Buick LaCrosse II (2009-2013) brn/wht Wiring diagrams

1 2 33 32 RF DRL SPLY VOLT LF DRL SPLY VOLT 2 3 2540 2140 B+ B+ 22 10 5060 278 LOW SPD GMLAN SER DATA AMBIENT LIGHT SENS SIG 22 11 16 13 306 103 HDLP SW PARK LP SIG ADAPTIVE FRONT LIGHTING CIRCUIT AMBIENT LIGHT/ SUNLOAD SENSOR (CENTER OF DASH) BLK WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRN WIRE BRN/VIO WIRE BRN/WHT WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM CRUISE CONTROL, SOUND SYSTEMS DK BLU WIRE DK BLU/BRN WIRE FRONT FOG LAMP FUSE FUSE FUSE GRN WIRE GRY WIRE GRY/DK BLU WIRE HDLP DIMMER SW HI BEAM SIG HDLP OFF SIG CTRL HDLP SW ON SIG HDLP SW FLASH TO PASS SIG HEADLAMP HIGH BEAM RELAY HEADLAMP LOW BEAM RELAY HIGH LOW FTP HOT AT ALL TIMES HOT AT ALL TIMES BATTERY FUSE BLOCK FUSE (TOP OF BATTERY) HVAC CONTROL MODULE INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT SIDE OF DASH) LEFT DAYTIME RUNNING LAMP (BOTTOM OF "A" PILLAR) LEFT HEADLAMP LEFT HIGH BEAM SOLENOID ACTUATOR LEFT LOW BEAM HEADLAMP LIGHTING CTRL SW REF LIGHTING CTRL SW SIG LOW REF LT GRN WIRE NCA WIRE RED WIRE RED/BLK WIRE RELAY RIGHT DAYTIME RUNNING LAMP RIGHT HEADLAMP RIGHT HEADLAMP BALLAST RIGHT HIGH BEAM SOLENOID ACTUATOR RIGHT LOW BEAM HEADLAMP TURN SIGNAL/ MULTI-FUNCTION SWITCH UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO WIRE WHT WIRE YEL WIRE

1 2 RT HDLP LW BEAM SPLY VOLT LT HDLP LW BEAM SPLY VOLT 17 11 HDLP SW FLASH TO PASS SIG HDLP DIMMER SW HI BEAM SIG 18 10 HDLP HI BEAM RLY CTRL 2 3 B+ B+ 22 11 16 HDLP SW PARK LP SIG AMBIENT LIGHT SENS SIG AMBIENT LIGHT/ SUNLOAD SENSOR (CENTER OF DASH) AUTO OFF BLK WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRN/VIO WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM (FRONT OF AIR FILTER) CRUISE CONTROL, SOUND SYSTEMS DIMMER SWITCH FOG LAMP RLY CTRL FOG LAMP SWITCH FRONT FOG LAMP IND FRONT FOG LAMP RELAY FUSE GRN WIRE HDLP OFF SIG CTRL HDLP SW ON SIG HEAD HEADLAMP HIGH BEAM RELAY HEADLAMP SWITCH HIGH BEAM LAMP IND HIGH LOW FTP HOT AT ALL TIMES HOT AT ALL TIMES BATTERY FUSE BLOCK FUSE (TOP OF BATTERY) HVAC CONTROL MODULE INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT SIDE OF DASH) LEFT FRONT FOG LAMP LEFT HEADLAMP LEFT HIGH BEAM HEADLAMP LEFT LOW BEAM HEADLAMP LIGHTING CTRL SW REF LIGHTING CTRL SW SIG LOGIC INSTRUMENT PANEL CLUSTER LOW REF LOW SPD GMLAN SER DATA LT GRN WIRE PARK AUTO OFF HEAD PARK RED WIRE RED/BLK WIRE RIGHT FRONT FOG LAMP RIGHT HEADLAMP RIGHT HIGH BEAM HEADLAMP RIGHT LOW BEAM HEADLAMP TURN SIGNAL/ MULTI-FUNCTION SWITCH UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) WHT WIRE 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)

2.4L 25 26 25 26 27 70 36 9 26 41 FUEL LVL LOW REF FUEL LVL SERIAL DATA 3.0L, 3.6L 419 893 185 ENGINE CONTROLS SYSTEM 6 12 DN ABS IND. AIR BAG IND AMBIENT AIR TEMPERATURE SENSOR (LEFT FRONT OF VEHICLE ON BUMPER FASCIA) AWD DK BATT POS VOLT IGNITION 1 VOLTAGE BLK WIRE BLK/DK BLU WIRE BLK/LT GRN WIRE BLK/YEL WIRE BLU WIRE BRAKE IND BRAKE WEAR IND BRN/WHT WIRE CHARGING IND CHECK ENGINE INDI CTRL DIC SELECT MENU SW SIG LOW WASHER FLUID IND CTRL COMPUTER DATA LINES SYSTEM CRUISE IND DK BLU WIRE DK BLU/GRY WIRE DK BLU/LT GRN WIRE DK BLU/WHT WIRE DRIVER INFORMATION CENTER (DIC) DISPLAY ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT) 3.0L 3.6L 2.4L ENGINE CONTROLS SYSTEM ENGINE COOLANT TEMPERATURE GAUGE ENGINE COOLANT TEMPERATURE IND ENGINE OIL PRESSURE SWITCH (FRONT OF ENGINE) ENGINE OIL PRESSURE SWITCH (LOWER FRONT ESC OFF IND FOG LAMPS IND FUEL GAUGE FUEL PUMP, LEVEL SENDER ASSEMBLY (IN FUEL TANK) FUSE FUSE FUSE GRN WIRE GROUND GRY WIRE HIGH BEAM IND HOT AT ALL TIMES INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT SIDE OF DASH) HOT W/ IGNITION MAIN RELAY ENERGIZED ILLUMINATION INSTRUMENT CLUSTER LEFT TURN IND LOGIC LOW FUEL WARNING LAMP IND LOW REF (OR 2755) LOW SPD GMLAN SER DATA LOW TIRE PRESSURE IND LOW WASHER FLUID IND LT GRN WIRE MALFUNCTION IND MENU OF ENGINE) OIL LEVEL IND OIL PRESS SW OUTSIDE AMBIENT AIR TEMP SENS SIG LOW REF DIC SWITCH LOW REF DIC SWITCH SIGNAL PARK IND PARK LAMPS IND RED WIRE RED/BLK WIRE RED/WHT WIRE RIGHT TURN IND SEAT BELT IND SECONDARY FUEL LEVEL SENSOR (TOP OF FUEL TANK) SECURITY IND SET/CLR SPEEDOMETER TACHOMETER TCS OFF IND TCS/ECS IND TURN SIGNAL/ MULTI-FUNCTION SWITCH UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO WIRE VIO/GRY WIRE VIO/YEL WIRE WHT WIRE WIPER/WASHER SYSTEM YEL/DK BLU 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

1 2 3 4 5 6 POS VOLT GND VOLT AJAR SW SIG BATT FUSE BLK WIRE BLK/BRN WIRE BLK/DK BLU WIRE BLK/GRY WIRE BLK/LT GRN WIRE BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DK BLU/BLK WIRE DK BLU/WHT WIRE GRN WIRE GRN/GRY WIRE GRY WIRE GRY/BLK 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) LT GRN WIRE LT GRN/BLK WIRE MTR FUSE WHEELHOUSE) NETWORK BUS 4 PASSENGER DOOR LATCH ASSEMBLY POS VOLT GND PPL PPL REAR BODY FUSE BLOCK (ON LEFT REAR RED/DK BLU WIRE RED/WHT WIRE RIGHT REAR DOOR LATCH ASSEMBLY RR LATCH CTRL LR LATCH CTRL PASS DR LATCH CTRL DRV DR LATCH CTRL RR UNLATCH CTRL LR UNLATCH CTRL PASS DR UNLATCH CTRL DRV DR UNLATCH CTRL SERIAL DATA SW MODE CTRL LOW REF VIO/BLK WIRE VIO/DK BLU WIRE VIO/YEL WIRE WHT/LT GRN WIRE WHT/YEL WIRE YEL/BLK WIRE

BLK WIRE BLK/BLU WIRE BLK/BRN WIRE BLK/GRY WIRE BLK/LT GRN WIRE BLK/VIO WIRE BLK/WHT WIRE BLU/GRY WIRE BLU/WHT WIRE BRN WIRE BRN/DK BLU WIRE BRN/LT GRN WIRE BRN/RED WIRE BRN/WHT WIRE DK BLU WIRE DK BLU/GRY WIRE DK BLU/WHT WIRE FUEL TANK PRESSURE SENSOR GRY WIRE GRY/DK BLU WIRE GRY/RED WIRE IGNITION COIL 2 (RIGHT FRONT OF ENGINE ABOVE CYLINDER 2) IGNITION COIL 4 (CENTER FRONT OF ENGINE ABOVE CYLINDER 4) IGNITION COIL 6 (LEFT FRONT OF ENGINE ABOVE CYLINDER 6) LT GRN WIRE LT GRN/BRN WIRE LT GRN/DK BLU WIRE NCA WIRE PLUG SPARK SPARK PLUG VIO/BLK WIRE VIO/BRN WIRE VIO/DK BLU WIRE WHT WIRE YEL WIRE YEL/DK BLU WIRE YEL/RED WIRE YEL/VIO WIRE

BLK WIRE BLK/BRN WIRE BLK/DK BLU WIRE BLK/GRN WIRE BLK/LT GRN WIRE BLK/VIO WIRE BLU/VIO WIRE BRN WIRE BRN/DK BLU WIRE BRN/LT GRN WIRE BRN/RED WIRE BRN/WHT WIRE DK BLU WIRE DK BLU/GRY WIRE DK BLU/VIO WIRE DK BLU/WHT WIRE GRY WIRE GRY/RED WIRE IGNITION COIL 1 (RIGHT REAR OF ENGINE ABOVE CYLINDER 1) IGNITION COIL 3 (CENTER REAR OF ENGINE ABOVE CYLINDER 3) IGNITION COIL 5 (LEFT REAR OF ENGINE ABOVE CYLINDER 5) INSTRUMENT CLUSTER SYSTEM LT GRN WIRE LT GRN/DK BLU WIRE NCA WIRE PLUG SPARK SPARK PLUG VIO/BLK WIRE VIO/DK BLU WIRE YEL WIRE YEL/DK BLU WIRE YEL/RED WIRE YEL/VIO WIRE

"CHECK ENGINE" IND CTRL BATT POS VOLT BLK WIRE BLK/BRN WIRE BLK/DK BLU WIRE BLK/GRN WIRE BLK/GRY WIRE BLK/LT GRN WIRE BLK/YEL WIRE BLU/BRN WIRE BRN WIRE BRN/DK BLU WIRE BRN/LT GRN WIRE BRN/RED WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DATA BUS - DK BLU WIRE DK BLU/GRY WIRE DK BLU/VIO WIRE DK BLU/WHT WIRE ECM (LEFT FRONT OF ENGINE COMPT) ECT SENS SIG ENGINE CONTROL MODULE FLP SENS SIG FUEL CTRL SHIELD FUEL PMP SPLY VOLT FUEL PUMP LO CTRL GRY WIRE GRY/WHT WIRE HI SIG BANK 1 SENS (1) HI SIG BANK 2 SENS 1 HI VOLT CTRL CYL 1 HI VOLT CTRL CYL 2 HI VOLT SPLY 1 HI VOLT SPLY 4 IGN 1 VOLT IGN CTRL (1) IGN CTRL (2) IGN CTRL (3) IGN CTRL (4) IGN CTRL (5) IGN CTRL (6) IGN CTRL REF BANK 1 KNOCK SENS 1 SIG KNOCK SENS 2 SIG KNOCK SENS REF (1) LO CTRL BANK 1 SENS (1) LO CTRL BANK 2 SENS 1 LO SIG BANK 2 SENS 1 LOW REF LOW REF 2 LOW SIG BANK 1 SENS (1) LT GRN/DK BLU WIRE LT GRN/GRY WIRE LT GRN/YEL WIRE MAIN RELAY SPLY (2) NCA WIRE PRIMARY RLY CTRL RED/VIO WIRE RELAY FUSED SPLY (3) SER DATA COMMU- NICATION ENABLE THROTTLE SENS REF THROTTLE SENS SIG (1) THROTTLE SENS SIG (2) VIO/BLK WIRE VIO/DK BLU WIRE VIO/GRY WIRE VIO/WHT WIRE WHT WIRE WHT/BLK WIRE WHT/DK BLU WIRE WHT/GRY WIRE YEL WIRE YEL/DK BLU WIRE YEL/RED WIRE YEL/WHT WIRE

BATTERY FUSE BLOCK (TOP OF BATTERY) BLK/GRY WIRE BLK/LT GRN WIRE BLK/YEL WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DK BLU/WHT WIRE ENGINE CONTROLS IGNITION RELAY FUSE FUSE FUSE GRN WIRE GRY/WHT WIRE HEATED OXYGEN SENSOR BANK 1 SENSOR 1 (REAR OF ENGINE IN BANK 1 EXHAUST MANIFOLD) HEATED OXYGEN SENSOR BANK 2 SENSOR 1 (REAR OF ENGINE IN BANK 2 EXHAUST MANIFOLD) HIGH PRESSURE FUEL PUMP (LEFT REAR OF ENGINE) HOT AT ALL TIMES IGN INSTRUMENT CLUSTER KNOCK SENSOR 1 (LEFT OF EXHAUST MANIFOLD) KNOCK SENSOR 2 (RIGHT OF STARTER) LOGIC LO SPD GMLAN SERIAL DATA LT GRN/GRY WIRE LT GRN/YEL WIRE MALFUNCTION IND RED WIRE RED/BLU WIRE RED/BRN WIRE RED/LT GRN WIRE RED/VIO WIRE UNDERHOOD FUSE BLOCK VIO/BLK WIRE VIO/DK BLU WIRE VIO/GRY WIRE VIO/WHT WIRE WHT WIRE WHT/BLK WIRE WHT/GRY WIRE YEL WIRE YEL/RED WIRE YEL/WHT WIRE