Buick LaCrosse I (2004-2009) hot w/ ign 1 relay energized Wiring diagrams

15 21 PCM CLASS 2 SER DATA ENG SPEED SIG 3.6L 3.6L W/ ACTIVE BRAKE CONTROL 3.8L 48 15 5 37 ECM CLASS 2 SER DATA REQ TORQUE SIG ENG SPEED SIG DEL TORQUE SIG ABS FUSE 23 ABS MTR FUSE 31 ABS SOL FUSE 19 B+ MOTOR CONTROL B+ SOL VALVE CONTROL BLK WIRE BLK/WHT WIRE BRAKE PRESSURE MODULATOR VALVE (BPMV) BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE ENG SPEED SIG (3.8L) HI SPD GMLAN SER DATA - (3.6L) ENGINE CONTROL MODULE (3.6L) (TOP OF ENGINE) ENGINE CONTROLS SYSTEM GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT W/ IGN 1 RELAY ENERGIZED HSV 2 (W/ TCS) LEFT FRONT INLET LEFT FRONT OUTLET LEFT REAR OUTLET LT BLU WIRE MAGNASTEER ACTUATOR (ON STEERING RACK ASSEMBLY) ORG/ WIRE ORG/BLK WIRE PNK PNK WIRE PNK WIRE PUMP MOTOR RED WIRE RIGHT FRONT INLET RIGHT LEFT FRONT REAR INLET OUTLET RIGHT REAR INLET RIGHT USV 1 (W/ TCS) REAR (W/ TCS) OUTLET SOLENOID VALVES TAN WIRE TAN/BLK WIRE TAN/WHT WIRE UNDERHOOD FUSE BLOCK (MOUNTED TO RIGHT STRUT TOWER) USV 2 (W/ TCS) W/ ACTIVE BRAKE CONTROL W/ TRACTION CONTROL W/O ACTIVE BRAKE CONTROL WHT WIRE YEL WIRE

ABS INDICATOR ABS/TCS CLASS 2 SERIAL DATA AIR BAG INDICATOR AMBIENT AIR TEMPERATURE SENSOR BASE BCM CLASS 2 SERIAL DATA BLK WIRE BLK/WHT WIRE BRAKE FLUID LEVEL SWITCH (CENTER OF BRAKE FLUID RESERVOIR) DEFOGGER SYSTEM BRAKE INDICATOR BRN WIRE BRN/WHT WIRE CHARGING INDICATOR COMPASS SENS FEED COMPASS SENS RET COMPUTER DATA LINES SYSTEM CRUISE INDICATOR DISPLAY FUSE 18 DK BLU WIRE ECM/PCM CLASS 2 SERIAL DATA ECM/PCM CLASS 2 SERIAL DATA IGN ELECTRONIC COMPASS MODULE (TOP RIGHT SIDE OF REAR PACKAGE SHELF) ENGINE CONTROLS SYSTEM ENGINE COOLANT TEMPERATURE GAGE ENGINE COOLANT TEMPERATURE INDICATOR ENGINE OIL LEVEL SWITCH (LOWER FRONT CENTER OF ENGINE OIL PAN) ENGINE OIL PRESSURE (EOP) SWITCH (BELOW POWER STEERING PUMP) FOG LAMPS INDICATOR FUEL GAGE GRY WIRE HIGH BEAM INDICATOR HOT AT ALL TIMES I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH) CLSTR FUSE HOT W/ IGN 1 RELAY ENERGIZED I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH) IGN IGN 1 VOLTAGE INSTRUMENT PANEL CLUSTER (IPC) IPC CLASS 2 SERIAL DATA IPC/BCM CLASS 2 SERIAL DATA KM/H INDICATOR LEFT TURN INDICATOR LOGIC LOW FUEL WARNING LAMP INDICATOR LOW TIRE PRESSURE INDICATOR LT GRN/BLK WIRE MALFUNCTION INDICATOR LAMP (MIL) MESSAGE REQUEST MPH INDICATOR ODO/TRIP OIL LEVEL INDICATOR LAMP ORG/ WIRE P R N D 3 2 1 PCM/ECM CLASS 2 SERIAL DATA PNK PPL WIRE PNK WIRE POWER DISTRIBUTION SYSTEM REAR DEFOG RLY CTRL RED WIRE RIGHT TURN INDICATOR SDM CLASS 2 SERIAL DATA SEAT BELT INDICATOR SPEEDOMETER SUPPLEMENTAL RESTRAINTS SYSTEM TACHOMETER TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TRACTION OFF INDICATOR TURN AUDIBLE INDICATOR UNDERHOOD FUSE BLOCK (MOUNTED TO RIGHT STRUT TOWER) WHT WIRE YEL WIRE

1 3 2 SENSOR SIGNAL SUPPLY VOLTAGE LOW REFERENCE 2 3 1 LOW REFERENCE SUPPLY VOLTAGE SENSOR SIGNAL BACKUP LAMP SPLY VOLTAGE REAR PARKING DIAGNOSTIC SIG BACKUP LAMP SUPPLY VOLTAGE BLK WIRE BODY CONTROL MODULE (BCM) (BEHIND LEFT SIDE OF DASH, LEFT OF STEERING COLUMN) CENTER AMBER IND CENTER AMBER IND CTRL LEFT AMBER IND CTRL CHIME CONTROL CHIME CONTROL TELLTALE ASSEMBLY SPLY VOLTAGE DISPLAY FUSE 18 DK BLU WIRE DK GRN WIRE ENGINE CONTROL MODULE (ECM) (3.6L) (TOP OF ENGINE) ENGINE CONTROLS SYSTEM GROUND IGN 1 VOLTAGE PNK WIRE GRY WIRE HOT W/ IGN 1 RELAY ENERGIZED I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH) IND LEFT AMBER IND LEFT REAR CORNER OBJECT SENSOR (LEFT SIDE OF REAR BUMPER) LEFT REAR MIDDLE OBJECT SENSOR (MIDDLE OF BUMPER) LT GRN WIRE ORG/ WIRE PNK PNK WIRE PNK WIRE POWER DISTRIBUTION SYSTEM REAR OBJECT SENSOR CONTROL MODULE (UNDER CENTER OF REAR WINDOW SHELF) REAR PARKING ASSIST (RPA) DIAGNOSTIC CONNECTOR (LEFT SIDE OF TRUNK) REAR PARKING ASSIST (RPA) DISPLAY RED IND CTRL WIRE RED WIRE RIGHT REAR CORNER OBJECT SENSOR (RIGHT SIDE OF REAR BUMPER) RIGHT REAR MIDDLE OBJECT SENSOR (MIDDLE OF REAR BUMPER) SPLICE PACK UNDERHOOD FUSE BLOCK (MOUNTED TO RIGHT STRUT TOWER) VEHICLE SPEED SIG VSS SIG WHT WIRE YEL WIRE

12 VOLT REF 3.8L 3.6L BATTERY BATTERY POSITIVE REMOTE STARTER DISABLED CLASS 2 SERIAL DATA BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND LEFT SIDE OF DASH, LEFT OF STEERING COLUMN) CLASS 2 SERIAL DATA CLSTR FUSE CRANK RELAY 48 CRANK VOLTAGE DK GRN WIRE GROUND DISTRIBUTION SYSTEM GRY WIRE HOLD- IN COIL HOOD AJAR SWITCH (W/ REMOTE KEYLESS ENTRY) (FRONT OF ENGINE COMPT) HOOD AJAR SWITCH SIG HOT AT ALL TIMES HOT W/ IGN 1 RELAY ENERGIZED I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH) IGNITION SWITCH INSTRUMENT PANEL CLUSTER (IPC) LOCK LOGIC LT GRN WIRE ORG/ WIRE PCM FUSE 15 PNK IGNITION 1 VOLTAGE WIRE PNK WIRE PNK/BLK WIRE POWER DISTRIBUTION SYSTEM PPL PULL- IN COIL RED WIRE RUN WIRE SPLICE PACK START ENABLE RLY CTRL STARTER STARTER FUSE 33 UNDERHOOD FUSE BLOCK (MOUNTED TO RIGHT STRUT TOWER) WHT/BLK WIRE YEL WIRE YEL/BLK WIRE