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

BATTERY FUSE BLOCK BLK WIRE BRN WIRE BRN/VIO WIRE BRN/YEL WIRE DK GRN/YEL WIRE DRIVER OUTSIDE REAR VIEW MIRROR GLASS DRIVER OUTSIDE REAR- VIEW MIRROR FUSE 2 HOT AT ALL TIMES HTD MIR FUSE HVAC CONTROL MODULE (BEHIND HVAC CONTROLS) HVAC CONTROLS LEFT "C" PILLAR) LEFT REAR WINDOW DEFOGGER NOISE FILTER LOGIC NETWORK SERIAL DATA BUS 9 PASSENGER OUTSIDE REAR VIEW MIRROR PASSENGER OUTSIDE REAR VIEW MIRROR GLASS REAR DEFOG FUSE REAR DEFOG RLY CTRL NETWORK SERIAL DATA BUS 9 REAR DEFOGGER GRID REAR DEFOGGER IND REAR DEFOGGER RELAY REAR DEFOGGER SWITCH RED/YEL WIRE RIGHT REAR WINDOW DEFOGGER NOISE FILTER UNDERHOOD FUSE BLOCK YEL WIRE

BLK WIRE BODY CONTROL MODULE BRN WIRE BRN/WHT WIRE GRN WIRE GRY WIRE HORN FUSE HORN RELAY HORN RELAY CONTROL HORN SWITCH HORN SWITCH SIGNAL HOT AT ALL TIMES LEFT HORN RED WIRE RIGHT HORN STEERING WHEEL AIR BAG COIL UNDERHOOD FUSE BLOCK WHT WIRE

"CHECK ENGINE" IND CTRL ABS IND. ADAPTIVE CRUISE IND AFL IND AIR BAG IND AUTO STOP IND BATT POS VOLT BLK WIRE BRAKE IND BRAKE WARNING IND BRN WIRE CHARGING IND COMPUTER DATA LINES SYSTEM CRUISE IND DATA BUS 3 DATA BUS 4 DK GRN/BLK WIRE DK GRN/GRY WIRE DK GRN/YEL WIRE DOOR OPEN IND DOWN DRIVER DOOR LATCH ASSEMBLY DRIVER INFORMATION CENTER DISPLAY ECS IND ENGINE CONTROLS SYSTEM ENGINE COOLANT TEMPERATURE GAUGE ENGINE COOLANT TEMPERATURE IND ENGINE OIL PRESSURE IND ESC OFF IND FORWARD COLLISION ALERT LED CTRL FRONT FOG LAMP IND FUEL GAUGE FUSE 21 FUSE 39 GRY WIRE GRY/LT GRN WIRE GRY/VIO WIRE HEAD-UP DISPLAY CIRCUIT HEAD-UP DISPLAY SIG HIGH BEAM LAMP IND HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED IGNITION 1 VOLT ILLUMINATION INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK KM/H IND LANE DEPARTURE WARNING IND LANE KEEPING ASSIST IND LED DISPLAY DIMMING CTRL LEFT LEFT REAR DOOR LATCH ASSEMBLY LEFT REAR WINDOW SWITCH LEFT TURN IND LF DR AJAR LIN SERIAL DATA BUS 12 LOGIC LOGIC DRIVER WINDOW MOTOR LOW SPD GMLAN SER DATA 2 LR DR AJAR LVDS BK MALFUNCTION IND MIL SS FUSE MOST SERIAL DATA (+) MPH IND NAVIGATION SYSTEM PARK BRAKE IND PARK IND PARK LAMP IND REAR FOG LAMP IND RED/DK BLU WIRE RED/LT BLU WIRE RIGHT RIGHT STEERING WHEEL CONTROLS SWITCH RIGHT TURN IND SEAT BELT IND SECURITY IND SEEK DOWN SEEK UP SELECT SERVICE PARK BRAKE IND SPEEDOMETER SW SIG TACHOMETER TIRE PRESSURE IND TRACTION CONTROL OFF IND UNDERHOOD FUSE BLOCK VIO WIRE VIO/GRY WIRE WHT WIRE WHT/GRN WIRE

BATT POS VOLT BLK WIRE BLU/GRY WIRE BODY CONTROL MODULE COLLISION ALERT INDICATORS COLLISION ALERT SWITCH COMM ENABLE COMPUTER DATA LINES SYSTEM DK BLU WIRE FRONT VIEW CAMERA FUSE 40 GMLAN SERIAL DATA (-) 8 GROUND GRY WIRE GRY/GRN WIRE GRY/LT GRN WIRE GRY/WHT WIRE HI SPD GMLAN SERIAL DATA (-) (1) HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK INSTRUMENT PANEL MULTI- FUNCTION SWITCH IP BODY IGN FUSE LANE DEPARTURE WARNING DISABLE LANE DEPARTURE WARNING DISABLE SWITCH LANE DEPARTURE WARNING IND LANE DEPARTURE WARNING IND CTRL LEFT STEERING WHEEL CONTROLS SWITCH LO SPEED GMLAN SERIAL DATA 2 LOGIC LOW SPEED GMLAN LT GRN WIRE RED WIRE RED/DK GRN WIRE STEERING WHEEL AIR BAG COIL SW REF SW SIG UNDERHOOD FUSE BLOCK UP/DOWN SW SIG VIO/GRY WIRE WHT WIRE WHT/DK BLU WIRE WHT/GRY WIRE

BLK WIRE BLU WIRE BLU/GRY WIRE BLU/VIO WIRE BRN WIRE CLOSE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/WHT WIRE DOWN EXPRESS CLOSE EXPRESS DOWN EXPRESS OPEN EXPRESS UP FRONT OVERHEAD CONSOLE ASSEMBLY GRY WIRE HOT AT ALL TIMES LOGIC LT BLU WIRE ORG/ WIRE PNK WIRE PPL PPL/WHT WIRE RED/GRY WIRE RED/WHT WIRE SUNROOF FUSE SUNROOF MOTOR (FRONT CENTER OF ROOF) SUNROOF SUNSHADE MOTOR TAN WIRE UNDERHOOD FUSE BLOCK VIO WIRE WHT WIRE YEL WIRE

BLK WIRE CAMERA SIG 2 GROUND GRY WIRE GRY/YEL WIRE HOT W/ IGNITION MAIN RELAY ENERGIZED HUMAN MACHINE INTERFACE CONTROL MODULE LOW REF NCA WIRE REAR VIEW CAMERA (ABOVE LICENSE PLATE) RED WIRE RUN/CRANK IGN 1 VOLT RVC/ VENT FUSE UNDERHOOD FUSE BLOCK VIO/WHT WIRE WHT WIRE WHT/BLU WIRE

AJAR SW SIG 1 B+ VOLT BLK WIRE BODY CONTROL MODULE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/YEL WIRE DRIVER INFORMATION CENTER DISPLAY EXTERIOR REAR COMPARTMENT LID UNLATCH SWITCH FUSE 41 20 GRY/LT GRN WIRE GRY/YEL WIRE HANDLE SW OPEN SIG HIGH SPEED GMLAN SERIAL DATA (-) (1) HOT AT ALL TIMES INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK INTERIOR REAR COMPARTMENT LID UNLATCH SWITCH INTERIOR RELEASE SIG LOGIC LOW SPD GMLAN SERIAL DATA 2 LOW SPEED GMLAN SERIAL DATA (+) 1 MTR RELEASE CTRL REAR CLOSR FUSE REAR COMPARTMENT LID LATCH REAR COMPARTMENT LID UNLATCH RELAY RED/BRN WIRE UNDERHOOD FUSE BLOCK VIO/DK BLU WIRE VIO/GRY WIRE W/ STOP/START SYSTEM W/O STOP/START SYSTEM WHT WIRE YEL WIRE YEL/DK BLU WIRE

A/C COMP CLUTCH RLY CTRL A/C COMPRESSOR CLUTCH RELAY A/C REFRIGERANT PRESSURE SENS SIG ACC WAKEUP SERIAL DATA AERO SHUTTER FUSE AIR CONDITIONING SYSTEM AIR TEMP SENS SIG ANTI-THEFT SYSTEM APP LOW REF 1 APP LOW REF 2 APP SIG (1) APP SIG (2) BATT POS VOLT BATTERY FUSE BLOCK BLK/DK BLU WIRE BLK/RED WIRE BLK/VIO WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/GRY WIRE BRK POS SENS LOW REF BRK POS SENS SIG BRK VACUUM SENS SIG BRN/GRY WIRE BRN/RED WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM COOLING FAN CTRL RELAY CTRL COOLING FANS SYSTEM CRUISE CONTROL SYSTEM CRUISE/ETC/TCC BRK SIG DATA OUT SIG DK BLU WIRE DK BLU/BLK WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE ECM IGN FUSE ENGINE CONTROL MODULE ENGINE CONTROLS IGNITION RELAY ENGINE IND CTRL EVAP CANISTER VENT SOL CTRL EVAPORATIVE EMISSION VENT SOLENOID VALVE FUEL TANK PRESSURE SENS SIG FUSE 2 FUSED SPLY 1 FUSED SPLY 2 FUSED SPLY 3 GRY WIRE HI SPD GMLAN SERIAL DATA (+) (3) HI SPD GMLAN SERIAL DATA (-) (1) HOOD STATUS A SIG HOT AT ALL TIMES HUMIDITY SENS SIG IGN COIL FUSE LEFT CORNERING LAMP RELAY LT GRN/WHT WIRE MASS AIR FLOW SENS SIG PARK/NEUTRAL SIG (1) PWR/TRN OFF ENG FUSE PWR/TRN ON ENG FUSE RED/BRN WIRE RED/YEL WIRE RIGHT CORNERING LAMP RELAY RLY COIL CTRL RUN/CRANK IGN 1 VOLT SIG GND STARTER ENABLE RELAY CTRL STARTING/CHARGING SYSTEM TRANSMISSION CONTROL SYSTEM UNDERHOOD FUSE BLOCK VIO/DK BLU WIRE VIO/LT GRN WIRE VIO/YEL WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/GRY WIRE WHT/LT GRN WIRE WHT/RED WIRE YEL WIRE YEL/BLK WIRE YEL/RED WIRE YEL/VIO WIRE YEL/WHT WIRE

BANK 1 SENSOR 2 HEATED OXYGEN SENSOR BANK 2 SENSOR 2 HEATED OXYGEN SENSOR BLK/BRN WIRE BLK/GRN WIRE BLK/LT GRN WIRE BLK/VIO WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/WHT WIRE BODY CONTROL MODULE (UNDER FLOOR CONSOLE) BRK APPLY BRK APPLY SENS CTRL BRK APPLY SENS SIG BRN/GRY WIRE BRN/WHT WIRE CANISTER VENT SOL FUSE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/WHT WIRE DK BLU/YEL WIRE ECM IGN FUSE FUEL TANK PRESSURE SENSOR FUSE 9 GRY WIRE GRY/RED WIRE GRY/WHT WIRE HI SPD GMLAN HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED INSTRUMENT PANEL FUSE BLOCK LT GRN/WHT WIRE MANIFOLD ABSOLUTE PRESSURE SENSOR NCA WIRE RED/BRN WIRE SENS LOW REF SERIAL DATA (-) (1) UNDERHOOD FUSE BLOCK VIO/DK BLU WIRE VIO/LT GRN WIRE WHT WIRE WHT/BRN WIRE WHT/DK BLU WIRE WHT/RED WIRE WHT/YEL WIRE YEL/DK BLU WIRE YEL/RED WIRE YEL/WHT WIRE

ACC WAKEUP BATT POS VOLT BLK WIRE BLK/GRN WIRE BLK/GRY WIRE BLK/LT GRN WIRE BLK/VIO WIRE BLK/YEL WIRE BLU/VIO WIRE BLU/WHT WIRE BRN/DK BLU WIRE BRN/WHT WIRE COMPUTER DATA LINES DATA OUT SIG DK BLU WIRE DK BLU/BLK WIRE DK BLU/GRY WIRE DK BLU/VIO WIRE DK BLU/WHT WIRE FUEL LEVEL SENSOR FUEL MDL FUSE FUEL PUMP FUEL PUMP CTRL FUEL PUMP DRIVER CONTROL MODULE FUEL PUMP, LEVEL SENSOR ASSEMBLY (IN FUEL TANK) GRY WIRE GRY/WHT WIRE HI SPD GMLAN HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED IGN 1 VOLT KNOCK SENSOR #2 KNOCK SENSOR 1 LOW REF LT GRN/DK BLU WIRE MIL SS FUSE NCA WIRE PRIMARY FUEL LEVEL SENSOR RED/VIO WIRE SECONDARY FUEL LEVEL SENSOR FUEL LEVEL SENSOR ASSEMBLY SERIAL DATA SERIAL DATA (+) (3) SHIELD GND SYSTEM UNDERHOOD FUSE BLOCK VIO/DK BLU WIRE VIO/GRY WIRE VIO/WHT WIRE VIO/YEL WIRE WHT WIRE WHT/BRN WIRE WHT/GRY WIRE WHT/RED WIRE WHT/YEL WIRE YEL WIRE YEL/DK BLU WIRE YEL/WHT WIRE