Cadillac XT4 I (2018-2023) underhood fuse block Wiring diagrams

AUTO LEVEL CTRL AUTO LEVEL CTRL POS SENS LOW REF AUTO LEVEL CTRL POS SENS SIG AUXILIARY UNDERHOOD FUSE BLOCK BATTERY FUSE BLOCK BATTERY POSITIVE VOLTAGE BEAM RLY CTRL BLK WIRE BLK/BRN WIRE BLK/GRY WIRE BLK/WHT WIRE BLU WIRE BLU/BLK WIRE BLU/GRN WIRE BLU/GRY WIRE BODY CONTROL MODULE BRN WIRE BRN/WHT WIRE BRN/YEL WIRE CAN BUS HIGH 3 SERIAL DATA CAN BUS HIGH SERIAL DATA CAN BUS LOW 3 SERIAL DATA CAN BUS LOW SERIAL DATA COMPUTER DATA LINES SYSTEM DATA 1 (+) FRONT AXLE LEVEL FRONT AXLE LEVEL SENS LOW REF FRONT AXLE LEVEL SENSOR SIGNAL FRONT SUSPENSION HEIGHT SENSOR GMLAN SERIAL GROUND HDLP LOW HEADLAMP CONTROL MODULE HEADLAMP HIGH BEAM RELAY HI SPD GMLAN SERIAL DATA (+) 8 HIGH SPD HOT AT ALL TIMES LEFT HEADLAMP ASSEMBLY LEFT HEADLAMP LEVELING ACTUATOR NCA WIRE POWER DISTRIBUTION SYSTEM REAR SUSPENSION HEIGHT SENSOR RED/YEL WIRE RIGHT HEADLAMP ASSEMBLY RIGHT HEADLAMP LEVELING ACTUATOR SERIAL DATA COMM ENABLE UNDERHOOD FUSE BLOCK WHT WIRE WHT/BLU WIRE WHT/GRY WIRE WHT/RED WIRE YEL WIRE YEL/GRY WIRE

ACC WAKEUP SER DATA BATTERY FUSE BLOCK BATTERY POSITIVE VOLTAGE BLK WIRE BLU WIRE BLU/YEL WIRE BRAKE FLUID LEVEL SENS SIG BRAKE FLUID LEVEL SWITCH BRAKE SYSTEM CONTROL MODULE COMPUTER DATA LINES SYSTEM GRN/GRY WIRE GRN/VIO WIRE GRN/YEL WIRE GROUND GRY WIRE GRY/BLK WIRE GRY/BRN WIRE GRY/WHT WIRE GRY/YEL WIRE HI SPD GMLAN SER DATA (-) 2 HI SPD GMLAN SERIAL DATA (-) (1) HI SPD GMLAN SERIAL DATA (-) (2) HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED LEFT FRONT WHEEL SPEED SENSOR LEFT REAR WHEEL SPEED SENSOR LF WHEEL SPD SENS CTRL LF WHEEL SPD SENS SIG LOC INTERCONNECT NETWORK BUS 31 LR PARK BRAKE MOTOR APPLY CTRL LR PARK BRAKE MOTOR LOW REF LR WHEEL SPD SENS CTRL LR WHEEL SPD SENS SIG NCA WIRE RED/WHT WIRE RED/YEL WIRE RF WHEEL SPD SENS CTRL RF WHEEL SPD SENS SIG RIGHT FRONT WHEEL SPEED SENSOR RIGHT REAR WHEEL SPEED SENSOR RR PARK BRAKE MOTOR APPLY CTRL RR PARK BRAKE MOTOR LOW REF RR WHEEL SPD SENS CTRL RR WHEEL SPD SENS SIG RUN/CRANK IGNITION 1 VOLTAGE UNDERHOOD FUSE BLOCK VIO WIRE VIO/GRY WIRE VIO/YEL WIRE WHT WIRE WHT/BLK WIRE YEL WIRE

AIR QUALITY SENSOR SIGNAL AMBIENT LIGHT/SUNLOAD SENSOR (TOP CENTER OF DASH) BATT POS VOLT BLK WIRE BLK/BLU WIRE BLK/WHT WIRE BLOWER MOTOR BLOWER MOTOR SPEED CTRL BLOWER SPEED FEEDBACK SIG BLU WIRE BLU/BRN WIRE BLU/GRY WIRE BLU/WHT WIRE BLU/YEL WIRE BODY CONTROL MODULE BRN WIRE COMPUTER DATA LINES SYSTEM DEFOGGER SYSTEM DOOR LOCKS, ANTI-THEFT SYSTEMS ELECTRIC VARIABLE DISPLACEMENT CTRL ELECTRIC VARIABLE DISPLACEMENT SUPPLY ENGINE COOLANT PUMP GRN WIRE GRN/BLK WIRE GRN/BLU WIRE GRN/YEL WIRE GROUND GRY WIRE GRY/BLU WIRE GRY/GRN WIRE HEADLIGHTS SYSTEM HI SPD GMLAN SER DATA (+) 1 HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED HUMIDITY SENSOR SIGNAL HUMIDITY TEMPERATURE SENSOR SIGNAL HUMIDITY/WINDSCREEN TEMP SENSOR LOW REFERENCE HVAC CONTROL MODULE (BEHIND CENTER OF DASH) INSIDE AIR TEMPERATURE SENSOR SIGNAL LOCAL INTERCONNECT NETWORK SERIAL DATA BUS 19 LOCAL INTERCONNECT NETWORK SERIAL DATA BUS 9 LOGIC LOGIC WINDSHIELD TEMPERATURE, INSIDE MOISTURE SENSOR LOW SPEED GMLAN SERIAL DATA REAR DEFOG RELAY CTRL RED WIRE RED/BLU WIRE RED/BRN WIRE RED/GRY WIRE RED/PPL WIRE RED/VIO WIRE RED/WHT WIRE RUN/CRANK IGNITION 1 VOLTAGE SIGNAL GROUND SOLAR SENSOR LOW REFERENCE SPEED CTRL TWILIGHT SENTINEL DELAY SIGNAL UNDERHOOD AUXILIARY FUSE BLOCK UNDERHOOD FUSE BLOCK VIO/GRY WIRE VIO/WHT WIRE WHT WIRE WINDSCREEN TEMP SENSOR SIGNAL YEL WIRE YEL/BLU WIRE YEL/RED WIRE YEL/VIO WIRE

A/C COMPRESSOR A/C COMPRESSOR CLUTCH A/C COMPRESSOR SOLENOID VALVE A/C IND A/C SWITCH AIR QUALITY SENSOR AUTO IND UPPER AIR OUTLET IND AUTO SWITCH BLK WIRE BLK/WHT WIRE BLU/BRN WIRE BLU/YEL WIRE BRN/GRN WIRE COMPUTER DATA LINES SYSTEM COOLING FAN MOTOR DATA BUS 9 DEFROST, LOWER AIR OUTLET SWITCH FAN DOWN SWITCH FAN UP SWITCH GRN/BLU WIRE GRN/YEL WIRE GRY/GRN WIRE HOT AT ALL TIMES HVAC CONTROLS INSTRUMENT PANEL FUSE BLOCK LEFT TEMPERATURE DOWN SWITCH LEFT TEMPERATURE UP SWITCH LOGIC LOWER AIR OUTLET IND LOWER AIR OUTLET SWITCH ON/OFF IND ON/OFF SWITCH POWER SUPPLY TRANSFORMER RECIRCULATION IND RECIRCULATION SWITCH RED/BLU WIRE RED/GRY WIRE RED/WHT WIRE RED/YEL WIRE RIGHT TEMPERATURE DOWN SWITCH RIGHT TEMPERATURE UP SWITCH SERIAL SPLY VOLT 1 SYNC SWITCH UNDERHOOD FUSE BLOCK UPPER AIR OUTLET SWITCH VIO/GRY WIRE VIO/WHT WIRE W/ AIR IONIZER WHT WIRE WINDSHIELD DEFROST IND SYNC IND DEFROST, LOWER AIR OUTLET IND WINDSHIELD DEFROST SWITCH

A/C COMPRESSOR CLUTCH RELAY A/C EVAPORATOR TEMPERATURE SENSOR AIR RECIRCULATION DOOR ACTUATOR AIR TEMP DOOR CONTROL AIR TEMP DOOR CONTROL LOW REFERENCE AIR TEMP DOOR POSITION SIG BLK/WHT WIRE BLK/YEL WIRE BLU/BRN WIRE BLU/YEL WIRE BRN/BLU WIRE BRN/GRN WIRE COMPUTER DATA LINES SYSTEM DRIVER INFORMATION CENTER DISPLAY ENGINE COOLANT TEMPERATURE GAUGE ENGINE COOLANT TEMPERATURE IND ETHER NET BUS 7(+) ETHER NET BUS 7(-) GND EVAP CORE TEMP SENSOR SIG GRN WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/GRN WIRE GRY/RED WIRE HOT AT ALL TIMES HOT W/ ENGINE CONTROLS IGNITION RELAY ENERGIZED HVAC CONTROL MODULE (BEHIND CENTER OF DASH) IGN INSTRUMENT CLUSTER LEFT AIR TEMPERATURE DOOR ACTUATOR LOGIC MODE 1 VALVE POSITION SENSOR SIG MODE DOOR ACTUATOR MODE DOOR CONTROL PASSENGER AIR TEMP DOOR CONTROL PASSENGER AIR TEMP DOOR POSITION SIG PASSENGER AIR TEMP MOTOR CONTROL RECIRCULATION DOOR CONTROL RECIRCULATION DOOR POSITION SIG RIGHT AIR TEMPERATURE DOOR ACTUATOR UNDERHOOD FUSE BLOCK VIO WIRE VIO/BLU WIRE VIO/GRN WIRE VIO/GRY WIRE WHT WIRE WHT/BLK WIRE WHT/GRN WIRE WHT/GRY WIRE YEL/BLK WIRE YEL/BRN WIRE

A/C COMPRESSOR CLTH RLY CTRL A/C REFRIGERANT PRESS SENS SIG A/C REFRIGERANT PRESSURE SENSOR AMBIENT AIR TEMPERATURE SENSOR BLK WIRE BLK/GRN WIRE BLK/GRY WIRE BLK/WHT WIRE BLK/YEL WIRE BLOCK ENGINE COOLANT FLOW CONTROL VALVE BLU WIRE BLU/BRN WIRE BLU/GRY WIRE BLU/RED WIRE BRN/GRY WIRE COMPUTER DATA LINES SYSTEM COOLANT DIVERTER VALVE ACTR CTRL HI COOLANT DIVERTER VALVE ACTR CTRL LO COOLANT DIVERTER VALVE POSI SIG COOLING TEMP SNS 2 SIG ENG CTRL SENSS 5 VOLT REF (1) ENG CTRL SENSS 5 VOLT REF (2) ENG CTRL SENSS 5 VOLT REF (3) ENG CTRL SENSS LOW REF (1) ENG CTRL SENSS LOW REF (2) ENGINE CONTROL MODULE (ENGINE COMPT, RIGHT SIDE OF BATTERY) ENGINE COOLANT BYPASS VALVE ENGINE COOLANT FLOW CONTROL VALVE ENGINE COOLANT TEMPERATURE SENSOR 3 ENGINE COOLANT TEMPERATURE SENSOR 4 GRN WIRE GRN/BLK WIRE HEATER CORE INLET TEMP SIG HEATER CORE OUTLET TEMP SIG HI SPEED GMLAN SERIAL DATA (+) 1 OUTSIDE AMBIENT AIR TEMPERATURE SENS SIG HI SPEED GMLAN SERIAL DATA (-) 1 HOT W/ IGNITION MAIN RELAY ENERGIZED LOGIC RADIATOR COOLANT TEMPERATURE SENSOR RIGHT SIDE OF RADIATOR) RUN/CRANK IGNITION 1 VOLTAGE SIG GND UNDERHOOD FUSE BLOCK VIO/BLU WIRE VIO/GRN WIRE VIO/GRY WIRE WHT WIRE WHT/GRY WIRE WHT/RED WIRE YEL/BLK WIRE

BATTERY POSITIVE VOLTAGE BLK WIRE BLK/WHT WIRE BRN WIRE BRN/VIO WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM DRIVER OUTSIDE REAR VIEW MIRROR GLASS DRIVER OUTSIDE REAR- VIEW MIRROR GRN WIRE GRN/YEL WIRE GRY/GRN WIRE HOT AT ALL TIMES HVAC CONTROL MODULE HVAC CONTROLS INSTRUMENT PANEL FUSE BLOCK LIN BUS 9 LOGIC LOW SPEED GMLAN SERIAL DATA NETWORK SERIAL DATA BUS 9 PASSENGER OUTSIDE REAR VIEW MIRROR PASSENGER OUTSIDE REAR VIEW MIRROR GLASS REAR DEFOG RELAY CONTROL REAR DEFOGGER GRID REAR DEFOGGER IND REAR DEFOGGER RELAY REAR DEFOGGER SWITCH RED/WHT WIRE SIG GND UNDERHOOD FUSE BLOCK

AUXILIARY UNDERHOOD FUSE BLOCK BATTERY FUSE BLOCK BLK WIRE BLU/BRN WIRE BRN/YEL WIRE GRY/BLU WIRE HEADLAMP HIGH BEAM RELAY HOT AT ALL TIMES LEFT HEADLAMP ASSEMBLY LEFT HEADLAMP COOLING FAN LEFT HEADLAMP MULTI-FUNCTION LED LEFT HEADLAMP/ CORNERING LAMP CONTROL MODULE LEFT HIGH BEAM HEADLAMP LEFT LOW BEAM HEADLAMP LEFT PARK DAYTIME RUNNING LAMP NCA WIRE RED/VIO WIRE RED/YEL WIRE UNDERHOOD FUSE BLOCK WHT WIRE YEL WIRE YEL/GRY WIRE

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

BLK WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM DOOR LOCKS SYSTEM DOWN DRIVER WINDOW MOTOR DRIVER WINDOW SWITCH EXPRESS GRN WIRE GRN/WHT WIRE GRN/YEL WIRE 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 LOCKOUT IND LOCKOUT SWITCH LOGIC PASSENGER WINDOW MOTOR PASSENGER WINDOW SWITCH POWER DISTRIBUTION SYSTEM RED/BLU WIRE RED/BRN WIRE RED/WHT WIRE 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 UNDERHOOD FUSE BLOCK VIO/GRY WIRE YEL/BLK WIRE