6 (L26), Ignition Coil 1 (LY7), Ignition Coil 3 (LY7), and Ignition Coil 5 (LY7) 21 TRANS SOL Fuse 10A 1-2 Shift Solenoid (SS) Valve, 2-3 Shift Solenoid (SS) Valve, Torque Converter Clutch (TCC) Solenoid Valve, and Transmission Control Module (TCM) (LY7) 22 FUEL PP Fuse 15A FUEL PP Relay 23 ABS Fuse 10A Electronic Brake Control Module (EBCM) (JL9), Steering Angle Sensor (JL4), and Yaw and Lateral Accelerometer Sensor (JL4) 24 ELEK IGN Fuse 15A Fuel Injector 2 (LY7), Fuel Injector 4 (LY7), Fuel Injector 6 (LY7), Ignition Coil 2 (LY7), Ignition Coil 4 (LY7), Ignition Coil 6 (LY7), and Ignition Control Module (ICM) (L26), 25 AIR PUMP Fuse 50A Secondary Air Injection (AIR) Pump Relay (NU6) 26 BATT MAIN 1 Fuse 40A PRK/LAMP, CHMSL/BKUP, INT/ILLUM, RFA/MOD, RDO/AMP, ONSTAR/ALDL, HVAC, CLSTR and CNSTR Fuses 27 BATT MAIN 2 Fuse 50A DR/LCK TRUNK, HAZRD, HTD/SEAT, and PWR/MIR Fuses, PWR/SEAT Circuit Breaker, and RAP Relay 28 BATT MAIN 3 Fuse 40A R/DEFOG Relay 29 FAN 1 Fuse 30A FAN 1 Relay 30 BATT MAIN 4 Fuse 30A Blower Motor Control Module 31 ABS MTR Fuse 40A Electronic Brake Control Module (EBCM) (JL9) 32 FAN 2 Fuse 30A FAN 2 Relay, FAN 3 Relay 33 STARTER Fuse 40A CRANK Relay 34 HI BEAM Relay - LF HI BEAM and RF HI BEAM Fuses 35 HDM BEAM Relay - LF LO BEAM and RF LO BEAM Fuses 36 FOG LP Relay - Fog Lamp - Left Front and Fog Lamp - Right Front 37 IGN 1 Relay - ABS, TRANS SOL, PCM, SIR and DISPLAY Fuses, and A/C COMP Relay 38 A/C COMP Relay - A/C Compressor Clutch and A/C CLU Diode 39 HORN Relay - Horn Assembly 40 P/TRAIN Relay - ELEK IGN, EMISSION, ETC, FUEL INJ, and O2 SSR Fuses 41 FUEL PP Relay - Fuel Pump and Sender Assembly 42 FAN 1 Relay - Engine Cooling Fan - Left 43 FAN 3 Relay - Engine Cooling Fan - Right 44 WIPER HI Relay - Windshield Wiper Motor 45 WIPER Relay - WIPER HI Relay 46 FAN 2 Relay - Engine Cooling Fan - Right 48 CRANK Relay - Starter Motor 49 FUSE PULLER - - - A/C CLU Diode - Ground
Buick LaCrosse CX 2009 - Underhood Fuse Block (LS4 - 5.3L)
Buick LaCrosse CX 2009 Fuse Block - Underhood (LS4 - 5.3L)
Device Rating Description ABS Fuse 10A Steering Angle Sensor (JL4), Yaw and Lateral Accelerometer Sensor (JL4) and Electronic Brake Control Module (EBCM) ABS MTR Fuse 40A Electronic Brake Control Module (EBCM) ABS SOL Fuse 25A Electronic Brake Control Module (EBCM) A/C CMPRSR Fuse 10A A/C Compressor Clutch AIRBAG/DISPLAY Fuse 10A Inflatable Restraint Sensing and Diagnostic Module (SDM), Inflatable Restraint Passenger Air Bag On/Off Indicator, Inflatable Restraint Passenger Presence System (PPS) Module AUX PWR Fuse 25A Accessory Power Outlet and Cigar Lighter BATT 1 Fuse 50A PRK/LAMP, CHMSL/BKUP, INT/ILLUM, RFA/MOD, RDO/AMP, ONSTAR/ALDL, HVAC, CLSTRand CNSTR Fuses BATT 2 Fuse 50A HTD/SEAT, PWR/MIR, HAZRD and DR/LCK TRUNK Fuses, PWR/SEAT Circuit Breaker and RAP Relay BATT 3 Fuse 40A R/DEFOG Relay BATT 4 Fuse 30A Blower Motor Control Module COMPASS Fuse 10A Electronic Compass Module (U68), Rear Object Sensor Control Module, CRUISE Fuse, Air Temperature Sensor - Inside (CJ2) ECM IGN Fuse 10A STRTR Relay and Engine Control Module (ECM) ECM/TCM Fuse 15A Engine Control Module (ECM) and Transmission Control Module (TCM) EMISSIONS 1 Fuse 15A Heated Oxygen Sensor (HO2S) 1 and Heated Oxygen Sensor (HO2S) 2 and Evaporative Emissions (EVAP) Canister Purge Solenoid Valve EMISSIONS 2 Fuse 15A Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor, A/C CMPRSR Relay and Valve Lifter Oil Manifold (VLOM) Assembly ETC/ECM Fuse 15A Engine Control Module (ECM) FAN 1 Fuse 30A FAN 1 Relay FAN 2 Fuse 30A FAN 3 Relay FOG LAMPS Fuse 10A Fog Lamp - Left Front and Fog Lamp - Right Front FUEL/PUMP Fuse 15A Fuel Pump and Sender Assembly HORN Fuse 15A Horn Assembly HVAC Fuse 10A HVAC Control Module INJ 1 Fuse 20A Ignition Coil 1, Ignition Coil 3, Ignition Coil 5, Ignition Coil 7, Fuel Injector 1, Fuel Injector 2, Fuel Injector 7, Fuel Injector 8 INJ 2 Fuse 20A Ignition Coi 2, Ignition Coil 4, Ignition Coil 6, Ignition Coil 8, Fuel Injector 3, Fuel Injector 4, Fuel Injector 5, Fuel Injector 6 LT HI BEAM Fuse 10A Headlamp - Left High Beam LT LO BEAM Fuse 10A Headlamp - Left Low Beam RT HI BEAM Fuse 10A Headlamp - Right High Beam RT LO BEAM Fuse 10A Headlamp - Right Low Beam STRTR Fuse 40A Starter Motor TRANS Fuse 10A Torque Converter Clutch (TCC) Solenoid Valve, 1-2 Shift Solenoid (SS) Valve and 2-3 Shift Solenoid (SS) Valve and Transmission Control module (TCM) WPR Fuse 25A Wiper PCB Relay WSW/RVC Fuse 15A Body Control module (BCM) A/C CMPRSR Relay - A/C CMPRSR Fuse FAN 1 Relay - Engine Cooling Fan - Left FAN 2 Relay - Engine Cooling Fan - Right FAN 3 Relay - Engine Cooling Fan - Right FUEL/PUMP Relay - FUEL/PUMP Fuse HDM - LT LO BEAM and RT LO BEAM Fuses PWR/TRN Relay - ETC/ECM, INJ 1, INJ 2, EMISSIONS 1, and EMISSIONS 2 Fuses STRTR Relay - STRTR Fuse
IMPORTANT: Relays below are non-serviceable printed circuit board (PCB) relays, and are internal to the fuse block FOG LPS PCB Relay - FOG LAMPS Fuse HIGH BEAM PCB Relay - LT HI BEAM, and RT HI BEAM Fuse HORN PCB Relay - HORN Fuse IGNITION MAIN PCB Relay - ABS, TRANS, HVAC, AIR BAG/DISPLAY, COMPASS, ECM IGN Fuse WIPER PCB Relay - Ground WIPER HI PCB Relay - Windshield Wiper Motor