Cadillac CT6 I facelift (2018-2023) power supply transformer Wiring diagrams

3.6L 4.2L TURBO ACCELERATOR PEDAL POSITION SENSOR (TOP OF ACCELERATOR PEDAL ASSEMBLY) BATT POS VOLT BATTERY FUSE BLOCK BLK WIRE BLK/BLU WIRE BLK/BRN WIRE BLK/VIO WIRE BLK/YEL WIRE BLU WIRE BLU/YEL WIRE BODY CONTROL MODULE (LOWER LEFT END OF DASH) BRAKE APPLY SENS CTRL BRAKE PEDAL POSITION SENSOR BRK APLY SENS SIG BRN/BLK WIRE BRN/GRN WIRE BRN/RED WIRE CANCEL SWITCH COMPUTER DATA LINES SYSTEM CRUISE IND CRUISE SWITCH CRUISE/ETC/TCC BRK SIG DRIVER INFORMATION CENTER DISPLAY FORWARD COLLISION SWITCH GAP UP/DOWN SW SIG GRN/WHT WIRE GRY/GRN WIRE HI SPD GMLAN SERIAL DATA (-) (1) HOT AT ALL TIMES INSTRUMENT CLUSTER LANE KEEP ASSIST SWITCH LEFT LOWER STEERING WHEEL CONTROLS SWITCH LEFT UPPER STEERING WHEEL CONTROLS SWITCH LOGIC LOW REF LOW SPD GMLAN SERIAL DATA 2 POWER SUPPLY TRANSFORMER REAR BODY FUSE BLOCK RED WIRE RED/GRY WIRE RED/VIO WIRE RES+ SET- SET/COAST/RESUME/ ACCELERATE SW SIG STEERING WHEEL AIR BAG COIL SUPER CRUISE VIO WIRE WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/RED WIRE YEL/WHT WIRE

BATT POS VOLT BATTERY FUSE BLOCK BLK WIRE BLK/BRN WIRE BLU WIRE BLU/BRN WIRE BLU/VIO WIRE BLU/WHT WIRE BLU/YEL WIRE BODY CONTROL MODULE (LOWER LEFT END OF DASH) BRAKE APPLY SENS CTRL BRAKE APPLY SENS LOW REF BRAKE APPLY SENS SIG COMPUTER DATA LINES SYSTEM FRONT TURN LAMP FEEDBACK SIG GRN WIRE GRN/VIO WIRE GRN/WHT WIRE GRN/YEL WIRE GROUND GRY/BLU WIRE GRY/BRN WIRE GRY/GRN WIRE GRY/VIO WIRE GRY/YEL WIRE HAZARD SWITCH SIG HDLP RELAY COIL CTRL HDLP SWITCH PARK LAMP SIG HI SPD GMLAN SERIAL DATA (-) (1) HOT AT ALL TIMES INSTRUMENT PANEL FUSE BLOCK LEFT CORNERING LAMP RELAY CTRL LEFT PARK LAMP CTRL LF DRL CTRL LF TURN SIG LAMP CTRL LF TURN SIG SWITCH SIG LH HEADLAMP RLY CTRL LR STOP LAMP CTRL LR TURN SIG LAMP CTRL POWER DISTRIBUTION SYSTEM POWER SUPPLY TRANSFORMER PUDDLE LAMP CTRL REAR BODY FUSE BLOCK REAR LICENSE LAMP CTRL REAR TURN LAMP FEEDBACK SIG RED/BLU WIRE RED/BRN WIRE RED/GRN WIRE RED/GRY WIRE RED/VIO WIRE RED/WHT WIRE RF DRL CTRL RF TURN LAMP FEEDBACK SIG RF TURN SIG LAMP CTRL RF TURN SIG SWITCH SIG RIGHT CORNERING LAMP RELAY CTRL RIGHT PARK LAMP CTRL RR STOP LAMP CTRL RR TURN LAMP FEEDBACK SIG RR TURN SIG LAMP CTRL SPLY VOLT STOP LAMP RELAY COIL CTRL VIO/BLK WIRE VIO/GRY WIRE VIO/WHT WIRE WHT WIRE WHT/BLK WIRE WHT/GRY WIRE WHT/VIO WIRE WHT/YEL WIRE YEL/BRN WIRE

BATTERY FUSE BLOCK BATTERY POSITIVE VOLT BLK WIRE BLU WIRE BLU/BRN WIRE BLU/VIO WIRE BLU/WHT WIRE BODY CONTROL MODULE (LOWER LEFT END OF DASH) BRN WIRE BRN/YEL WIRE BUS 3 COMPUTER DATA LINES SYSTEM DOOR DEAD LOCK RELAY DOOR LOCKS SYSTEM DR LOCK ACTUATOR UNLOCK CTRL DR LOCK CTRL DRIVER DOOR LATCH ASSEMBLY DRIVER WINDOW SWITCH FUEL DOOR LOCK ACTUATOR FUEL DOOR LOCK RELAY FUEL DR LOCK RELAY CTRL GRN/YEL WIRE GRY WIRE HOT AT ALL TIMES INSTRUMENT PANEL FUSE BLOCK POWER DISTRIBUTION SYSTEM POWER SUPPLY TRANSFORMER REAR BODY FUSE BLOCK RED/BRN WIRE RED/GRY WIRE RED/VIO WIRE RED/WHT WIRE SECURITY LOCK RELAY CTRL SERIAL DATA BUS 3 UNLOCK SIG

ACTIVE SAFETY CONTROL MODULE 1 ACTIVE SAFETY CONTROL MODULE 2 BATTERY SENSOR MODULE BLK WIRE BODY CONTROL MODULE EXTERIOR REAR COMPARTMENT LID UNLATCH SWITCH HANDS-FREE LIFTGATE SENSOR CONTROL MODULE HANDS-FREE LIFTGATE SENSOR LAMP LEFT BACKUP LAMP LEFT INNER TAIL- LAMP LEFT LICENSE PLATE LAMP LEFT REAR SHORT RANGE RADAR SENSOR MODULE LEFT SIDE OBJECT SENSOR MODULE LEFT TAIL LAMP ASSEMBLY LEFT UPPER AUXILIARY AIR TEMPERATURE DOOR ACTUATOR LIFTGATE CONTROL MODULE LOGIC MEMORY CARD RECEPTACLE MULTI-FUNCTION ENERGY STORAGE CAPACITOR CONTROL MODULE POWER SUPPLY TRANSFORMER REAR BODY FUSE BLOCK REAR COMPARTMENT LID UNLATCH RELAY REAR FOG LAMP REAR MIDDLE SHORT RANGE RADAR SENSOR MODULE REAR SHORT RANGE RADAR SENSOR MODULE RIGHT BACKUP LAMP RIGHT EXHAUST FLOW CONTROL VALVE RIGHT INNER TAIL- LAMP RIGHT LICENSE PLATE LAMP RIGHT REAR BRAKE PAD WEAR SENSOR RIGHT SIDE OBJECT SENSOR MODULE RIGHT UPPER AUXILIARY AIR TEMPERATURE DOOR ACTUATOR VIDEO PROCESSING CONTROL MODULE W/ FOG LAMP W/ OBSTACLE DETECTION SIDE ACTIVE SAFETY, COLLISION AVOIDANCE, MITIGATION W/ QUAD ZONE W/ STOP/ START SYSTEM W/O FOG LAMP W/O OBSTACLE DETECTION SIDE ACTIVE SAFETY, COLLISION AVOIDANCE, MITIGATION WINDSHIELD FRONT VIEW CAMERA

4.2L BATTERY FUSE BLOCK BLK WIRE COMPUTER DATA LINES SYSTEM DRIVER WINDOW SWITCH GRN/BLK WIRE GRN/WHT WIRE GRN/YEL WIRE HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED INSTRUMENT PANEL FUSE BLOCK INSTRUMENT PANEL MULTI-FUNCTION SWITCH 1 INSTRUMENT PANEL MULTI-FUNCTION SWITCH 2 LEFT LOWER STEERING WHEEL CONTROLS SWITCH LEFT REAR SEAT HEATING/VENTING/ COOLING SWITCH LEFT UNDERHOOD FUSE BLOCK LEFT UPPER STEERING WHEEL CONTROLS SWITCH LOGIC PASSENGER AIR BAG DISABLED INDICATOR POWER DISTRIBUTION SYSTEM POWER SUPPLY TRANSFORMER RED/BLU WIRE RED/GRY WIRE RED/WHT WIRE RIGHT LOWER STEERING WHEEL CONTROLS SWITCH RIGHT REAR SEAT HEATING/VENTING/ COOLING SWITCH RIGHT UPPER STEERING WHEEL CONTROLS SWITCH SUPLY VOLT UNDERHOOD FUSE BLOCK VIO/GRY WIRE WHT WIRE YEL/BLK WIRE

4.2L TWIN TURBO ACTIVE SAFETY CONTROL MODULE ALERT LED CTRL ALERT LED CTRL LO SPD GMLAN SERIAL DATA B+ VOLT BATT POS VOLT BATTERY FUSE BLOCK BLK WIRE BLU WIRE BLU/GRY WIRE BLU/VIO WIRE BODY CONTROL MODULE COLLISION ALERT INDICATORS COMPUTER DATA LINES SYSTEM DIMMING CTRL DRIVER INFORMATION CENTER DISPLAY EXCEPT 4.2L TWIN TURBO FORWARD COLLISION SWITCH FRONT OBJECT SENS CTRL 2 COMM ENABLE GRN WIRE GRY WIRE GRY/GRN WIRE GRY/VIO WIRE HI SPD GMLAN SERIAL DATA (-) (1) HOT AT ALL TIMES HOT W/ BATTERY SAVER RELAY 2 ENERGIZED HOT W/ IGNITION MAIN RELAY ENERGIZED IGN 1 VOLT INSTRUMENT PANEL FUSE BLOCK LANE DEPARTURE WARNING IND LANE DEPARTURE WARNING IND CTRL LANE KEEP ASSIST IND LANE KEEP ASSIST SWITCH LEFT LOWER STEERING WHEEL CONTROLS SWITCH LEFT UNDERHOOD FUSE BLOCK LEFT UPPER STEERING WHEEL CONTROLS SWITCH LO SPD GMLAN SERIAL DATA LOGIC LOGIC INSTRUMENT CLUSTER POWER DISTRIBUTION SYSTEM POWER SUPPLY TRANSFORMER REAR BODY FUSE BLOCK RED WIRE RED/BLU WIRE RED/GRN WIRE RED/WHT WIRE REFLECTED LED DISPLAY DIMMING CTRL RES+ RIGHT UPPER STEERING WHEEL CONTROLS SWITCH SERIAL DATA (-) (1) SERIAL DATA (-) 1 SERIAL DATA (-) 4 SET- STEERING WHEEL AIR BAG COIL UNDERHOOD FUSE BLOCK UP/DOWN SW SIG VEHICLE AHEAD IND VIO WIRE VIO/GRY WIRE VIO/WHT WIRE W/ BRAKE PREFILL INTEGRATED BRAKE ASSIST W/O BRAKE PREFILL INTEGRATED BRAKE ASSIST W/O HEADUP DISPLAY WHT WIRE WHT/GRY WIRE WHT/RED WIRE WINDSHIELD FRONT VIEW CAMERA

BATT POS VOLT BATTERY FUSE BLOCK BLK WIRE BLK/BLU WIRE BLK/GRY WIRE BLU WIRE BLU/BRN WIRE BLU/YEL WIRE BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DISABLE SIG DISABLE SW SIG DRIVER INFORMATION CENTER DISPLAY FRONT PARKING AID DISPLAY CTRL GMLAN SERIAL DATA GRN WIRE GRN/BRN WIRE GRY WIRE GRY/GRN WIRE HOT AT ALL TIMES INSTRUMENT CLUSTER LEFT CORNER SENS LEFT FRONT SIDE PARKING ASSIST SENSOR LEFT MID SENS LEFT MIDDLE FRONT PARKING ASSIST SENSOR LEFT OUTER FRONT PARKING ASSIST SENSOR LF OBJECT SENS SIG LOGIC LR CORNER SEN SIG LR MIDDLE SENS SIG LR OBJECT SENS SIG OBJECT SENS CTRL OBJECT SENS LOW REF PARKING ASSIST CONTROL MODULE POWER DISTRIBUTION SYSTEM POWER SUPPLY TRANSFORMER REAR BODY FUSE BLOCK REAR PARK ASSIST DISABLE SIG RED/GRN WIRE RED/GRY WIRE RED/WHT WIRE RF OBJECT SENS SIG RIGHT CORNER SENS RIGHT FRONT SIDE PARKING ASSIST SENSOR RIGHT MID SENS RIGHT MIDDLE FRONT PARKING ASSIST SENSOR RIGHT OUTER FRONT PARKING ASSIST SENSOR RR CORNER SEN SIG RR MIDDLE SENS SIG RR OBJECT SENS SIG SENS LOW REF SERIAL DATA 2 SERIAL DATA COMM ENABLE VIO/GRY WIRE VIO/WHT WIRE WHT WIRE WHT/BLU WIRE WHT/GRY WIRE YEL WIRE YEL/BLU WIRE YEL/GRY WIRE YEL/VIO WIRE YEL/WHT WIRE

3.6L 4.2L TURBO ACTUATOR ACTUATOR CTRL ACTUATOR LO REF BATT POS VOLT BATTERY FUSE BLOCK BLK WIRE BLU WIRE BLU/VIO WIRE BRN WIRE BRN/GRN WIRE BRN/VIO WIRE BRN/WHT WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM DOOR AJAR IND DRIVER INFORMATION CENTER DISPLAY ENGINE CONTROL MODULE ENGINE HOOD SWITCH ETHERNET BUS 7 (-) GMLAN SER DATA GMLAN SERIAL DATA - 1 GRN WIRE GRN/VIO WIRE GRY WIRE GRY/GRN WIRE GRY/WHT WIRE HOOD OPEN SW SIG HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED INSTRUMENT CLUSTER LCK STATUS SIG LO SPD GMLAN SERIAL DATA 2 LOCK SIG LOGIC LOGIC GND OFF/ACC IGN VOLT OVERHEAD CONSOLE MULTI- FUNCTION SWITCH PASSENGER DOOR LOCK SWITCH POWER SUPPLY TRANSFORMER PPL RECEIVER SIG RED/BLU WIRE RED/GRY WIRE RED/WHT WIRE REMOTE CONTROL DOOR LOCK RECEIVER RUN/CRANK IGN 1 VOLT STEERING COLUMN LOCK MODULE (IF EQUIPPED) SUPLY VOLT TRANSMIT SIG UNDERHOOD FUSE BLOCK VIO WIRE VIO/BLK WIRE VIO/GRY WIRE VIO/WHT WIRE VIO/YEL WIRE WHT WIRE WHT/GRN WIRE YEL WIRE YEL/BLU WIRE YEL/GRN WIRE YEL/VIO WIRE

1-BK AUXILIARY BATT POS VOLT BATT POS VOLT ENTERTAINMENT REMOTE ENABLE SIG BATTERY FUSE BLOCK BK DISPLAY SIG BK LVDS BK LVDS DISPLAY SIG BK LVDS REMOTE DISPLAY SIG BK USB USB SERIAL DATA BLK/WHT WIRE BLU/VIO WIRE BN LVDS AUXILIARY VIDEO SIG BRN WIRE BRN/GRY WIRE BRN/WHT WIRE BRN/YEL WIRE BU LVDS VIDEO SIG COMPUTER DATA LINES SYSTEM DRIVER SEATBACK VIDEO DISPLAY ENTERTAINMENT REMOTE ENABLE SIG ETHERNET BUS 3 (+) GRN/WHT WIRE GRY/GRN WIRE GY USB SERIAL DATA HEADPHONE LOW REF HOT AT ALL TIMES HOT W/ BATTERY SAVER RELAY 2 ENERGIZED LF HEADPHONE SIG LOGIC AUDIO/VIDEO INPUT ADAPTER LOW SPEED GMLAN SERIAL DATA 2 LVDS LVDS 2-BK MEDIA DISC PLAYER NCA WIRE PASSENGER SEATBACK VIDEO DISPLAY POWER SUPPLY TRANSFORMER REAR BODY FUSE BLOCK REAR SEAT AUDIO HEADPHONE COM SIG REAR SEAT AUDIO HEADPHONE LOW REF RED/BRN WIRE RED/GRY WIRE REMOTE 4 ENABLE SIG LF HEADPHONE SIG RF HEADPHONE SIG SIG GND SIGNAL GROUND USB W/ LUXURY SEAT W/O LUXURY SEAT

3.6L 4.2L TURBO BATT POS VOLT BATT POS VOLT LIN SERIAL DATA BUS 1 BATTERY FUSE BLOCK BLK WIRE BLK/GRY WIRE BLU WIRE BODY CONTROL MODULE (LOWER LEFT END OF DASH) BRN/BLU WIRE BRN/GRN WIRE BRN/GRY WIRE CAMERA WASH SIG CAMERA WASH SWITCH COMPUTER DATA LINES SYSTEM DELAY SWITCH DRIVER INFORMATION CENTER DISPLAY FRONT WINDSHIELD WIPER SW HI SIG HDLP WASHER RLY CTRL GND (RAIN SENSOR) GND HI SPD GMLAN SERIAL DATA (+) 1 GRN/BRN WIRE GRY WIRE GRY/GRN WIRE GRY/VIO WIRE HI SPD GMLAN SERIAL DATA (-) (1) HOT AT ALL TIMES HOT W/ BATTERY SAVER RELAY 2 ENERGIZED INSTRUMENT CLUSTER INT LOW OFF INT LOW OFF HIGH LEFT UNDERHOOD FUSE BLOCK LOGIC LOW SPD GMLAN SERIAL DATA LOW WASHER FLUID IND CTRL MIST MIST HIGH MULTI-FUNCTION ENERGY STORAGE CAPACITOR CONTROL MODULE N/A NIGHT VISION CAMERA WASHER PUMP NIGHT VISION CAMERA WASHER PUMP RELAY POWER SUPPLY TRANSFORMER REAR BODY FUSE BLOCK RED WIRE RED/BLU WIRE RED/BRN WIRE RED/GRY WIRE RED/VIO WIRE SPLY VOLT UNDERHOOD FUSE BLOCK VIO WIRE WASHER SWITCH WHT WIRE WHT/BLK WIRE WHT/VIO WIRE WINDOW SHELF) (UNDER REAR WINDSHIELD WASHER FLUID LEVEL SWITCH WINDSHIELD WASHER PUMP WINDSHIELD WASHER PUMP RELAY WINDSHIELD WASHER RLY CTRL WINDSHIELD WASHER SW SIG WINDSHIELD WIPER MOTOR WINDSHIELD WIPER MTR PRK SW SIG WINDSHIELD WIPER MTR RLY COIL CTRL WINDSHIELD WIPER RELAY WINDSHIELD WIPER SPEED CONTROL RELAY WINDSHIELD WIPER SW HI SIG WINDSHIELD WIPER SW LOW REF WINDSHIELD WIPER SW LOW SIG WINDSHIELD WIPER/WASHER SWITCH WIPER SWITCH YEL/BLU WIRE YEL/BRN WIRE