Buick LaCrosse II (2009-2013) lt blu Wiring diagrams

12 24 HAZ SW LEFT TURN SIG HAZ SW RIGHT TURN SIG PPL 22 17 4 19 HEADLAMP SW PARK LP SIG HAZ LED DIMMING SIG B+ BRK APPLY SENS LO REF BLK WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRN WIRE CENTER HIGH MOUNTED STOP LAMP COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/VIO WIRE DK BLU/WHT WIRE DK GRN WIRE FUSE GRN WIRE GRN/YEL WIRE GRY WIRE GRY/BRN WIRE GRY/YEL WIRE HAZARD SWITCH HEAD PARK AUTO HEADLAMP SWITCH HOT AT ALL TIMES INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT SIDE OF DASH) INSTRUMENT PANEL MULTI-FUNCTION SWITCH 1 LEFT FRONT SIDE MARKER LAMP LEFT LICENSE PLATE LAMP LEFT PARK/ TURN SIGNAL LAMP LEFT REAR TURN SIGNAL LAMP LEFT TAIL LAMP LEFT TAIL/ STOP LAMP LEFT REAR SIDE MARKER LAMP LT BLU WIRE LT GRN WIRE LT GRN/RED WIRE LT GRN/VIO WIRE LT GRN/WHT WIRE OFF PPL RED WIRE RED/ LT BLU WIRE RED/BRN WIRE RED/DK GRN WIRE RED/LT GRN WIRE RED/WHT WIRE RIGHT LICENSE PLATE LAMP VIO/GRY WIRE W/ HID W/O HID WHT WIRE WHT/ DK BLU WIRE WHT/YEL WIRE

BLK WIRE BRAKE PEDAL POSITION SENSOR (NEAR TOP OF ACCELERATOR PEDAL ASSEMBLY) BRN WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/ WHT WIRE DK BLU/VIO WIRE DK BLU/WHT WIRE DRIVER OUTSIDE REARVIEW MIRROR LEFT TURN SIGNAL REPEATER LAMP FUSE GMLAN LO SPD GRN WIRE GRY/BRN WIRE HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED INSTRUMENT CLUSTER LEFT TURN IND LOGIC LT BLU WIRE LT GRN WIRE LT GRN/ VIO WIRE LT GRN/VIO WIRE PASSENGER OUTSIDE REARVIEW MIRROR PPL RED/ LT BLU WIRE RED/WHT WIRE RIGHT FRONT SIDE MARKER LAMP RIGHT PARK/ TURN SIGNAL LAMP RIGHT REAR TURN SIGNAL LAMP RIGHT TAIL LAMP RIGHT TAIL/ STOP LAMP RIGHT REAR SIDE MARKER LAMP RIGHT TURN IND RIGHT TURN SIGNAL REPEATER LAMP RUN/CRANK IGNITION 1 VOLT SER DATA TURN SIGNAL/ MULTI-FUNCTION SWITCH UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO WIRE VIO/GRY WIRE W/ HID W/ HID RIGHT HEADLAMP W/ POWER FOLDING OUTSIDE MIRROR W/O HID W/O POWER FOLDING OUTSIDE MIRROR WHT WIRE WHT/YEL WIRE

AUTO BLK WIRE BRN WIRE BRN/VIO WIRE COMPUTER DATA LINES SYSTEM DIMMER SWITCH DK BLU WIRE DK BLU/BLK WIRE DK BLU/VIO WIRE FOG LAMP SWITCH FRONT FOG LAMP IND GRN WIRE GRY WIRE GRY/RED WIRE HEAD PARK HEADLAMP SWITCH HIGH BEAM LAMP IND INSTRUMENT PANEL CLUSTER LEFT FRONT FOG LAMP LOGIC LOW SPD GMLAN SER DATA LT BLU WIRE LT GRN WIRE OFF PARK BRAKE CONTROL SWITCH PARK BRK RELEASE SW SIG PARK BRK SW SIG PARKING BRAKE CONTROL MODULE (BEHIND LEFT REAR WHEEL LINER) RIGHT FRONT FOG LAMP VOL REF PARK BRK SPLY VOLT WHT WIRE YEL WIRE YEL/RED WIRE

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

BLK WIRE BRN WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/BLK WIRE DK BLU/VIO WIRE FUSE GRY WIRE GRY/RED WIRE HOT AT ALL TIMES LT BLU WIRE PARK BRAKE CONTROL SWITCH PARKING BRAKE CONTROL MODULE (BEHIND LEFT REAR WHEEL LINER) RED/VIO WIRE UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) WHT WIRE WHT/DK BLU WIRE YEL WIRE YEL/RED WIRE

1 2 3 4 5 6 7 8 9 10 11 12 B+ GND SW LOW REF BLK WIRE BRN WIRE CLOSE COMPUTER DATA LINES SYSTEM DK BLU WIRE EXPRESS CLOSE EXPRESS OPEN FUSE GRN WIRE GRY WIRE HOT AT ALL TIMES INTERCONNECT BUS 1 SW DAT 1 LOGIC LT BLU WIRE RED/GRY WIRE RED/WHT WIRE SUNROOF CONTROL MODULE (BEHIND ROOF CONSOLE) SUNROOF SUNSHADE MOTOR MODULE (REAR OF SUNROOF) SUNROOF SUNSHADE SWITCH SUNROOF SWITCH UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) YEL WIRE

1 25 26 12 DRAIN WIRE AUDIO SIG AUDIO SIG COMM SIG 34 37 35 36 PPL 5 4 VIDEO MODULE SIG VIDEO BRIGHT SIG 7 6 5 4 3 2 1 DRAIN WIRE AUX AUDIO LT SIG AUX AUDIO LT SIG AUDIO/VIDEO INPUT ADAPTER AUX VIDEO HI SIG BAT POS VOLT BATT POS VOLT BLK WIRE BLUNT CUT) BRIGHT SIG BRN WIRE BRN/WHT WIRE DK BLU WIRE DK BLU/GRY WIRE DK BLU/YEL WIRE DK GRN/WHT WIRE DRIVER SEATBACK VIDEO DISPLAY DVD VIDEO SIG (+) FUSE GRN/WHT WIRE GROUND GROUND PROVISION GRY/BRN WIRE GRY/YEL WIRE HOT AT ALL TIMES INFRARED RED AUDIO SIG WIRE LH DVD AUDIO SIG (+) LT BLU WIRE LT GRN WIRE LT GRN/DK BLU WIRE MODE 2 SIG NCA WIRE ORG/BLK WIRE ORG/BLU WIRE PASSENGER SEATBACK VIDEO DISPLAY PNK/BLK WIRE PPL DVD AUDIO COMMON PPL/RED WIRE RADIO RADIO CIRCUIT REAR BODY FUSE BLOCK (ON LEFT REAR RED/BRN WIRE RED/WHT WIRE REMOTE ENABLE REMOTE INFRARED SIG (-) REMOTE SIG RH AUDIO SIG RH DVD AUDIO SIG(+) RH INFRARED AUDIO SIG RT INFRARED AUDIO SIG VIDEO BRIGHT SIG VIDEO DRAIN WIRE VIDEO MODE 2 SIG VIDEO MODULE SIG VIDEO SIG 2 - VIO WIRE VIO/BLK WIRE VIO/DK BLU WIRE WHEELHOUSE) WHT WIRE WHT/BLK WIRE WHT/DK BLU WIRE WHT/GRY WIRE WHT/LT GRN WIRE WHT/VIO WIRE WHT/YEL WIRE YEL WIRE

AJAR AJAR SW SIG BLK WIRE BLK/ORG WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRAKE IND BRN WIRE BRN/GRN WIRE BUS 4 COMPUTER DATA LINES SYSTEM DK BLU RED/ WIRE DK BLU WIRE DK BLU/ WHT WIRE DK BLU/BLK WIRE DK BLU/VIO WIRE DK GRN/GRY WIRE DRIVER DOOR LATCH ASSEMBLY DRIVER INFORMATION CENTER DISPLAY DRIVER SEAT BELT BUCKLE DRIVER SEAT BELT SWITCH DRIVER WINDOW MOTOR DRIVER WINDOW SWITCH DRIVER'S DOOR FUSE FUSE (LOWER LEFT SIDE OF DASH) GMLAN SERIAL DATA GRN WIRE GRN/GRY WIRE GRN/YEL WIRE GROUND GRY DK GRN WIRE GRY WIRE GRY/RED WIRE HEAD PARK AUTO OFF HEADLAMP SW PRK LAMP SIG HEADLAMP SWITCH HOT AT ALL TIMES INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (SDM) (BELOW CENTER CONSOLE) INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK LEFT REAR DOOR LATCH ASSEMBLY LEFT REAR WINDOW SWITCH LO SPD GMLAN SER DATA LOGIC LOW ENGINE OIL PRESSURE IND LOW SPD GMLAN SER DATA SER DATA COMMUNICATION ENABLE LOW TIRE PRESSURE IND LT BLU WIRE LT GRN WIRE NCA WIRE NETWORK NETWORK BUS 3 NETWORK BUS 4 OFF KEY IGNITION SWITCH IGNITION SWITCH (RIGHT SIDE OF STEERING COLUMN) OFF/RUN/ CRANK VOLT ORG/BRN WIRE PARK BRAKE CONTROL SWITCH (ON PARK BRAKE ASSEMBLY) PARKING BRAKE CONTROL MODULE (BEHIND LEFT REAR WHEEL LINER) PASSENGER DOOR LATCH ASSEMBLY PASSENGER WINDOW MOTOR (FRONT PASSENGER'S DOOR) PRK BRK APPLY SW VOLT REF PRK BRK SW SUP VOLT PRK BRK SW SUPP VOLT PRK BRK SW RELEASE SIG PRK BRK SW APPLY SIG RED/DK BLU WIRE RED/DK GRN WIRE RED/LT GRN WIRE RIGHT REAR DOOR LATCH ASSEMBLY RIGHT REAR WINDOW SWITCH RUN WIRE SEAT BELT IND SEAT BELT SW LOW REF SEAT BELT SW SIG SER DATA COMMUNI- LVL CATION SENS ENABLE SIG SERIAL DATA COMMUNIC- ATION ENABLE PRK BRK SW SIG SPLICE PACK) (BOTTOM OF "A" PILLAR) SW SIG VIO/ DK BLU WIRE WHT WIRE WHT/DK BLU WIRE WHT/YEL WIRE YEL WIRE YEL/RED WIRE

5-VOLT REF 1 BLK/BRN WIRE BLK/GRY WIRE BLK/LT GRN WIRE BLK/VIO WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE DK BLU WIRE DK BLU/GRY WIRE DK BLU/WHT WIRE DK GRN WIRE ENGINE CONTROL MODULE (LEFT FRONT ENGINE CONTROL MODULE RELAY EXHAUST CAMSHAFT POSITION ACTUATOR SOLENOID VALVE EXHAUST SOLENOID (1) FUEL INJECTOR 1 FUEL INJECTOR 1 CTRL FUEL INJECTOR 1 CYND FUEL INJECTOR 2 FUEL INJECTOR 2 CTRL FUEL INJECTOR 2 CYND FUEL INJECTOR 3 FUEL INJECTOR 3 CTRL FUEL INJECTOR 3 CYND FUEL INJECTOR 4 FUEL INJECTOR 4 CTRL FUEL INJECTOR 4 CYND FUSE FUSE FUSE GRY/DK BLU WIRE GRY/YEL WIRE HOT AT ALL TIMES BATTERY FUSE BLOCK (TOP OF BATTERY) INTAKE SOLENOID (1) LOW REF LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/GRY WIRE LT GRN/WHT WIRE OF ENGINE COMPT) RED WIRE RED/WHT WIRE SIG GROUND TOP OF ENGINE) UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO/BRN WIRE VIO/DK BLU WIRE YEL WIRE

BLK WIRE BLK/DK BLU WIRE BLK/GRY WIRE BLK/LT GRN WIRE BLK/VIO WIRE BRN WIRE BRN/RED WIRE BRN/WHT WIRE CAMSHAFT POS EXHAUST SENS 2 CHARGE IND CTRL DK BLU WIRE DK BLU/GRY WIRE DK BLU/WHT WIRE ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT) ENGINE COOLANT TEMPERATURE SENSOR FUEL RAIL PRESSURE SENSOR (TOP OF ENGINE ON FUEL RAIL) GRY WIRE GRY/DK BLU WIRE GRY/RED WIRE IGN CTRL LO REF BANK 2 INSTRUMENT CLUSTER SYSTEM LT BLU WIRE LT GRN WIRE LT GRN/BRN WIRE LT GRN/DK BLU WIRE LT GRN/GRY WIRE LT GRN/WHT WIRE OIL PRESSURE SW SIG SENS LOW REF SENS LOW REF SENS LOW REF OIL PRESSURE SENS LOW REF SENS LOW REF STARTING/CHARGING SYSTEM TAN WIRE VIO/BLK WIRE VIO/BRN WIRE VIO/DK BLU WIRE VIO/GRY WIRE VIO/LT GRN WIRE WHT/LT GRN WIRE YEL WIRE YEL/DK BLU WIRE YEL/VIO WIRE