Cadillac CT6 I facelift (2018-2023) left underhood fuse block Wiring diagrams

4.2L TURBO AIR QUALITY SENS SIG AUX TEMP CONT AUXILIARY AIR TEMP SENS SIG BATT POS VOLT BLK WIRE BLK/YEL WIRE BLOWER MOTOR SPEED CTRL BLU WIRE BLU/BRN WIRE BLU/GRY WIRE BLU/YEL WIRE BRN WIRE BRN/BLK WIRE BRN/VIO WIRE BRN/YEL WIRE CENTER DUCT CONSOLE AUXILIARY AIR TEMPERATURE SENSOR COMPUTER DATA LINES SYSTEM DEFOGGER SYSTEM ELEC VARIABLE DISPLACEMENT CTRL ELEC VARIABLE DISPLACEMENT SPLY GRN WIRE GRN/BLK WIRE GRN/BLU WIRE GRN/YEL WIRE GROUND GRY WIRE HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED HVAC CONTROL MODULE (LOWER RIGHT END OF DASH) INSIDE AIR TEMP SENS SIG INSTRUMENT PANEL FUSE BLOCK LEFT DUCT LOWER AUXILIARY AIR TEMPERATURE SENSOR LEFT DUCT UPPER AUXILIARY AIR TEMPERATURE SENSOR LEFT UNDERHOOD FUSE BLOCK LOW SPEED GMLAN SERIAL DATA LOWER DUCT AIR TEMP SENS SIG REAR BLOWER MOTOR SPEED CTRL REAR DEFOG RLY CTRL RED/BLU WIRE RED/VIO WIRE RIGHT DUCT LOWER AUXILIARY AIR TEMPERATURE SENSOR RIGHT DUCT UPPER AUXILIARY AIR TEMPERATURE SENSOR RUN/CRANK IGNITION 1 VOLTAGE SENS LOW REF SERIAL DATA BUS 19 SERIAL DATA BUS 9 SOLAR SENS DRIVER SIG SOLAR SENS LOW REF UNDERHOOD FUSE BLOCK VIO/GRY WIRE VIO/WHT WIRE YEL WIRE

4.2L TWIN TURBO BLU WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/YEL WIRE BRN WIRE BRN/BLK WIRE BRN/BLU WIRE BRN/WHT WIRE DATA COMM ENABLE ETHERNET BUS 3 (+) ETHERNET BUS 4 (-) ETHERNET BUS 6 (-) ETHERNET BUS 7 (-) EXCEPT 4.2L TWIN TURBO GRN WIRE GRN/BLK WIRE GRN/WHT WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/GRN WIRE GRY/WHT WIRE HEAD-UP DISPLAY HI SPD GMLAN SERIAL DATA (+) 8 HI SPD GMLAN SERIAL DATA (+) 9 HI SPD GMLAN SERIAL DATA (-) (1) HI SPD GMLAN SERIAL DATA (-) (2) HOT W/ IGNITION MAIN RELAY ENERGIZED LEFT UNDERHOOD FUSE BLOCK LO SPD GMLAN SERIAL DATA 2 LO SPD SER DATA 2 RADIO RUN/CRANK IGNITION 1 VOLTAGE SER DATA COMM ENABLE SERIAL DATA GATEWAY MODULE UNDERHOOD FUSE BLOCK VIO/WHT WIRE WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/GRY WIRE

4.2L TWIN TURBO BLU WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/VIO WIRE BLU/YEL WIRE BRN WIRE BRN/BLK WIRE BRN/BLU WIRE BRN/WHT WIRE CLUSTER DATA COMM ENABLE ETHERNET BUS 3 (+) ETHERNET BUS 4 (-) ETHERNET BUS 6 (-) ETHERNET BUS 7 (-) EXCEPT 4.2L TWIN TURBO GRN WIRE GRN/BLK WIRE GRN/WHT WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/GRN WIRE GRY/WHT WIRE HEAD-UP DISPLAY HI SPD GMLAN SERIAL DATA (+) 4 HI SPD GMLAN SERIAL DATA (+) 8 HI SPD GMLAN SERIAL DATA (+) 9 HI SPD GMLAN SERIAL DATA (-) (1) HOT W/ IGNITION MAIN RELAY ENERGIZED INSTRUMENT INTERFACE CTRL MODULE LIN BUS 1 LEFT UNDERHOOD FUSE BLOCK LIN BUS 1 LO SPD GMLAN SERIAL DATA 2 LO SPD SER DATA 2 POWER DISTRIBUTION SYSTEM RADIO RUN/CRANK IGNITION 1 VOLTAGE SER DATA COMM ENABLE SERIAL DATA GATEWAY MODULE UNDERHOOD FUSE BLOCK VIO/WHT WIRE WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/GRY WIRE

AJAR SW SIG AMBIENT LIGHT/ SUNLOAD SENSOR BLK WIRE BLU WIRE BLU/VIO WIRE BRN WIRE BRN/GRN WIRE BRN/WHT WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM GRN WIRE GRN/GRY WIRE GRY WIRE GRY/WHT WIRE GRY/YEL WIRE HOT W/ IGNITION MAIN RELAY ENERGIZED HVAC CONTROL MODULE LEFT REAR DOOR LATCH ASSEMBLY LEFT REAR WINDOW MOTOR LEFT UNDERHOOD FUSE BLOCK LOGIC LOGIC PASSENGER WINDOW MOTOR LOW REF NETWORK BUS 3 NETWORK BUS 4 PASSENGER DOOR LATCH ASSEMBLY RED/BLU WIRE RED/WHT WIRE RIGHT REAR DOOR LATCH ASSEMBLY RIGHT REAR WINDOW MOTOR LOGIC VIO/BLK WIRE VIO/WHT WIRE VIO/YEL WIRE WHT WIRE YEL WIRE YEL/BLU WIRE YEL/GRN WIRE

3.6L 4.2L TURBO BATT POS VOLT BLK WIRE BLK/GRN WIRE BLK/GRY WIRE BLK/RED WIRE BLK/VIO WIRE BLK/YEL WIRE BLU WIRE BLU/BRN WIRE BRN WIRE BRN/BLK WIRE BRN/BLU WIRE BRN/VIO WIRE COMPUTER DATA LINES SYSTEM DRIVER BACK SEAT HEATING ELEMENT DRIVER CUSHION SEAT HEATING ELEMENT DRIVER HIGH HEAT IND DRIVER LOW HEAT IND DRIVER MEDIUM HEAT IND DRIVER SEAT BACK SWITCH DRIVER SEAT CUSHION SWITCH DRV HTD BACK ELEMENT CTRL DRV HTD BACK NTC SIG DRV HTD SEAT ELEMENT CTRL DRV HTD SEAT ELEMENT LO REF DRV HTD SEAT NTC LO REF DRV HTD SEAT NTC SIG DRV SEAT VENT MTR CTRL FRONT SEAT HEATING CONTROL MODULE (UNDER DRIVER'S SEAT) GRN/BLU WIRE GRN/YEL WIRE GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED HVAC CONTROLS INSTRUMENT PANEL FUSE BLOCK LEFT UNDERHOOD FUSE BLOCK LOGIC PASS HTD BACK ELEMENT CTRL PASS HTD BACK NTC SIG PASS HTD SEAT ELEMENT CTRL PASS HTD SEAT ELEMENT LO REF PASS HTD SEAT NTC LO REF PASS HTD SEAT NTC SIG PASS SEAT VENT MTR CTRL PASSENGER BACK SEAT HEATING ELEMENT PASSENGER CUSHION SEAT HEATING ELEMENT PASSENGER HIGH HEAT IND PASSENGER LOW HEAT IND PASSENGER MEDIUM HEAT IND PASSENGER SEAT BACK SWITCH PASSENGER SEAT CUSHION SWITCH RED WIRE RED/BLU WIRE RED/GRY WIRE RUN/CRANK IGN 1 VOLT SERIAL DATA BUS 2 UNDERHOOD FUSE BLOCK VIO/WHT WIRE WHT WIRE WHT/BLU WIRE WHT/BRN WIRE WHT/GRY WIRE YEL/GRY WIRE

3.6L 4.2L TURBO BLK WIRE BLU WIRE BRN WIRE COMPUTER DATA LINES SYSTEM GRN/BLU WIRE HEATED STEERING WHEEL IND HEATED STEERING WHEEL SWITCH HOT W/ IGNITION MAIN RELAY ENERGIZED LED CONTROL LED DIMMING SIG LEFT LOWER STEERING WHEEL CONTROLS SWITCH LEFT UNDERHOOD FUSE BLOCK LIN SERIAL DATA BUS 19 LOGIC NCA WIRE ORG/ WIRE PNK WIRE RED WIRE RIGHT UPPER STEERING WHEEL CONTROLS SWITCH RUN/CRANK IGN 1 VOLT STEERING WHEEL AIR BAG COIL STEERING WHEEL HEATER STEERING WHEEL HEATER FUSE HOLDER STEERING WHEEL HEATING CONTROL MODULE STEERING WHEEL HIGH CTRL STEERING WHEEL VOLT REF SW SIG UNDERHOOD FUSE BLOCK VIO/GRY WIRE VIO/WHT WIRE WHT WIRE

"CHECK ENGINE" IND CTRL 3.6L 4.2L TURBO ABS IND. ADAPTIVE FRONT LIGHTING (AFL) LIGHT IWD AFL LIGHT IND AIR BAG IND AUTO STOP IND BATT POS VOLT BLK WIRE BRAKE WARNING IND BRN/WHT WIRE CHARGE IND CHARGING GAUGE COLLISION ALERT LED CTRL COMPUTER DATA LINES SYSTEM CRUISE IND (W/ MULTI COLOR GRAPHIC) DISPLAY (W/ MULTI COLOR GRAPHIC) DOOR AJAR IND DRIVER INFORMATION CENTER DISPLAY ENGINE CONTROLS SYSTEM ENGINE COOLANT TEMP IND ENGINE COOLANT TEMPERATURE GAUGE ENGINE OIL LEVEL GAUGE ENGINE OIL PRESSURE IND ESC IND ESC OFF IND FUEL GAUGE FUEL IND GRN/BLK WIRE GRY WIRE GRY/GRN WIRE GRY/VIO WIRE HEAD-UP DISPLAY CIRCUIT HEAD-UP DISPLAY SIG HIGH BEAM ASSIST IND HIGH BEAM LAMP IND HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK KM/H MPH GAUGE KM/H MPH IND LANE DEPARTURE WARNING IND LANE KEEP ASSIST IND LED DISPLAY DIM CTRL LEFT TURN IND LEFT UNDERHOOD FUSE BLOCK LOGIC LOW WASHER FLUID IND CTRL LVDS MALFUNCTION IND MOST SERIAL DATA (+) NAVIGATION SYSTEM NIGHT VISION NIGHT VISION CIRCUIT OFF IND PARK IND PARK LAMP IND POWER DISTRIBUTION SYSTEM RED/BLU WIRE RIGHT TURN IND RPM IND RUN/CRANK IGN 1 VOLT SEAT BELT IND SECURITY IND SERIAL DATA BUS 12 SERVICE PARK BRAKE IND SPEEDOMETER START/STOP SYSTEM FUNCTION IND (W/ MULTI COLOR GRAPHIC) TIRE PRESSURE IND TRACTION CONTROL OFF IND UNDERHOOD FUSE BLOCK VEHICLE AHEAD IND VIO WIRE VIO/WHT WIRE WHT WIRE WHT/GRN WIRE WHT/VIO WIRE WIPER/WASHER SYSTEM

3.6L 4.2L TURBO BATT POSITIVE VOLT BLK WIRE BLU WIRE BODY CONTROL MODULE (LOWER LEFT END OF DASH) BRN/GRN WIRE COMPUTER DATA LINES SYSTEM DRIVER INFORMATION CENTER DISPLAY ENGINE CONTROL MODULE GMLAN SERIAL DATA - 1 GRN/GRY WIRE GRN/WHT WIRE GRY/BLK WIRE GRY/VIO WIRE HI SPD GMLAN SERIAL DATA (-) (1) HOOD OPEN SW SIG HOOD STATUS B SIG HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED IMMOBILIZER CONTROL MODULE (UNDER FLOOR CONSOLE) IMMOBILIZER LOW REF IMMOBILIZER SPLY CTRL INSTRUMENT CLUSTER LEFT UNDERHOOD FUSE BLOCK LOCAL INTERCONNECT NETWORK SERIAL BUS 11 LOGIC MOST SERIAL DATA (+) NETWORK SERIAL BUS 11 PPL REAR BODY FUSE BLOCK RED/WHT WIRE RUN/CRANK IGN 1 VOLT SECURITY IND UNDERHOOD FUSE BLOCK VEHICLE ANTI-THEFT SYS IMMOBILIZER CTRL VEHICLE ANTI-THEFT SYS IMMOBILIZER LOW REF VIO/GRY WIRE VIO/WHT WIRE WHT WIRE WHT/GRN WIRE YEL WIRE

3.6L 4.2L TURBO BATT POS VOLT BLK WIRE BLK/RED WIRE BLU WIRE BLU/BRN WIRE BLU/VIO WIRE BLU/WHT WIRE BRN/BLK WIRE COMPUTER DATA LINES SYSTEM GRN WIRE GRN/BLK WIRE GRN/BLU WIRE GRN/BRN WIRE GRN/YEL WIRE GRY WIRE HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED LEFT REAR BACK SEAT HEATING ELEMENT LEFT REAR CUSHION SEAT HEATING ELEMENT LEFT UNDERHOOD FUSE BLOCK LIN SERIAL DATA BUS 2 LR CUSHION ELEMENT CTRL LR CUSHION ELEMENT LO REF LR CUSHION NTC LO REF LR CUSHION NTC SIG LR FAN SPD CTRL LR HTD SEAT ELEMENT CTRL LR SEAT BACK NTC SIG REAR BODY FUSE BLOCK REAR SEAT HEATING CONTROL MODULE (UNDER CENTER OF REAR SEATS) RED WIRE RED/WHT WIRE RR CUSHION ELEMENT CTRL RR CUSHION ELEMENT LO REF RR CUSHION NTC SIG RR FAN SPD CTRL RR HTD SEAT ELEMENT CTRL RR NTC LO REF RR SEAT BACK NTC SIG RUN/CRANK IGN 1 VOLT UNDERHOOD FUSE BLOCK VIO/WHT WIRE W/ LUXURY W/O LUXURY WHT/BLK WIRE WHT/BLU WIRE YEL WIRE YEL/WHT WIRE

3.6L 4.2L TURBO BATT POSITIVE VOLT BLK WIRE BLU WIRE BLU/VIO WIRE BODY CONTROL MODULE (LOWER LEFT END OF DASH) COMPUTER DATA LINES SYSTEM DOOR OPEN SW SIG DRIVER DOOR LATCH ASSEMBLY GND LO SPD GMLAN SERIAL DATA GRN WIRE GRN/VIO WIRE HI SPD GMLAN SERIAL DATA (-) (1) HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED INSTRUMENT PANEL FUSE BLOCK KEYLESS ENTRY CONTROL MODULE LEFT UNDERHOOD FUSE BLOCK LO SPD GMLAN SERIAL DATA LOGIC OFF/ACCESSORY VOLT RED/GRY WIRE STEERING COLUMN LOCK MODULE (IN PASSENGER COMPT, ON STEERING COLUMN) STRG COL LOCK SIG STRG COL LOCK STATUS SIG STRG LOCK SIG UNDERHOOD FUSE BLOCK WHT WIRE