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

BATT POS VOLT BLK WIRE BLU/VIO WIRE COMPUTER DATA LINES SYSTEM DRIVER OUTSIDE REAR VIEW MIRROR GLASS DRIVER OUTSIDE REAR- VIEW MIRROR DRIVER SIDE OBJECT DETECTION INDICATOR GRN WIRE GROUND GRY WIRE GRY/YEL WIRE HOT AT ALL TIMES INSTRUMENT PANEL FUSE BLOCK LEFT SIDE OBJECT SENSOR MODULE LH SIDE LED CTRL LOW SPEED GMLAN SERIAL DATA PASSENGER OUTSIDE REAR VIEW MIRROR PASSENGER OUTSIDE REAR VIEW MIRROR GLASS PASSENGER SIDE OBJECT DETECTION INDICATOR POWER SUPPLY TRANSFORMER RED/GRN WIRE RED/GRY WIRE RED/YEL WIRE RH SIDE LED CTRL RIGHT SIDE OBJECT SENSOR MODULE SIDE OBJ DETEC CAN SERIAL DATA (-) SIDE OBJECT DETECTION CAN SERIAL DATA (-) SUPPLY VOLTAGE 1 UNDERHOOD FUSE BLOCK WHT WIRE

BATT POS VOLT BATTERY BATTERY FUSE BLOCK BATTERY SENSOR FUSE HOLDER BATTERY SENSOR MODULE BLK WIRE BLK/WHT WIRE BLU WIRE BODY CONTROL MODULE BRN WIRE CHARGE IND CHARGE IND CTRL COMPUTER DATA LINES SYSTEM DRIVER INFORMATION CENTER DISPLAY ENGINE CONTROL MODULE FUSE GENERATOR GENERATOR FIELD DUTY CYCLE SIG GRN/VIO WIRE GRY WIRE GRY/GRN WIRE HIGH SPEED GMLAN SERIAL DATA (-) (1) HOT W/ IGNITION MAIN RELAY ENERGIZED INSTRUMENT CLUSTER LOCAL INTERCONNECT NETWORK SERIAL DATA BUS 21 LOGIC LOW SPEED GMLAN SERIAL DATA 2 NCA WIRE RED/WHT WIRE RED/YEL WIRE RUN/CRANK IGNITION 1 VOLT SIG GND STARTER MOTOR UNDERHOOD FUSE BLOCK VIO WIRE VIO/GRY WIRE WHT WIRE

AIR IONIZER (ENGINE COMPARTMENT, IN HVAC HOUSING) BATT POS VOLT BLK WIRE BLK/WHT WIRE BLU/BLK WIRE BLU/BRN WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/WHT WIRE BLU/YEL WIRE COMMUNICATION ENABLE DATA LINK CONNECTOR (UNDER LEFT SIDE OF DASH) DRIVER SEAT BOLSTER MEMORY CONTROL MODULE DRIVER SEAT MASSAGE SWITCH GRN WIRE GRN/BLU WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/GRN WIRE HI SPD GMLAN HI SPD GMLAN SERIAL DATA (+) 8 HI SPD GMLAN SERIAL DATA (+) 9 HI SPD GMLAN SERIAL DATA (-) 11 HI SPD GMLAN SERIAL DATA (-) 12 HI SPD GMLAN SERIAL DATA (-) 13 HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED HVAC CONTROL MODULE INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE INSTRUMENT PANEL FUSE BLOCK LO SPD GMLAN LO SPD GMLAN SERIAL DATA LO SPD GMLAN SERIAL DATA 2 LO SPD GMLAN SERIAL DATA 3 LOCAL INTERCONNECT LOCAL INTERCONNECT NETWORK BUS 19 LOGIC NETWORK BUS 13 NETWORK BUS 19 ORG/ WIRE RED/GRY WIRE RED/VIO WIRE SERIAL DATA SERIAL DATA 2 SERIAL DATA GATEWAY MODULE SIG GND STEERING COLUMN LOCK MODULE STEERING WHEEL AIR BAG COIL STEERING WHEEL HEATING CONTROL MODULE UNDERHOOD FUSE BLOCK VIO/GRY WIRE W/ MASSAGE SEAT WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/GRY WIRE

ACCESSORY WAKEUP ACCESSORY WAKEUP SERIAL DATA ACTIVE GRILLE AIR SHUTTER ACTUATOR BATTERY SENSOR MODULE BLU WIRE BLU/BLK WIRE BLU/BRN WIRE BLU/YEL WIRE BRAKE SYSTEM CONTROL MODULE COOLING FAN MOTOR FUEL PUMP DRIVER CONTROL MODULE GRN/BLK WIRE GRN/VIO WIRE GRN/WHT WIRE HI SPD GMLAN HI SPEED GMLAN HI SPEED GMLAN SERIAL DATA (+) (2) HI SPEED GMLAN SERIAL DATA (-) 1 LOCAL INTERCONNECT LOCAL INTERCONNECT NETWORK SERIAL BUS 21 MULTIFUNCTION INTAKE AIR SENSOR NETWORK SERIAL BUS 21 NETWORK SERIAL BUS 22 NETWORK SERIAL BUS 24 POWER STEERING CONTROL MODULE SERIAL DATA SERIAL DATA (+) (3) SERIAL DATA (-) (1) SERIAL DATA (-) 7 SERIAL DATA COMMUNICATION ENABLE TRANSMISSION CONTROL MODULE (ON TOP FRONT OF TRANSMISSION) TRANSMISSION RANGE SELECTOR CONTROLS UNDERHOOD FUSE BLOCK VIO/YEL WIRE WHT WIRE WHT/BLU WIRE

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 BRN/BLU 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 DRIVER INFORMATION CENTER DISPLAY ENG CTRL SENSS 5 VOLT REF (2) 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 COOLANT FLOW CONTROL VALVE ENGINE COOLANT TEMPERATURE GAUGE ENGINE COOLANT TEMPERATURE IND ETHER NET BUS 7(+) ETHER NET BUS 7(-) GND GRN/BLK WIRE GRY/BLU WIRE HEATER CORE OUTLET TEMP SIG HI SPEED GMLAN SERIAL DATA (-) 1 HOT W/ ENGINE CONTROLS IGNITION RELAY ENERGIZED HOT W/ IGNITION MAIN RELAY ENERGIZED IGN INSTRUMENT CLUSTER LOGIC LOW REF RUN/CRANK IGNITION 1 VOLTAGE SENSOR 2 SIG SIG GND TEMP SIG UNDERHOOD FUSE BLOCK VIO WIRE VIO/BLU WIRE VIO/GRN WIRE VIO/GRY WIRE WHT WIRE WHT/RED WIRE YEL/BLK WIRE

ALERT LED CTRL BATT POS VOLT BLK/WHT WIRE BLU WIRE BLU/GRY WIRE BODY CONTROL MODULE BRN/BLU WIRE COLLISION ALERT INDICATORS COLLISION ALERT SWITCH COMM ENABLE COMPUTER DATA LINES SYSTEM DAY LED CTRL ETHERNET BUS 7 (-) FORWARD COLLISION ALERT SWITCH GRN WIRE GROUND GRY WIRE GRY/GRN WIRE GRY/WHT WIRE HI SPD GMLAN (-) 1 HI SPD GMLAN SERIAL DATA (-) (1) HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED IGN 1 VOLT INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK INSTRUMENT PANEL MULTI- FUNCTION SWITCH LANE DEPARTURE WARNING ASSIST IND LANE DEPARTURE WARNING ASSIST SWITCH LANE DEPARTURE WARNING DISABLE LANE DEPARTURE WARNING IND LANE DEPARTURE WARNING IND CTRL LEFT STEERING WHEEL CONTROLS SWITCH LO SPD GMLAN SERIAL DATA LOGIC LOW SPEED GMLAN SERIAL DATA 2 LT BLU WIRE POWER SUPPLY TRANSFORMER RED WIRE RED/GRN WIRE RED/GRY WIRE RED/YEL WIRE STEERING WHEEL AIR BAG COIL SUPPLY VOLTAGE 1 SW SIG UNDERHOOD FUSE BLOCK UP/DOWN SW SIG VIO WIRE VIO/GRY WIRE VOLT REF WHT WIRE WHT/BLU WIRE WHT/GRY WIRE WINDSHIELD FRONT VIEW CAMERA

BATTERY POSITIVE VOLTAGE BLK WIRE BLK/WHT WIRE BLU WIRE BLU/GRN WIRE BRAKE SYSTEM CONTROL MODULE COMPUTER COMPUTER DATA LINES SYSTEM DATA LINES DRIVER INFORMATION CENTER DISPLAY GRN/VIO WIRE GRN/YEL WIRE GROUND GRY WIRE GRY/BLK WIRE HI SPD GMLAN SER DATA (-) 9 HI SPD GMLAN SERIAL DATA (-) (1) HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED IGN 1 VOLT INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK LEFT PARK BRAKE ACTUATOR LOCAL INTERCONNECT NETWORK BUS 31 LOGIC LR PARK BRAKE MOTOR APPLY CTRL LR PARK BRAKE MOTOR LOW REF PARK BRAKE SWITCH PARKING BRAKE IND. RED/VIO WIRE RED/YEL WIRE RIGHT PARK BRAKE ACTUATOR RR PARK BRAKE MOTOR APPLY CTRL RR PARK BRAKE MOTOR LOW REF SERVICE PARK BRAKE IND SIG GND SYSTEM UNDERHOOD FUSE BLOCK VIO WIRE VIO/GRY WIRE WHT WIRE WHT/GRN WIRE

BATT POS VOLT BLK WIRE BLK/BLU WIRE BLK/GRY WIRE BLU WIRE BLU/YEL WIRE BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM FT PRK AID DIS CONTROL FT PRK LH CORNER SENS FT PRK LH MID SENS FT PRK RH CORNER SENS FT PRK RH MID SENS GMLAN SERIAL DATA 2 GRN WIRE GRN/BRN WIRE GRN/YEL WIRE GRY WIRE GRY/GRN WIRE HOT AT ALL TIMES INSTRUMENT PANEL FUSE BLOCK LED DISABLE SIG LEFT FRONT SIDE PARKING ASSIST SENSOR LEFT MIDDLE FRONT PARKING ASSIST SENSOR LEFT OUTER FRONT PARKING ASSIST SENSOR LF SUPPLEMENTAL OBJ SENS SIG LOW SPEED GMLAN SERIAL DATA LR CON OBJ SENS SIG LR MIDDLE OBJ SENS SIG LR SUPPLEMENTAL OBJECT SENS SIG OBJECT SENS CTRL OBJECT SENS LOW REF PARKING ASSIST CONTROL MODULE POWER SUPPLY TRANSFORMER RED/GRN WIRE RED/GRY WIRE RED/YEL WIRE RF SUPPLEMENTAL OBJ SENS SIG RIGHT FRONT SIDE PARKING ASSIST SENSOR RIGHT MIDDLE FRONT PARKING ASSIST SENSOR RIGHT OUTER FRONT PARKING ASSIST SENSOR RR CORNER OBJ SENS SIG RR MIDDLE OBJ SENS SIG RR SUPPLEMENTAL OBJECT SENS SIG SENS LOW REF SERIAL DATA COMMUNICATION ENABLE SUPPLY VOLTAGE 1 UNDERHOOD FUSE BLOCK VIO/GRY WIRE VIO/WHT WIRE W/O INTEGRATED BRAKE ASSIST WHT WIRE WHT/BLU WIRE WHT/GRY WIRE YEL WIRE YEL/BLU WIRE YEL/GRY WIRE YEL/VIO WIRE YEL/WHT WIRE

AUTOMATIC TRANSMISSION ASSEMBLY BATTERY BATTERY FUSE BLOCK BLK WIRE BLK/WHT WIRE BLU WIRE CHARGING CIRCUIT COMPUTER DATA LINES SYSTEM DRIVE MODE SELECT SWITCH ETRS OUT OF PARK SWITCH 2 SIGNAL ETRS OUT OF PARK SWITCH SIGNAL GENERATOR GRN WIRE HIGH SPEED GMLAN SERIAL DATA (-) (1) HOT W/ IGNITION MAIN RELAY ENERGIZED NCA WIRE RED/YEL WIRE STARTER MOTOR STARTER PINION SOLENOID ACTUATOR RELAY STARTER RELAY TRANSMISSION CONTROL MODULE TRANSMISSION PARK VALVE POSITION SWITCH TRANSMISSION POSI TRANSMISSION/INPUT INTERMEDIATE SHAFT SPEED SENSOR UNDERHOOD AUXILIARY FUSE BLOCK UNDERHOOD FUSE BLOCK VIO/GRN WIRE VIO/WHT WIRE WHT WIRE WHT/YEL WIRE YEL WIRE YEL/BLK WIRE YEL/GRN WIRE

BATTERY POSITIVE VOLT BLK WIRE BLU WIRE BLU/VIO WIRE BODY CONTROL MODULE COMPUTER DATA LINES SYSTEM DRIVER DOOR LATCH ASSEMBLY DRV DR OPEN SW SIG GRN WIRE GRN/VIO WIRE HIGH SPEED GMLAN SERIAL DATA + (1) HIGH SPEED GMLAN SERIAL DATA - (1) HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED INSTRUMENT PANEL FUSE BLOCK KEYLESS ENTRY CONTROL MODULE LO SPD GMLAN SERIAL DATA OFF/ACCESSORY IGN VOLT RED/VIO WIRE STEERING COLUMN LOCK MODULE STEERING COLUMN LOCK SIG STEERING COLUMN LOCK STATUS SIG UNDERHOOD FUSE BLOCK WHT WIRE WHT/YEL WIRE