Buick LaCrosse II (2009-2013) body control module (left side of dash) Wiring diagrams

7 2 TRUNK LP CTRL INADVERTENT PWR CTRL BATT POS VOLT BLK WIRE BLOCK, LEFT TAIL LAMP) BODY CONTROL MODULE (LEFT SIDE OF DASH) CENTER CONSOLE COMPARTMENT CENTER CONSOLE COMPARTMENT LAMP COMPUTER DATA LINES SYSTEM COURTESY LAMP COURTESY LP SW SIG CRUISE CONTROL, SOUND SYSTEMS DIMMER SWITCH DRIVER DOOR COURTESY PASSENGER DOOR COURTESY FOG LAMP SWITCH FRONT DOME/ READING LAMPS FUSE FUSE GRN/GRY WIRE GRN/YEL WIRE GRY WIRE GRY/LT GRN WIRE HEADLAMP SWITCH HOT AT ALL TIMES INSTRUMENT ILLUMINATION CIRCUIT INSTRUMENT PANEL COMPARTMENT LAMP INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT FUSE SIDE OF DASH) INTR LP CTRL INTR LP DEFEAT SW SIG LAMP LAMP LAMP LAMP SWITCH LED AMBIENT LIGHTING CTRL LEFT REAR DOOR COURTESY LEFT SUNSHADE MIRROR LIFT GATE AJAR SW SIG LIGHTING CTRL SW SIG LIGHTING CTRL SW REF LT GRN/GRY WIRE NETWORK BUS 3 NETWORK BUS 4 ORG/ WIRE READING LAMPS REAR COMPARTMENT COURTESY LAMP REAR COMPARTMENT LID LATCH (IN TRUNK LID) RED WIRE RED/BRN WIRE RED/DK GRN WIRE RED/LT GRN WIRE RIGHT INSTRUMENT PANEL RIGHT REAR DOOR COURTESY RIGHT SUNSHADE MIRROR LAMP VIO/BRN WIRE VIO/GRY WIRE WHT WIRE WHT/BRN WIRE WHT/YEL WIRE YEL WIRE

BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRN WIRE FUSE GROUND GRY WIRE HEATED STEERING WHEEL ON IND HEATED STEERING WHEEL SWITCH HOT AT ALL TIMES HTD WHL FUSE IGN 3 VOLT IGNITION LOGIC RADIO/HVAC CONTROLS REAR BODY FUSE BLOCK (ON LEFT REAR WHEELHOUSE) RED WIRE RED/WHT WIRE RELAY RUN RLY COIL CTRL RUN WIRE SENSOR SIG STEERING COLUMN FUSE HOLDER STEERING WHEEL AIR BAG COIL STEERING WHEEL HEATER STEERING WHEEL HEATING CONTROL MODULE (INSIDE STEERING WHEEL) SW LED CTRL SW SIG VIO WIRE VIO/BRN WIRE VOLT REF YEL WIRE

BATTERY FUSE BLOCK (TOP OF BATTERY) BLK WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRN/GRY WIRE BRN/WHT WIRE FUSE GROUND DISTRIBUTION SYSTEM GROUND DISTRIBUTION SYSTEM PNK WIRE HORN ASSEMBLY (RIGHT FRONT OF VEHICLE) HORN RELAY HORN RLY CTRL HORN SW SIG HORN SWITCH HOT AT ALL TIMES LT GRN WIRE NCA WIRE PNK PNK WIRE PNK WIRE RED WIRE RIGHT STEERING WHEEL CONTROLS SWITCH STEERING WHEEL AIR BAG COIL UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY)

1 2 3 4 IGN GND NETWORK BUS 2 1 2 NETWORK BUS 4 RR DOOR AJAR SW SIG 2 1 LR DOOR AJAR SW SIG NETWORK BUS 4 6 NETWORK BUS 3 RF DOOR AJAR SW SIG 6 4 LF DOOR AJAR SW SIG NETWORK BUS 4 9 5 NETWORK BUS 2 BLK WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRAKE FLUID LEVEL SWITCH (ON BRAKE FLUID RESERVOIR) BRN WIRE COMPASS MODULE (W/O ON STAR) COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM 5986 333 DK BLU WIRE DK BLU/BLK WIRE DK BLU/VIO WIRE DRIVER DOOR LATCH ASSEMBLY DRIVER WINDOW MOTOR (DRIVER'S DOOR) ELECTRONIC BRAKE CONTROL MODULE (LEFT SIDE OF ENGINE COMPT) GRN/BLU WIRE GRN/GRY WIRE GRN/YEL WIRE GRY WIRE GRY/RED WIRE GRY/VIO WIRE LEFT REAR DOOR LATCH ASSEMBLY LEFT REAR WINDOW SWITCH LIFT GATE AJAR SW SIG 1 GMLAN DATA BUS LOGIC LT BLU WIRE LT GRN/GRY WIRE NETWORK BUS 2 PARK BRAKE CONTROL SWITCH PARK BRK RELEASE SW SIG PARK BRK SW SIG PARKING BRAKE CONTROL MODULE (BEHIND LEFT REAR WHEEL LINER) PASSENGER DOOR LATCH ASSEMBLY PASSENGER WINDOW MOTOR POWER DISTRIBUTION SYSTEM PRESS BRAKE REAR COMPARTMENT LID LATCH (IN TRUNK LID) RED/WHT WIRE RIGHT REAR DOOR LATCH ASSEMBLY RIGHT REAR WINDOW SWITCH RLY COIL CTRL RUN RLY COIL SERIAL DATA BRK FLUID LVL SERIAL DATA RLY COIL CTRL TRANSMISSION SHIFT LEVER POSITION INDICATOR VIO/GRY WIRE VIO/YEL WIRE VOL REF PARK BRK SPLY VOLT WHT WIRE WHT/DK BLU WIRE YEL WIRE YEL/RED WIRE

22 1 SERIAL DATA BATT POS VOLT AIR BAG COIL AUTO BLK WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRN WIRE COMPUTER DATA LINES SYSTEM CRUISE CONTROL, SOUND SYSTEMS DIMMER SWITCH DOME/ READING LAMPS FOG LAMP SWITCH FRONT DOME/ READING LAMPS FUSE GARAGE DOOR OPENER GRN WIRE HDLP SW PARK LP SIG HEAD HEADLAMP SWITCH HEADUP DISPLAY SWITCH (IF EQUIPPED) HORN SWITCH HOT AT ALL TIMES IGNITION MODE SWITCH INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT SIDE OF DASH) INSTRUMENT PANEL MULTI-FUNCTION SWITCH 1 INSTRUMENT PANEL MULTI-FUNCTION SWITCH 2 LED BACK LEFT STEERING WHEEL CONTROLS SWITCH LIGHT CTRL SW REF LIGHT CTRL SW SIG LIGHT DIMMING CONTROL LT GRN WIRE OFF OUTSIDE REARVIEW MIRROR SWITCH PARK PARK BRAKE CONTROL SWITCH (ON PARK BRAKE ASSEMBLY) PASSENGER WINDOW SWITCH PNK WIRE RED/WHT WIRE RIGHT STEERING WHEEL CONTROLS SWITCH SERIAL DATA LOGIC STEERING WHEEL) SUNROOF SUNSHADE SWITCH SUNROOF SWITCH WHT WIRE YEL WIRE

14 18 SEAT SW SIG (1) GMLAN SERIAL DATA BLK WIRE BLK/BRN WIRE BLK/GRN WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRN WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/RED WIRE DK BLU/WHT WIRE DK BLU/YEL WIRE DOWN DRIVER OUTSIDE REARVIEW MIRROR DRIVER SEAT MEMORY SWITCH FUSE GRN/BLK WIRE GRN/BLU WIRE GRN/WHT WIRE GRN/YEL WIRE GROUND GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/GRN WIRE GRY/LT GRN WIRE GRY/RED WIRE GRY/YEL WIRE HOT AT ALL TIMES LAMP SUPPLY VOLT LEFT LOGIC LOGIC PASSENGER WINDOW SWITCH LOW REF LT GRN WIRE LT GRN/BLK WIRE LT GRN/VIO WIRE LT GRN/WHT WIRE MEM MOTOR COMM NAVIGATION SYSTEM NETWORK BUS 8 OUTSIDE REARVIEW MIRROR SWITCH PASSENGER PASSENGER OUTSIDE REARVIEW MIRROR POSITION CTRL POSITIVE VOLT PPL PPL SENS SIG RED/VIO WIRE RIGHT SEAT MEMORY CONTROL MODULE (UNDER DRIVER'S SEAT) SENS SIG SET SIG UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO/GRY WIRE VIO/WHT WIRE YEL/BRN WIRE YEL/VIO WIRE

1 2 3 4 5 6 7 8 9 10 11 12 B+ SUPLY VOLT 1 2 3 4 5 6 7 8 LEFT REAR CORNER OBJECT SENSOR LEFT REAR MIDDLE OBJECT SENSOR 5060 2350 2555 COMPUTER DATA LINES SYSTEM BLK WIRE BLK/GRY WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRN WIRE BRN/WHT WIRE DIM CTRL DK GRN WIRE FUSE GRN WIRE GRY WIRE HOT AT ALL TIMES I/P MULTI-FUNCTION SWITCH LEFT MIDDLE REAR OBJECT SENSOR (LEFT SIDE OF REAR BUMPER) LEFT OUTER REAR OBJECT SENSOR (LEFT SIDE OF REAR BUMPER) LOW REFERENCE LOW SPEED GMLAN SERIAL DATA GROUND REAR PARK ASSIST DISABLE SIGNAL LT GRN WIRE PARKING ASSIST CONTROL MODULE (CENTER OF REAR PACKAGE SHELF) POWER DISTRIBUTION SYSTEM RED/LT GRN WIRE RIGHT MIDDLE REAR OBJECT SENSOR (RIGHT SIDE OF REAR BUMPER) RIGHT OUTER REAR OBJECT SENSOR UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) WHT WIRE YEL WIRE YEL/DK BLU WIRE YEL/VIO WIRE YEL/WHT WIRE

18 12 RR STATUS SIG LR STATUS SIG 25 27 16 RCDLR POWER RCDLR DATA TRANSMIT RCDLR GROUND 3 4 19 15 POS VOLT POS VOLT LOCK SIG UNLOCK SIG 4 1 UNLOCK CTRL LOCK CTRL 2 4 6 NETWORK BUS 3 AJAR SW SIG AJAR SW SIG 1 AMBIENT LIGHT/ SUNLOAD SENSOR (CENTER OF DASH) BLK WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRN WIRE BRN/LT GRN WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/VIO WIRE DK BLU/WHT WIRE DRIVER DOOR LATCH ASSEMBLY DRIVER WINDOW MOTOR (DRIVER'S DOOR) DRIVER WINDOW SWITCH FUSE GRN WIRE GRN/GRY WIRE GRN/YEL WIRE GRY WIRE GRY/LT GRN WIRE GRY/WHT WIRE HOOD AJAR SW SIG HOOD AJAR SWITCH (FRONT OF ENGINE COMPT) HOT AT ALL TIMES HVAC CONTROL MODULE INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT SIDE OF DASH) FUSE INSTRUMENT PANEL MULTI-FUNCTION SWITCH 1 LOCK CTRL 2 LOCK RELAY CTRL NETWORK BUS 3 NETWORK BUS 4 PASSENGER DOOR LATCH ASSEMBLY PPL RCDLR DATA RECEIVE RED WIRE RED/VIO WIRE SECURITY IND CTRL STATUS CTRL UNLOCK SIG VIO/GRY WIRE VIO/YEL WIRE WHT/VIO WIRE YEL WIRE YEL/LT GRN WIRE

BLK WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRN WIRE DEFOGGER SYSTEM DK BLU WIRE DRIVER OUTSIDE REARVIEW MIRROR DRIVER PASSENGER ELECTROCHROMIC MIRROR CIRCUIT EXTERIOR LIGHTS DEFOGGER SYSTEM SYSTEM FUSE OF BATTERY) GRY WIRE GRY/LT GRN WIRE HOT AT ALL TIMES LT GRN WIRE MIRROR DIMMING NAVIGATION SYSTEM OUTSIDE REARVIEW MIRROR SWITCH PASSENGER DRIVER PASSENGER OUTSIDE REARVIEW MIRROR RED WIRE SPLICE PACK UNDERHOOD FUSE BLOCK (LEFT SIDE VIO WIRE WHT WIRE YEL WIRE

5 15 CAMERA SIG - CAMERA SIG + BLK WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) DK BLU WIRE DK GRN/WHT WIRE FUSE GRY WIRE GRY/YEL WIRE HOT W/ IGNITION MAIN RELAY ENERGIZED IGN 1 VOLT GROUND CAMERA SIG - LAMP RLY CTRL LT GRN WIRE LT GRN/WHT WIRE NCA WIRE RADIO REARVIEW CAMERA RED WIRE SHIELD EXT CAMERA SIG + UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO WIRE VIO/BLK WIRE WHT WIRE WHT/DK BLU WIRE