Buick LaCrosse I (2004-2009) batt main 4 fuse 30 Wiring diagrams

23 7 ECT SENS SIG LOW REF 9 39 25 4 20 48 49 A/C PRESS SIGNAL A/C REFRIGERANT PRESSURE SENSOR (ON LEFT SIDE OF ENGINE COMPT, ON ACCUMULATOR) BATT MAIN 4 FUSE 30 BLK WIRE BLK/WHT WIRE BLOWER MOTOR (BEHIND RIGHT BLOWER MOTOR CONTROL PROCESSOR (ON LOWER RIGHT SIDE OF DASH) BRN WIRE COMPUTER DATA LINES SYSTEM DISPLAY FUSE 18 DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (ECM) (TOP OF ENGINE) ENGINE CONTROLS SYSTEM GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT AT ALL TIMES I/P FUSE BLOCK HVAC FUSE (BEHIND RIGHT SIDE OF DASH) HOT IN RUN OR START IGN 1 VOLT INSIDE AIR TEMPERATURE SENSOR (LEFT SIDE OF DASH, ON RIGHT OF STEERING COLUMN) LEFT COOLING FAN MOTOR LOW REF RELAY CTRL RELAY CTRL CLASS 2 SERIAL A/C COMP CLUTCH LT BLU WIRE LT BLU/BLK WIRE ORG/ WIRE PNK WIRE PPL PPL SUPPLY GND BATTERY SPEED CTRL GND RED WIRE RED/BLK WIRE RIGHT COOLING FAN MOTOR RIGHT STRUT TOWER) SIDE OF DASH, IN HVAC MODULE) SUNLOAD SENSOR ASSEMBLY (TOP CENTER OF DASH) TAN WIRE UNDERHOOD FUSE BLOCK (MOUNTED TO UPPER LEFT AIR TEMPERATURE SENSOR (CENTER OF DASH, IN LEFT VENTILATION DUCT) UPPER RIGHT AIR TEMPERATURE SENSOR (CENTER OF DASH, IN RIGHT VENTILATION DUCT) WHT WIRE YEL WIRE

12 13 14 15 16 PPL 31 4 7 50 48 15 33 A/C PRESS SIGNAL 55 29 ECT SENS SIG LOW REF A/C REFRIGERANT PRESSURE SENSOR (ON LEFT SIDE OF ENGINE COMPT, BATT MAIN 4 FUSE 30 BLK WIRE BLK/WHT WIRE BLOWER MOTOR (BEHIND RIGHT BLOWER MOTOR CONTROL PROCESSOR (ON LOWER RIGHT SIDE OF DASH) BRN WIRE COMPUTER DATA LINES SYSTEM DISPLAY FUSE 18 DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE COOLANT TEMPERATURE (ECT) SENSOR (ON TOP RIGHT OF INTAKE MANIFOLD) GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT AT ALL TIMES I/P FUSE BLOCK HVAC FUSE (BEHIND RIGHT SIDE OF DASH) HOT IN RUN OR START IGN 1 VOLT INSIDE AIR TEMPERATURE SENSOR (LEFT SIDE OF DASH, ON RIGHT OF STEERING COLUMN) LEFT COOLING FAN MOTOR LOW REF RELAY CTRL RELAY CTRL CLASS 2 SERIAL A/C COMP CLUTCH LT BLU WIRE LT BLU/BLK WIRE ON ACCUMULATOR) ORG/ WIRE PNK WIRE PPL PPL SUPPLY GND BATTERY SPEED CTRL GND RED WIRE RED/BLK WIRE RIGHT COOLING FAN MOTOR RIGHT STRUT TOWER) SIDE OF DASH, IN HVAC MODULE) SUNLOAD SENSOR ASSEMBLY (TOP CENTER OF DASH) TAN WIRE UNDERHOOD FUSE BLOCK (MOUNTED TO UPPER LEFT AIR TEMPERATURE SENSOR (CENTER OF DASH, IN LEFT VENTILATION DUCT) UPPER RIGHT AIR TEMPERATURE SENSOR (CENTER OF DASH, IN RIGHT VENTILATION DUCT) WHT WIRE YEL WIRE

380 2700 2751 473 335 1049 31 4 7 50 48 15 33 A/C PRESS SIGNAL 55 29 410 2761 ECT SENS SIG LOW REF A/C CLU DIODE A/C CLUTCH FUSE 13 A/C COMP RELAY A/C REFRIGERANT PRESSURE SENSOR (ON LEFT SIDE OF ENGINE COMPT, ON ACCUMULATOR) A/C REQUEST IND A/C REQUEST SWITCH AIR TEMP B AIR TEMP A RECIRCULATION B RECIRCULATION A AIR TEMPERATURE ACTUATOR (RIGHT SIDE OF HVAC ASSEMBLY) BATT MAIN 4 FUSE 30 BATTERY IGNITION 1 BLK WIRE BLK/WHT WIRE BLOWER MOTOR (BEHIND RIGHT SIDE OF DASH, IN HVAC MODULE) BLOWER MOTOR CONTROL PROCESSOR (ON LOWER RIGHT SIDE OF DASH) BREAKOUT TO DATA LINK CONNECTOR TOWARDS BRAKE PEDAL POSITION SENSOR) CLASS 2 SERIAL COMPUTER DATA LINES SYSTEM DEFOGGER IND REAR DEFOGGER SWITCH DISPLAY FUSE 18 DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE COOLANT TEMPERATURE (ECT) SENSOR (ON TOP RIGHT OF INTAKE MANIFOLD) FAN 1 FUSE 29 FAN 1 RELAY 42 FAN 2 FUSE 32 FAN 2 RELAY 46 FAN 3 RELAY 43 GROUND GRY WIRE GRY/BLK WIRE HARNESS, APPROXI- MATELY 20 CM FROM HIGH LOW HOT AT ALL TIMES HOT AT ALL TIMES I/P FUSE BLOCK HVAC FUSE (BEHIND RIGHT SIDE OF DASH) HOT IN RUN OR START HVAC CONTROL MODULE (CENTER OF DASH) ILLUM ILLUM INTERIOR 8 1450 LIGHTS SYSTEM LEFT COOLING FAN MOTOR (ON LEFT SIDE OF RADIATOR) LOGIC LOW REF HIGH SPD COOLING LOW SPD COOLING CLASS 2 SERIAL A/C COMP CLUTCH LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE MODE ACTUATOR (LOWER LEFT SIDE OF HVAC ASSEMBLY) MODE SWITCH OFF BLOWER MOTOR SW ORG/ WIRE PNK WIRE PNK/WHT WIRE PPL PPL SUPPLY GND BATTERY SPEED CTRL GND RECIRCULATION ACTUATOR (NEAR RIGHT "A" PILLAR, ON UPPER HVAC CASE) RECIRCULATION IND RECIRCULATION SWITCH RED WIRE RED/BLK WIRE RIGHT COOLING FAN MOTOR (ON RIGHT SIDE OF RADIATOR) RIGHT STRUT TOWER) SPEED CTRL MODE DOOR B MODE DOOR A TAN WIRE TEMPERATURE CONTROL SW TOWARDS BRAKE PEDAL POSITION SENSOR) UNDERHOOD FUSE BLOCK (MOUNTED TO WHT WIRE YEL WIRE

3.8L 3.6L ABS MTR FUSE 31 ABS SOL FUSE 19 AIR PUMP FUSE 25 AUTOMATIC A/C MANUAL A/C BATT MAIN 1 FUSE 26 BATT MAIN 2 FUSE 27 BATT MAIN 3 FUSE 28 BATT MAIN 4 FUSE 30 BATTERY BLK WIRE BLK/WHT WIRE BLOWER MOTOR CONTROL PROCESSOR BODY CONTROL MODULE (BCM) CANISTER FUSE PRK/ SWITCH FUSE CHMSL/ BKUP FUSE INT ILLUM FUSE CLSTR FUSE DATA LINK CONNECTOR (DLC) DIGITAL RADIO RECEIVER DR/LCK TRUNK FUSE RAP RELAY DRIVER DRIVER SEAT SEAT ADJUSTER LUMBAR SWITCH SWITCH DRIVER PASSENGER HEATED HEATED SEAT RELAY SEAT RELAY (IF EQUIPPED) (IF EQUIPPED) DRIVER WINDOW SWITCH ELECTRONIC BRAKE CONTROL MODULE (EBCM) (W/ ABS) EVAPORATIVE PARK EMISSION SWITCH (EVAP) CANISTER VENT SOLENOID FRONT PASSENGER WINDOW SWITCH FUSIBLE LINK (8 GA- GENERATOR HAZRD FUSE HTD SEAT FUSE HVAC CONTROL MODULE HVAC FUSE I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH) INFLATABLE RESTRAINT FRONT PASSENGER PRESENCE SYSTEM (PPS) MODULE INSIDE SUNROOF REARVIEW MOTOR MIRROR NCA WIRE ONSTAR/ ALDL FUSE ORG/ WIRE OUTSIDE REAR VIEW MIRROR SWITCH PASSENGER SEAT ADJUSTER SWITCH (IF EQUIPPED) PCM/ ETC FUSE 16 POWERTRAIN ENGINE CONTROL CONTROL MODULE MODULE (PCM) (ECM) PRK LAMP RELAY PRK/LAMP FUSE PWR SEAT CIRCUIT BREAKER PWR WNDW CIRCUIT BREAKER PWR/ MIR FUSE R/ DEFOG RELAY RADIO AUDIO AMPLIFIER (W/ 9 SPEAKER SYSTEM) RDO AMP FUSE RED WIRE RFA/ MOD FUSE S/ROOF FUSE SECONDARY AIR INJECTION (AIR) PUMP RELAY (W/ CALIFORNIA PZEV EMISSION SYSTEM) STARTER TO TCM FUSE 8 VEHICLE COMMUNICATION INTERFACE MODULE (VCIM) (IF EQUIPPED) W/ DIGITAL AUDIO SYSTEM W/ DRIVER POWER LUMBAR CONTROL SEAT W/ SUNROOF W/ VEHICLE COMMUNICATION SYSTEM W/O DIGITAL AUDIO SYSTEM W/O DRIVER POWER LUMBAR CONTROL SEAT W/O SUNROOF WASHER/ RVC FUSE 6 WHT WIRE YEL WIRE