Buick LaCrosse II (2009-2013) batt pos volt Wiring diagrams

BATT POS VOLT BLK WIRE BLK/BRN WIRE BLK/GRY WIRE BLOWER MTR SPD CTRL BLOWER MTR SPLY VOLT BLU WIRE BRN/YEL WIRE DK BLU WIRE DUCT LEFT LOWER AIR TEMPERATURE SENSOR (LEFT SIDE OF HVAC CONTROL MODULE) DUCT LEFT UPPER AIR TEMPERATURE SENSOR (LEFT SIDE OF HVAC MODULE) DUCT RIGHT LOWER AIR TEMPERATURE SENSOR (BEHIND HVAC CONTROL MODULE) DUCT RIGHT UPPER AIR TEMPERATURE SENSOR (RIGHT SIDE OF HVAC MODULE) FT BLOWER MTR LOW REF FUSE GRY/DK GRN WIRE HOT AT ALL TIMES INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT LT GRN/VIO WIRE PPL/GRY WIRE RED WIRE RED/BRN WIRE RED/VIO WIRE SIDE OF DASH) UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) WHT/PPL WIRE

BATT POS VOLT BATT POS VOLT SERIAL DATA SERIAL DATA GROUND BLK WIRE COMPUTER DATA LINES SYSTEM DRIVER OUTSIDE REARVIEW MIRROR FUSE GRN WIRE GRY WIRE GRY/YEL WIRE HOT AT ALL TIMES LED SIGNAL LEFT SIDE OBJECT SENSOR (BEHIND LEFT REAR WHEEL) PASSENGER OUTSIDE REARVIEW MIRROR RED/LT GRN WIRE RIGHT SIDE OBJECT SENSOR (BEHIND RIGHT REAR WHEEL) SERIAL DATA GROUND GROUND LED SIGNAL UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY)

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

ACCESSORY VOLTAGE AJAR SW SIG AMBIENT LIGHT/ SUNLOAD SENSOR (CENTER OF DASH) BATT POS VOLT BLK WIRE BODY CONTROL MODULE (BCM) (LEFT SIDE OF DASH) BRN WIRE BRN/LT GRN WIRE BRN/VIO WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE DR LK CTRL DRV DR LK SW LK SIG DRV DR LK SW UNLK SIG DRV DR LK UNLK CTRL FUSE GRN/GRY WIRE GRN/YEL WIRE GRY WIRE HDLP HI BEAM RLY CTRL HEADLIGHTS SYSTEM HOOD AJAR SW SIG HOOD AJAR SWITCH (FRONT OF ENGINE COMPT) HORN RLY CTRL HORNS SYSTEM HOT AT ALL TIMES HVAC CONTROL MODULE INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT SIDE OF DASH) INSTRUMENT PANEL MULTI-FUNCTION SWITCH 1 LK MTR STATUS SIG LR LK MTR STATUS SIG RR NETWORK BUS 4 POS VOLT PPL RED/WHT WIRE RIGHT REAR WINDOW SWITCH RUN/CRANK IGN 1 VOLT SECURITY IND CTRL UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO/BLK WIRE VIO/DK BLU WIRE VIO/GRY WIRE VIO/YEL WIRE WHT WIRE YEL WIRE YEL/BLK WIRE

BATT POS VOLT BLK WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRN/LT GRN WIRE COMPUTER DATA LINES SYSTEM DK GRN (OR LT GRN) WIRE FUSE OF BATTERY) GRN/PPL WIRE GRY WIRE HOOD AJAR SW SIG HOOD AJAR SWITCH (FRONT OF ENGINE COMPT) HOT AT ALL TIMES IMMOBILIZER CONTROL MODULE (CENTER CONSOLE) LT GRN WIRE LT GRN/VIO WIRE NETWORK BUS 11 PPL RED/WHT WIRE UNDERHOOD FUSE BLOCK (LEFT SIDE VEH IMMOBILIZER RTN VEH SPLY VOLT YEL WIRE

ACCESSORY VOLTAGE AJAR SW SIG AMBIENT LIGHT/ SUNLOAD SENSOR (CENTER OF DASH) BATT POS VOLT BLK WIRE BODY CONTROL MODULE (BCM) (LEFT SIDE OF DASH) BRN WIRE BRN/LT GRN WIRE BRN/VIO WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE DR LK CTRL DRV DR LK SW LK SIG DRV DR LK SW UNLK SIG DRV DR LK UNLK CTRL FUSE GRN/GRY WIRE GRN/YEL WIRE GRY WIRE HDLP HI BEAM RLY CTRL HEADLIGHTS SYSTEM HOOD AJAR SW SIG HOOD AJAR SWITCH (FRONT OF ENGINE COMPT) HORN RLY CTRL HORNS SYSTEM HOT AT ALL TIMES HVAC CONTROL MODULE INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT SIDE OF DASH) INSTRUMENT PANEL MULTI-FUNCTION SWITCH 1 LK MTR STATUS SIG LR LK MTR STATUS SIG RR NETWORK BUS 4 POS VOLT PPL RED/WHT WIRE RIGHT REAR WINDOW SWITCH RUN/CRANK IGN 1 VOLT SECURITY IND CTRL UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO/BLK WIRE VIO/DK BLU WIRE VIO/GRY WIRE VIO/YEL WIRE WHT WIRE YEL WIRE YEL/BLK WIRE

AUDIO JACK AUDIO SIG + AUX AUDIO JACK AUX AUDIO SIG AUX DETECTION SIG AUXILIARY AUDIO INPUT (W/ AUDIO INTERFACE) BATT POS VOLT BLK WIRE BLK/YEL WIRE BRN WIRE CENTER RESET SIG CENTER STACK SIG CGI - COMMON SIG COMPUTER DATA LINES SYSTEM DETECTION SIG DK BLU WIRE DRAIN WIRE GMLAN SERIAL DATA GRN WIRE GRN/BLU WIRE GROUND GRY WIRE GRY/DK GRN WIRE JACK LEFT (+) JACK RIGHT (+) LEFT AUX SIG (2) LEFT SIG (2) LOCAL NETWORK 10 LT GRN WIRE LT GRN/YEL WIRE MULTIMEDIA PLAYER INTERFACE MODULE (W/ EQUIPPED) NCA WIRE PPL PPL W/ NAVIGATION RED/DK BLU WIRE RIGHT AUX SIG (2) RIGHT SIG 2 VIO WIRE W/ AUDIO INTERFACE W/O AUDIO INTERFACE W/O NAVIGATION PPL YEL WIRE

AMPLIFIER CTRL AUDIO SIG (3) AUX DET SIG BATT POS VOLT BLK WIRE BLK/YEL WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRN/DK BLU WIRE BRN/VIO WIRE BRN/WHT WIRE CENTER AUDIO SIG CENTER SIG CGI - COMMON SIG COMPUTER DATA LINES SYSTEM CRUISE CONTROL SYSTEM CTRL SW SIG DK BLU WIRE DK BLU/BLK WIRE DK BLU/BRN WIRE DK BLU/GRY WIRE DK BLU/VIO WIRE DRAIN WIRE DRIVER SEATBACK VIDEO DISPLAY (W/ REAR SEAT ENTERTAINMENT) FRT LO LVL SIG (-) GM LAN SER DATA GMLAN SERIAL DATA GRN WIRE GRY WIRE GRY/DK GRN WIRE HEADLIGHTS SYSTEM LEFT AUDIO SIG LEFT AUX SIG (2) LF LO LVL SIG LOW LVL (-) LOW LVL SIG (-) LR LO LVL SIG LT GRN WIRE LT GRN/BLK WIRE LT GRN/DK BLU WIRE LT GRN/YEL WIRE NCA WIRE ORG/ WIRE PASSENGER SEATBACK VIDEO DISPLAY (W/ REAR SEAT ENTERTAINMENT) PPL RADIO RED WIRE REMOTE ENABLE RF LO LVL SIG RIGHT AUDIO SIG RIGHT SIG 2 RIGHT STEERING WHEEL CONTROLS SWITCH RR LO LVL SIG SEEK DOWN SEEK UP SOURCE STACK RESET SIG STEERING WHEEL AIR BAG COIL SW REF VOLT VIDEO SYSTEM CIRCUIT VIO WIRE VIO/DK BLU WIRE VOICE LOW REF VOICE MUTE VOICE SIG VOL (-) W/ REAR SEAT ENTERTAINMENT WHT WIRE WHT/BLK WIRE WHT/VIO WIRE YEL WIRE

AUDIO JACK AUDIO SIG + AUX AUDIO JACK AUX AUDIO SIG AUX DETECTION SIG AUXILIARY AUDIO INPUT (W/ AUDIO INTERFACE) BATT POS VOLT BLK WIRE BLK/YEL WIRE BRN WIRE CENTER RESET SIG CENTER STACK SIG CGI - COMMON SIG COMPUTER DATA LINES SYSTEM DETECTION SIG DK BLU WIRE DRAIN WIRE GMLAN SERIAL DATA GRN WIRE GRN/BLU WIRE GROUND GRY WIRE GRY/DK GRN WIRE JACK LEFT (+) JACK RIGHT (+) LEFT AUX SIG (2) LEFT SIG (2) LOCAL NETWORK 10 LT GRN WIRE LT GRN/YEL WIRE MULTIMEDIA PLAYER INTERFACE MODULE (W/ EQUIPPED) NCA WIRE PPL PPL W/ NAVIGATION RED WIRE RED/DK BLU WIRE RIGHT AUX SIG (2) RIGHT SIG 2 VIO WIRE W/ AUDIO INTERFACE W/O AUDIO INTERFACE W/O NAVIGATION PPL YEL 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