Buick LaCrosse II facelift (2013-2016) brn Wiring diagrams

12 VOLTAGE BRAKE FLUD LVL SENS SIG BRK VACUUM SW SIG SERIAL DATA- SERIAL DATA + 5 VOLT REF BLK WIRE BLK/BLU WIRE BLK/GRY WIRE BLK/VIO WIRE BLK/YEL WIRE BLU WIRE BLU/WHT WIRE BLU/YEL WIRE BRAKE BOOSTER PUMP MOTOR RELAY (RIGHT SIDE OF ENGINE COMPT) BRAKE FLUID LEVEL SWITCH (LEFT KICK (ON BRAKE FLUID PANEL) RESERVOIR) BRAKE PRESSURE MODULATOR BRAKE VACUUM SENS SIG WHL SPD SENS SIG LF LF WHL SPD SENS LOW REF BRN WIRE COMPUTER DATA LINES SYSTEM ELECTRONIC BRAKE CONTROL MODULE (LEFT SIDE OF ENGINE COMPT) FUSE FUSE 26 FUSE 41 GRN/BRN WIRE GRN/GRY WIRE GRY WIRE HOT AT ALL TIMES LEFT FRONT WHEEL SPEED SENSOR (LEFT FRONT STEERING KNUCKLE ASSEMBLY) LEFT REAR WHEEL SPEED SENSOR (LEFT REAR UPPER CONTROL ARM) LOW REFERENCE BATTERY + RED WIRE RED/BLU WIRE RED/GRY WIRE RED/YEL WIRE RIGHT FRONT WHEEL SPEED SENSOR SENS SIG RIGHT REAR LOW REF RIGHT REAR SERIAL DATA + SERIAL DATA - SERIAL DATA - SERIAL DATA + WHL SPD SENS SIG RF WHL SPD SENS LOW RF SERIAL DATA ENABLE WHL SPD SENS SIG LR WHL SPD SENS LOW REF LR UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO WIRE W/ CONTINUOUSLY VARIABLE REAL TIME DAMPING CHASSIS W/O CONTINUOUSLY VARIABLE REAL TIME DAMPING CHASSIS WHT WIRE WHT/BLU WIRE YEL WIRE YEL/RED WIRE YEL/VIO WIRE

2.4L 24 25 GMLAN SERL DATA (+) GMLAN SERL DATA (-) 3.6L 5 VOLT REF 7 13 SENS SIG SPLY VOLT ABS IND. BLK WIRE BLK/BRN WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/VIO WIRE BLU/YEL WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRAKE IND BRAKE PEDAL POSITION SENSOR (NEAR TOP OF ACCELERATOR BRN WIRE CENTER CONSOLE MULTI-FUNCTION SWITCH COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEMS DRIVER INFORMATION CENTER DISPLAY ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT) ESC OFF IND GRN WIRE GRN/BRN WIRE GRY WIRE GRY/RED WIRE HI SPD GMLAN HI SPD GMLAN SERIAL DATA HI SPD GMLAN SERIAL DATA (-) (2) HYBRID/EV BATTERY PACK (RIGHT SIDE OF LUGGAGE COMPT) HYBRID/EV POWERTRAIN CONTROL MODULE INSTRUMENT CLUSTER LOGIC LOW REF LT GRN/BLK WIRE PARK BRAKE CONTROL SWITCH (ON PARK BRAKE ASSEMBLY) PARKING BRAKE CONTROL MODULE (BEHIND LEFT REAR WHEEL LINER) PEDAL ASSEMBLY) SENS SIG SRL DATA BUS+ STEERING ANGLE SENSOR (BASE OF STEERING COLUMN) SUPPLY VOLT SUPPLY VOLTAGE SW SIG TCS/ ESC IND TRACTION CONTROL OFF IND TRACTION CONTROL SWITCH VIO WIRE WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/RED WIRE YEL WIRE YEL/RED WIRE

11 12 IG MODE SW CTRL LOW REF 3 4 ACC VOLT RUN/CRANK 1 VOLT 307 3287 HEADLIGHTS SYSTEM HORNS SYSTEM 664 94 EXTERIOR LIGHTS SYSTEM WIPER/WASHER SYSTEM ACC IND ACCESSORY LED SIGNAL LIGHTING CONTROL SW SIG AMBIENT LIGHT SENSOR SIGNAL SW SIG ANTI-LOCK BRAKES SYSTEM DOOR LOCKS, ANTI-THEFT SYSTEMS ANTI-LOCK BRAKES, CRUISE CONTROL SYSTEMS ANTI-THEFT SYSTEM HEADLIGHTS SYSTEM BATT RVC FUSE BATTERY POSITIVE VOLT BCM 1 BCM 4 BCM 2 FUSE FUSE FUSE BCM 3 FUSE BCM 6 FUSE BCM 7 FUSE (LOWER LEFT SIDE OF DASH) BCM 8 FUSE BLK WIRE BLK/BRN WIRE BLU WIRE BLU/YEL WIRE BRAKE APPLY SENSOR SIGNAL LED BACKLIGHT DIMMING CTRL BRN WIRE BRN/LT GRN WIRE BRN/WHT WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/BLK WIRE DK BLU/WHT WIRE DOOR LOCKS, ANTI-THEFT SYSTEMS DRIVER DR LK SW LOCK SIG EXTERIOR LIGHTS SYSTEM DOOR LOCKS, ANTI-THEFT SYSTEMS GRN WIRE GRN/GRY WIRE GRN/VIO WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE GRY/BLK WIRE GRY/LT GRN WIRE HAZARD SW TURN RIGHT SIG WINDSHIELD WASHER SW SIG HDLP SW FLASH TO PASS SIG HORN SWITCH SIGNAL HEADLAMP OFF SIG HEADLAMP SW ON SIG HAZARD LED DIMMING SIGNAL HEADLIGHTS SYSTEM HEADLIGHTS SYSTEM EXTERIOR LIGHTS SYSTEM HEADLIGHTS SYSTEM TRANSMISSIONS SYSTEM HEADLIGHTS, INTERIOR LIGHTS SYSTEMS HOT AT ALL TIMES IGNITION KEY RESISTOR SIG IGNITION MODE SWITCH INSTRUMENT PANEL FUSE BLOCK INTERIOR LAMP DEFEAT SW SIG KEYLESS ENTRY CONTROL MODULE (RIGHT KICK PANEL) OFF/RUN/CRANK VOLT RED WIRE RED/BLK WIRE RED/BRN WIRE RED/GRN WIRE RED/VIO WIRE RED/WHT WIRE RED/YEL WIRE SHIFT INTERLOCK SYSTEM START IND UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO WIRE VIO/BLK WIRE VIO/YEL WIRE W/ KEYLESS ENGINE START WHT WIRE WINDSHIELD WIPER SW HI SIG WIPER/WASHER SYSTEM YEL WIRE

BLU WIRE BLU/YEL WIRE BRN WIRE COMM ENABLE DATA COM ENABLE FRONTVIEW CAMERA MODULE (W/ LANE DEPARTURE WARNING, COLLISION ALERT) GRN WIRE GRN/VIO WIRE GRN/WHT WIRE GRY/VIO WIRE HS SERIAL DATA - HUMAN MACHINE INTERFACE CONTROL MODULE INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (BELOW CENTER CONSOLE) LEFT HEADLAMP BALLAST LEFT HEADLAMP ASSEMBLY LEFT HEADLAMP HORIZONTAL MOTOR LINEAR INTERCONNECT NETWORK BUS 6 MOST CTRL MOST SER DATA (+) MULTI-AXIS ACCELERATION SENSOR (UNDER CENTER CONSOLE BETWEEN FRONT SEATS) NETWORK BUS 1 NETWORK BUS 5 NETWORK BUS 6 ORG/ WIRE RIGHT HEADLAMP BALLAST RIGHT HEADLAMP ASSEMBLY RIGHT HEADLAMP HORIZONTAL MOTOR SER DATA SER DATA (-) (1) SER DATA COMM ENABLE SUNROOF CONTROL MODULE (BEHIND ROOF CONSOLE) SUNROOF SUNSHADE MOTOR MODULE (REAR OF SUNROOF) VIO/YEL WIRE W/ ADAPTIVE CRUISE CONTROL W/O ADAPTIVE CRUISE CONTROL WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/VIO WIRE

23 22 COMM ENABLE WAKEUP SERIAL DATA 23 24 22 HI SPD DATA - HI SPD DATA + 9 16 24 25 NETWORK BUS 2 NETWORK BUS 1 HI SPD DATA + HI SPD DATA - BLK WIRE BLU WIRE BLU/YEL WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRN WIRE DATA LINK CONNECTOR (LEFT SIDE OF DASH) DK BLU WIRE DLC FUSE BCM 3 FUSE GRN WIRE GRN/BLU WIRE GRN/BRN WIRE GRN/GRY WIRE GRN/VIO WIRE GRN/WHT WIRE GRN/YEL WIRE GROUND DISTRIBUTION SYSTEM GRY/VIO WIRE HOT AT ALL TIMES HS SERIAL DATA - IMMOBILIZER CONTROL MODULE (CENTER CONSOLE) INSTRUMENT PANEL INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT SIDE OF DASH) LINEAR INTERCONNECT NETWORK BUS 4 LO SPD GMLAN SER DATA LOGIC LEFT REAR WINDOW SWITCH LOGIC RIGHT REAR WINDOW SWITCH LT GRN/GRY WIRE NETWORK BUS 11 NETWORK BUS 2 NETWORK BUS 3 NETWORK BUS 4 RED/GRN WIRE RED/WHT WIRE STEERING WHEEL ANGLE SENSOR TRANSMISSION SHIFT LEVER POSITION INDICATOR VIO/YEL WIRE W/ KEYLESS ENGINE START SWITCH WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/VIO WIRE

BATTERY BLK WIRE BRN WIRE BRN/VIO WIRE BRN/YEL WIRE DRIVER OUTSIDE REARVIEW MIRROR DRIVER OUTSIDE REARVIEW MIRROR GLASS HOT AT ALL TIMES FUSE FUSE BLOCK (TOP OF BATTERY) HTD MIR FUSE HVAC CONTROL MODULE LEFT REAR WINDOW DEFOGGER NOISE FILTER PASSENGER OUTSIDE REARVIEW MIRROR PASSENGER OUTSIDE REARVIEW MIRROR GLASS REAR DEFOGGER GRID REAR DEFOGGER IND REAR DEFOGGER RELAY REAR DEFOGGER RLY CTRL REAR DEFOGGER SWITCH LOGIC RED WIRE RIGHT REAR WINDOW DEFOGGER NOISE FILTER RR DEFOG FUSE UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY)

1 2 3 4 5 6 DATA (-) DATA (-) DATA (+) DATA (+) VOLT GND 1 2 BATTERY GND ANTI-LOCK BRAKES SYSTEM AUTOMATIC TRANSMISSION ASSEMBLY BATTERY FUSE BLOCK (TOP OF BATTERY) BLK WIRE BLU WIRE BLU/RED WIRE BLU/YEL WIRE BRN WIRE COMPUTER DATA LINES COMPUTER DATA LINES SYSTEM CONTROL SOLENOID VALVE ASSEMBLY DATA (+) DATA (-) SPLY VOLT DK BLU WIRE DK BLU/YEL WIRE DRIVER INFORMATION CENTER DISPLAY ELECTRONIC BRAKE CONTROL MODULE (LEFT SIDE OF ENGINE COMPT) FUSE GRN WIRE GRN/BRN WIRE HOT AT ALL TIMES INSTRUMENT CLUSTER LOGIC LT GRN WIRE POWER STEERING CONTROL MODULE (LOWER LEFT SIDE OF DASH) POWER STEERING MOTOR POWER STEERING SHAFT TORQUE SENSOR RED/YEL WIRE SENS SIG SENS RTN STEERING ANGLE SENSOR (BASE OF STEERING COLUMN) SYSTEM TRANSMISSION CONTROL MODULE (TCM) 2.4L 3.6L TRANSMISSION OUTPUT SHAFT SPEED SENSOR W/ ADAPTIVE CRUISE CONTROL WHT WIRE WHT/DK BLU WIRE WHT/YEL WIRE YEL WIRE YEL/BLK WIRE

1 2 3 4 5 6 DATA (-) DATA (-) DATA (+) DATA (+) VOLT GND 1 2 GND BATTERY 2.4L 3.6L 2500 2500 2501 2501 COMPUTER DATA LINES 9 8 17 DATA + DATA - SPLY VOLT ANTI-LOCK BRAKES SYSTEM AUTOMATIC TRANSMISSION ASSEMBLY BATTERY FUSE BLOCK (TOP OF BATTERY) BLK WIRE BLU WIRE BLU/YEL WIRE BRN WIRE COMPUTER DATA LINES COMPUTER DATA LINES SYSTEM CONTROL SOLENOID VALVE ASSEMBLY DK BLU WIRE DRIVER INFORMATION CENTER DISPLAY ELECTRONIC BRAKE CONTROL MODULE (LEFT SIDE OF ENGINE COMPT) FUSE GRN WIRE GRN/BRN WIRE HOT AT ALL TIMES INSTRUMENT CLUSTER LOGIC LT GRN WIRE POWER STEERING CONTROL MODULE (LOWER LEFT SIDE OF DASH) POWER STEERING MOTOR (ON STEERING GEAR) POWER STEERING SHAFT TORQUE SENSOR RED/YEL WIRE SENS SIG SENS RTN STEERING ANGLE SENSOR (BASE OF STEERING COLUMN) SYSTEM TRANSMISSION CONTROL MODULE (TCM) TRANSMISSION OUTPUT SHAFT SPEED SENSOR W/ ADAPTIVE CRUISE CONTROL WHT WIRE WHT/DK BLU WIRE YEL WIRE YEL/BLK WIRE

135 MM FROM BREAKOUT TO 6105 6105 6106 6106 COMPUTER DATA LINES SYSTEM AWD/SADS FUSE BLK WIRE BLK/BRN WIRE BLU WIRE BLU/BLK WIRE BLU/YEL WIRE BRN WIRE BRN/DK BLU WIRE BRN/LT GRN WIRE BRN/RED WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/GRY WIRE DK GRN/GRY WIRE DRIVER INFORMATION CENTER DISPLAY GMLAN SER DATA (+) GMLAN SER DATA (+) GMLAN SER DATA (-) GMLAN SER DATA (-) GRN WIRE GRN/RED WIRE GRY/BLU WIRE GRY/DK BLU WIRE GRY/RED WIRE GRY/WHT WIRE HOT AT ALL TIMES INSTRUMENT CLUSTER LEFT FRONT SHOCK ABSORBER ACTUATOR LEFT FRONT VERTICAL BODY ACCELERATION SENSOR (LEFT FRONT STRUT TOWER) LEFT REAR SHOCK ABSORBER ACTUATOR LF WHL ACC LOW REF LOGIC LT GRN WIRE LT GRN/GRY WIRE LT GRN/VIO WIRE NCA WIRE ORG/ WIRE PACK) PNK/BLK WIRE REAR VERTICAL BODY ACCELERATION SENSOR (FRONT OF REAR COMPT) RED/GRY WIRE RIGHT FRONT SHOCK ABSORBER ACTUATOR RIGHT FRONT VERTICAL BODY ACCELERATION SENSOR (RIGHT FRONT STRUT TOWER) RIGHT REAR SHOCK ABSORBER ACTUATOR SUSPENSION CONTROL MODULE (LEFT CORNER OF REAR COMPT) UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO WIRE WHT WIRE WHT/BRN WIRE WHT/DK BLU WIRE WHT/VIO WIRE WHT/YEL WIRE YEL WIRE YEL/RED BLK/BRN WIRE YEL/RED WIRE

1 2 3 4 B+ GND VOLT AJAR SW SIG APPROXIMATELY 150 MM FROM BREAKOUT TO WINDOW MOTOR) B+ GND BLK WIRE BLK/BRN WIRE BLK/DK BLU WIRE BLK/DK GRN WIRE BLK/GRY WIRE BLK/LT GRN WIRE BRN WIRE BRN/WHT WIRE BRN/YEL WIRE CHILD SECURITY LOCK DISABLE RELAY COMPUTER DATA LINES SYSTEM FROM BREAKOUT TO WINDOW MOTOR) FUSE 71 GRN WIRE GRN/GRY WIRE GRY WIRE GRY/BLK WIRE GRY/LT GRN WIRE HOT AT ALL TIMES IGNITION MODE SWITCH KEYLESS ENTRY CONTROL MODULE (RIGHT KICK PANEL) LEFT REAR DOOR LATCH ASSEMBLY LEFT REAR WINDOW SWITCH LOW REF (7) SIG (6) LOW REF (6) SIG (8) LOW REF (8 SIG (7) NETWORK BUS 4 PASSENGER DOOR LATCH ASSEMBLY RED/WHT WIRE RIGHT REAR DOOR LATCH ASSEMBLY SERIAL DATA SW MODE CTRL LOW REF UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO WIRE VIO/BLK WIRE VIO/YEL WIRE WHT/DK BLU WIRE WHT/LT GRN WIRE WHT/YEL WIRE