Buick LaCrosse III (2016-2019) instrument panel fuse block Wiring diagrams

AIR QUALITY SENS SIG AMBIENT LIGHT/SUNLOAD SENSOR (TOP CENTER OF DASH) BATT POS VOLT BLK WIRE BLK/BLU WIRE BLOWER MOTOR (BOTTOM OF HVAC BLOWER HOUSING) BLWR MTR SPD CTRL BRN WIRE BUS 15 COMPUTER DATA LINES SYSTEM DEFOGGER SYSTEM DK BLU WIRE DK BLU/BRN WIRE DK BLU/GRY WIRE DK BLU/YEL WIRE DK GRN/WHT WIRE DK GRN/YEL WIRE DOOR LOCKS, ANTI-THEFT SYSTEMS ELECTRIC VARIABLE DISPLACEMENT CTRL ELECTRIC VARIABLE DISPLACEMENT SUPPLY FUSE 33 FUSE 39 FUSE 4 GROUND GRY WIRE GRY/BLU WIRE GRY/GRN WIRE HEADLIGHTS SYSTEM HOT AT ALL TIMES HUMIDITY SENSOR SIGNAL HUMIDITY TEMPERATURE SENSOR SIGNAL HUMIDITY/WINDSCREEN TEMPERATURE SENSOR LOW REFERENCE HVAC CONTROL MODULE (BEHIND HVAC CONTROLS) INSIDE AIR TEMPERATURE SENSOR SIGNAL INSTRUMENT PANEL FUSE BLOCK LINEAR INTERCONNECT NETWORK SERIAL DATA BUS 9 LOGIC LOGIC WINDSHIELD TEMPERATURE, INSIDE MOISTURE SENSOR LOW SPEED GMLAN SERIAL DATA LT GRN WIRE REAR DEFOG RELAY CTRL RED/DK BLU WIRE RED/LT BLU WIRE RED/VIO WIRE RED/WHT WIRE RUN/CRANK IGNITION 1 VOLTAGE SERIAL DATA SOLAR SENSOR DRIVER SIGNAL SOLAR SENSOR LOW REFERENCE VIO/GRY WIRE VIO/WHT WIRE W/ ONSTAR W/O ONSTAR WHT WIRE WINDSCREEN TEMPERATURE SENSOR SIGNAL YEL WIRE YEL/BLU WIRE YEL/RED WIRE

A/C PRESS SENS A/C REFRIGERANT PRESS SENS SIG A/C REFRIGERANT PRESSURE SENSOR AIR TEMP SENS SIG AMBIENT AIR TEMPERATURE SENSOR BATT POS VOLT BATT POS VOLT COOLING FAN CTRL RELAY SPEED SIG BLK WIRE BLK/BLU WIRE BLK/BRN WIRE BLK/WHT WIRE BLU WIRE BLU/GRY WIRE BRN/RED WIRE CLUTCH RELAY CTRL COMPUTER DATA LINES SYSTEM COOL FAN FUSE DK BLU WIRE DK GRN WIRE EBOOST/COOL FAN LT FUSE ENG COOLANT TEMP SENS SIG ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT) ENGINE COOLANT TEMPERATURE SENSOR FUSE 9 GROUND HI SPEED GMLAN SERIAL DATA (-) 1 HOT AT ALL TIMES INSTRUMENT PANEL FUSE BLOCK LEFT COOLING FAN MOTOR (BEHIND LEFT SIDE OF RADIATOR) LOGIC NCA WIRE RED/BRN WIRE RED/YEL WIRE RELAY SPEED SIG RIGHT COOLING FAN MOTOR (BEHIND RIGHT SIDE OF RADIATOR) SENS LOW REF SIG GROUND UNDERHOOD FUSE BLOCK WHT WIRE WHT/BLK WIRE WHT/GRY WIRE

ACC WAKEUP SERIAL DATA AMBIENT LIGHT/ SUNLOAD SENSOR BATT POS VOLT BATTERY POSITIVE VOLTAGE BLK WIRE BLU/GRN WIRE BLU/GRY WIRE BODY CONTROL MODULE (UNDER FLOOR CONSOLE) DATA BUS 1 DATA BUS 11 DATA BUS 15 DATA BUS 4 DATA LINK CONNECTOR (LOWER LEFT SIDE OF DASH) DK BLU WIRE DK BLU/VIO WIRE DK BLU/YEL WIRE DK GRN WIRE DK GRN/BRN WIRE DK GRN/DK BLU WIRE DK GRN/GRY WIRE DK GRN/VIO WIRE DK GRN/WHT WIRE DK GRN/YEL WIRE FUSE 20 FUSE 25 FUSE 34 FUSE 5 GROUND GRY/LT GRN WIRE HI SPD GMLAN SERIAL DATA (+) 8 HI SPD GMLAN SERIAL DATA (+) 9 HI SPD GMLAN SERIAL DATA (-) (1) HI SPD GMLAN SERIAL DATA (-) (2) HI SPD GMLAN SERIAL DATA (-) 9 LOW SPD GMLAN SERIAL DATA HOT AT ALL TIMES IMMOBILIZER CONTROL MODULE INSTRUMENT PANEL FUSE BLOCK LEFT REAR WINDOW SWITCH LIN SERIAL LIN SERIAL DATA BUS 1 LIN SERIAL DATA BUS 11 LIN SERIAL DATA BUS 15 LIN SERIAL DATA BUS 2 LIN SERIAL DATA BUS 3 LIN SERIAL DATA BUS 4 LOGIC SUNROOF MOTOR LOGIC WINDSHIELD WIPER MOTOR LOW SPD GMLAN SERIAL DATA LOW SPD GMLAN SERIAL DATA 2 LT GRN WIRE RED/BRN WIRE RED/GRY WIRE RED/VIO WIRE RED/YEL WIRE RIGHT REAR WINDOW SWITCH SERIAL DATA COMM ENABLE SERIAL DATA GATEWAY MODULE (NEAR BODY CONTROL MODULE) VIO WIRE VIO/YEL WIRE WHT WIRE WHT/DK BLU WIRE WHT/GRN WIRE WHT/GRY WIRE

AUTO OFF BATT POS VOLT BLK WIRE BLK/BRN WIRE BLU/BRN WIRE BLU/WHT WIRE BODY CONTROL MODULE BRK APPLY SENS CTRL BRK APPLY SENS SIG BRL APPLY SENS LO REF BRN/DK GRN WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/WHT WIRE DK BLU/YEL WIRE DRV OUTSIDE REAR VIEW MIRROR PUDDLE LP CTRL FUSE 18 FUSE 21 FUSE 22 FUSE 8 GRN/VIO WIRE GRN/YEL WIRE GROUND GROUND DISTRIBUTION SYSTEM GRY WIRE GRY/BRN WIRE GRY/GRN WIRE GRY/VIO WIRE GRY/YEL WIRE HAZ LED DIMMING SIG HI SPD GMLAN SER DATA (-) 1 HAZ SW LEFT TURN SIG HAZ SW RIGHT TURN SIG HAZ SW SIG HEAD PARK HEADLAMP SW PARK LP SIG HEADLAMP SWITCH HI SPD GMLAN SER DATA (+) 1 HOT AT ALL TIMES INSTRUMENT PANEL FUSE BLOCK LEFT CORNERING LAMP LEFT FRONT SIDE MARKER LAMP LEFT FRONT TURN SIGNAL LAMP LEFT HEADLAMP ASSEMBLY LEFT PARK DAYTIME RUNNING LAMP LF TURN SIG LP CTRL LH CORNERING LP RLY CTRL LH PARK LP CTRL LR STOP LP CTRL LR STOP/TURN LP CTRL LT GRN WIRE NCA WIRE REAR LICENSE LP CTRL RED/BRN WIRE RED/DK BLU WIRE RED/DK GRN WIRE RED/GRY WIRE RED/WHT WIRE RF TURN SIG LP CTRL RH CORNERING LP RLY CTRL RH PARK LP CTRL RR STOP LP CTRL RR STOP/TURN LP CTRL STOP LP RLY COIL CTRL TURN SIGNAL/ MULTI-FUNCTION SWITCH VIO WIRE VIO/GRY WIRE VIO/WHT WIRE W/ HID W/O HID WHT WIRE WHT/YEL WIRE YEL/DK BLU WIRE YEL/GRY WIRE

B+ VOLT BLK WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM DK BLU/VIO WIRE DK GRN WIRE DK GRN/WHT WIRE DK GRN/YEL WIRE DOOR LOCK MTR STATUS SIG DOOR LOCK KEY SW UNLOCK SIG DOOR LOCKS SYSTEM DOWN DRIVER WINDOW MOTOR DRIVER WINDOW/OUTSIDE REAR VIEW MIRROR SWITCH EXPRESS FUSE 1 FUSE 2 GRY WIRE HOT AT ALL TIMES ILL INSTRUMENT PANEL FUSE BLOCK LEFT FRONT WINDOW DOWN SWITCH LEFT FRONT WINDOW EXPRESS SWITCH LEFT FRONT WINDOW UP SWITCH LEFT REAR WINDOW DOWN SWITCH LEFT REAR WINDOW EXPRESS SWITCH LEFT REAR WINDOW UP SWITCH LF DR AJAR SW SIG LOCKOUT IND LOCKOUT SWITCH LOGIC N/W BUS 3 PASSENGER WINDOW MOTOR PASSENGER WINDOW SWITCH RED/DK BLU WIRE RED/WHT WIRE RF DR AJAR SW SIG RIGHT FRONT WINDOW DOWN SWITCH RIGHT FRONT WINDOW EXPRESS SWITCH RIGHT FRONT WINDOW UP SWITCH RIGHT REAR WINDOW DOWN SWITCH RIGHT REAR WINDOW EXPRESS SWITCH RIGHT REAR WINDOW UP SWITCH SW DOWN SIG SW DRV DOWN SIG SW DRV EXP SIG SW DRV UP SIG SW EXPRESS SIG SW UP SIG UNDERHOOD FUSE BLOCK VIO/GRY WIRE W/O MEMORY W/ MEMORY WHT/VIO WIRE WNDW MIR SEAT FUSE YEL/BLK WIRE

1-VT 2-VT BATT POS VOLT BLK WIRE BLK/YEL WIRE BRN WIRE CELLULAR PHONE NAVIGATION, DIGITAL RADIO ANTENNA COAX COMPUTER DATA LINES SYSTEM DISPLAY DISPLAY SIG + DK GRN/BLK WIRE DK GRN/DK BLU WIRE DK GRN/WHT WIRE FUSE 31 GRY/GRN WIRE HOT AT ALL TIMES INFO DISPLAY MODULE INFOTAINMENT INSTRUMENT PANEL FUSE BLOCK LOGIC LOW SPEED GMLAN LVDS MEDIA DISC PLAYER MENU MUTE NEXT RADIO CONTROLS RED WIRE RED/LT BLU WIRE RED/VIO WIRE RED/WHT WIRE RIGHT STEERING WHEEL CONTROLS SWITCH SEEK DOWN SEEK UP SELECT SERIAL DATA 2 SERIAL DATA BUS 10 SERIAL DATA BUS 5 STEERING WHEEL AIR BAG COIL TALK USB VOL (-) W/ ONSTAR W/O ONSTAR W/ NAVIGATION W/O NAVIGATION WHT WIRE YEL WIRE

BATT POS VOLT BATT POST VOLT BLK WIRE BRN/DK BLU WIRE COMPUTER DATA LINES SYSTEM DIMMING CONTROL DK BLU WIRE DK BLU/BLK WIRE DK GRN WIRE DK GRN/BLK WIRE FUSE 39 FUSE 42 GROUND GRY/GRN WIRE GRY/VIO WIRE HOT AT ALL TIMES INFOTAINMENT CONTROL TOUCHPAD INSTRUMENT PANEL FUSE BLOCK LEFT FRONT DOOR SPEAKER LEFT FRONT TWEETER SPEAKER LEFT REAR DOOR SPEAKER LF SPEAKER (+) (1) LF SPEAKER SIG (-) 1 LR SPEAKER (+) CTRL LR SPEAKER SIG (-) MOST CONTROL MOST SERIAL DATA (+) MOST SERIAL DATA (-) GMLAN SERIAL DATA 2 RADIO RED/BLU WIRE RED/LT BLU WIRE RED/VIO WIRE RF SPEAKER (+) (1) RF SPEAKER SIG (-) 1 RIGHT FRONT DOOR SPEAKER RIGHT FRONT TWEETER SPEAKER RIGHT REAR DOOR SPEAKER RR SPEAKER (+) CTRL RR SPEAKER SIG (-) SIG GND WHT WIRE WHT/GRN WIRE WHT/VIO WIRE YEL WIRE YEL/BLK WIRE

BATT POS VOLT BLK WIRE COMPUTER DATA LINES SYSTEM DIMMING CONTROL DK BLU/BLK WIRE FUSE 39 FUSE 42 GRN/VIO WIRE GROUND GRY/BLK WIRE GRY/GRN WIRE GRY/VIO WIRE HOT AT ALL TIMES ILL INFOTAINMENT CONTROL TOUCHPAD INSTRUMENT PANEL FUSE BLOCK MOST CONTROL MOST SERIAL DATA (+) MOST SERIAL DATA (-) GMLAN SERIAL DATA 2 RED/BLU WIRE RED/LT BLU WIRE RED/VIO WIRE RIGHT FRONT DOOR SPEAKER RIGHT FRONT TWEETER SPEAKER RIGHT REAR DOOR SPEAKER RIGHT REAR WINDOW SHELF SPEAKER WHT WIRE WHT/GRN WIRE WHT/VIO WIRE YEL WIRE YEL/BLK WIRE

BATT POS VOLT BLK WIRE BLU/GRY WIRE BRN/DK BLU WIRE CENTER INSTRUMENT PANEL SPEAKER COMPUTER DATA LINES SYSTEM DISPLAY DISPLAY SIG + DK BLU WIRE DK BLU/YEL WIRE DK GRN WIRE DK GRN/BLK WIRE DK GRN/DK BLU WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE FUSE 16 FUSE 38 GRN/BLK WIRE GRY/GRN WIRE HOT AT ALL TIMES INFO DISPLAY MODULE INFOTAINMENT INSTRUMENT PANEL FUSE BLOCK LEFT FRONT DOOR SPEAKER LEFT FRONT TWEETER SPEAKER LEFT REAR DOOR SPEAKER LEFT SUBWOOFER SPEAKER LOGIC LOW SPEED GMLAN LVDS MEDIA DISC PLAYER RADIO CONTROLS RED/BRN WIRE RED/LT BLU WIRE RED/VIO WIRE RED/YEL WIRE REPLICATED SERIAL DATA 2 SERIAL DATA BUS 10 SERIAL DATA BUS 5 SIG VIO/DK BLU WIRE YEL/WHT WIRE

BATT POS VOLT BLK WIRE COMPUTER DATA LINES SYSTEM DIMMING CONTROL DK BLU/BLK WIRE FUSE 39 FUSE 42 GRN/VIO WIRE GROUND GRY/BLK WIRE GRY/GRN WIRE GRY/VIO WIRE HOT AT ALL TIMES INFOTAINMENT CONTROL TOUCHPAD INSTRUMENT PANEL FUSE BLOCK LEFT REAR TRIM PANEL SPEAKER MOST CONTROL MOST SERIAL DATA (+) MOST SERIAL DATA (-) GMLAN SERIAL DATA 2 RED/BLU WIRE RED/LT BLU WIRE RED/VIO WIRE RIGHT FRONT DOOR SPEAKER RIGHT FRONT TWEETER SPEAKER RIGHT REAR DOOR SPEAKER RIGHT REAR TRIM PANEL SPEAKER RIGHT SUBWOOFER SPEAKER WHT WIRE WHT/BLK WIRE WHT/GRN WIRE WHT/VIO WIRE YEL WIRE YEL/BLK WIRE YEL/BRN WIRE