Buick LaCrosse I (2004-2009) (left side of front end upper tie bar, in back of headlamp) Wiring diagrams

30 48 43 STOP LAMP SW SIG RR STOP/TURN VOLT LR STOP/TURN VOLT 8 16 17 4 PARK LAMP ON SIG HAZARD SW SIG RIGHT TURN SW SIG LEFT TURN SW SIG ANTI-LOCK BRAKES, ENGINE CONTROLS SYSTEM ANTI-LOCK BRAKES, ENGINE CONTROLS, TRANSMISSIONS SYSTEMS BCM CLASS 2 SERIAL DATA BCM CLASS 2 SERIAL DATA IGN BLK WIRE BLK/WHT WIRE BLU WIRE BODY CONTROL MODULE (BCM) (BELOW LEFT SIDE OF DASH, LEFT OF STEERING COLUMN) BRN WIRE BRN/WHT WIRE CENTER HIGH MOUNTED STOP LAMP (CHMSL) CHMSL/ BKUP FUSE COMPUTER DATA LINES SYSTEM DK BLU/WHT WIRE DK GRN WIRE DK LT DRIVER INFORMATION CENTER GRY WIRE HAZARD HAZRD FUSE HEAD HOT AT ALL TIMES HOT AT ALL TIMES I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH) IGN INSTRUMENT PANEL CLUSTER (IPC) IPC CLASS 2 SERIAL DATA LAMP SWITCH ASSEMBLY LEFT LEFT FRONT MARKER LAMP LEFT FRONT PARK/ TURN SIGNAL LAMP LEFT LICENSE LAMP LEFT TAIL/ STOP, TURN SIGNAL LAMP LEFT REAR LEFT TURN INDICATOR LOGIC LOWER UPPER LEFT LEFT TAIL LAMP TAIL LAMP LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE MARKER LAMP ORG/ WIRE PARK AUTO OFF PRK LAMP FUSE PRK LAMP RELAY RIGHT RIGHT FRONT MARKER LAMP RIGHT FRONT PARK/ TURN SIGNAL LAMP RIGHT LICENSE LAMP RIGHT REAR RIGHT TAIL/ STOP, TURN SIGNAL LAMP LOWER RIGHT TAIL LAMP UPPER RIGHT TAIL LAMP RIGHT TURN INDICATOR SPLICE PACK TAN WIRE TURN AUDIBLE INDICATOR TURN SIGNAL/ MULTI-FUNCTION SWITCH WHT WIRE YEL WIRE

3.6L 3.8L A/C CLU DIODE A/C COMPRESSOR CLUTCH A/C WIPER RELAY 37 RELAY 45 AUTOMATIC TRANSMISSION TRANSMISSION CLUTCH INTERNAL MODE DIODE SWITCH (IMS) BATTERY BLK WIRE BODY CONTROL MODULE (BCM) ELECTRONIC BRAKE CONTROL MODULE (EBCM) EXCEPT SULEV FUEL PP RELAY 41 HEADLAMP ASSEMBLY) HOOD AJAR SWITCH HORN ASSEMBLY IGN 1 HDM BEAM MODULE 35 IGN 1 HDM BEAM RELAY 37 MODULE 35 LAMP LEFT FRONT MARKER LAMP LEFT HIGH BEAM HEADLAMP POWERTRAIN CONTROL MODULE (PCM) RIGHT COOLING FAN RIGHT FRONT MARKER LAMP RIGHT FRONT PARK/ RIGHT TURN FRONT SIGNAL FOG LAMP LAMP RIGHT HIGH BEAM HEADLAMP SECONDARY AIR INJECTION (AIR) PUMP (SULEV) SULEV TAN WIRE THROTTLE ACTUATOR CONTROL (TAC) MODULE TRANSMISSION CONTROL MODULE (TCM) FUEL PP RELAY 41 WHT WIRE WINDSHIELD WASHER FLUID LEVEL SWITCH WINDSHIELD WASHER FLUID PUMP

3.6L 3.8L AMBIENT SUNLOAD LIGHT SENSOR SENSOR ASSEMBLY (TOP OF (TOP CENTER OF DASH) DASH) AUTO PARK BCM BCM CLASS 2 SERIAL BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND LEFT SIDE OF DASH, LEFT OF STEERING COLUMN) BRN WIRE CLSTR FUSE COMPUTER DATA LINES SYSTEM DK GRN WIRE DK GRN/WHT WIRE DRL AMBIENT LIGHT EXTERIOR LAMPS OFF FLASH TO PASS SW FOG FOG LAMP IND FOG LAMP RELAY CTRL FOG LP RELAY 36 FOG LPS FUSE 7 FRONT FOG LAMP SW FTP GRY WIRE HDLP SUGGEST IND HDM BEAM MODULE 35 HEAD HEADLAMP MOD CTRL HEADLAMP ON SIG HI BEAM RELAY 34 HI BEAM RLY CTRL HIGH BEAM IND HOT AT ALL TIMES I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH) IGN IGN B+ INSTRUMENT PANEL CLUSTER (IPC) LAMP SWITCH ASSEMBLY LEFT FRONT FOG LAMP LEFT HIGH BEAM HEADLAMP LEFT LOW BEAM HEADLAMP LF HI BEAM FUSE 1 LF LO BEAM FUSE 3 LOGIC LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE MANUAL AUTO A/C A/C OFF ORG/ WIRE PNK WIRE PNK/WHT WIRE PPL PPL HEADLAMP DIMMER SW RF HI BEAM FUSE 2 RF LO BEAM FUSE 4 RIGHT FRONT FOG LAMP RIGHT HEADLAMP ON FRAME) RIGHT HIGH BEAM HEADLAMP RIGHT LOW BEAM HEADLAMP SERIAL DATA TAN WIRE TURN SIGNAL/ MULTIFUNCTION SWITCH UNDERHOOD FUSE BLOCK (MOUNTED TO RIGHT STRUT TOWER) 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