Cadillac CT6 I facelift (2018-2023) headlights system Wiring diagrams

AIR QUALITY SENSOR AMBIENT LIGHT/SUNLOAD SENSOR (W/ STOP/START SYSTEM) (TOP CENTER OF DASH) AUTO AUXILIARY BLOWER MOTOR AUXILIARY BLOWER MOTOR CONTROL MODULE BATT POS BLK WIRE BLOWER MOTOR BLU WIRE BLU/BRN WIRE BLU/GRY WIRE BLU/YEL WIRE COMPUTER DATA LINES SYSTEM DISPLAY DOOR LOCKS, ANTI-THEFT SYSTEMS FAN DOWN FAN UP GRN WIRE GRN/BLK WIRE GRN/YEL WIRE GROUND GRY WIRE HEADLIGHTS SYSTEM HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED HVAC CONTROLS IGN LOGIC LOW REF MOTOR CTRL OFF PASSENGER RADIO/ HVAC CONTROLS REAR BODY FUSE BLOCK REAR WINDOW DEFOGGER IND RED/BLU WIRE RED/VIO WIRE SENS SIG SPEED CTRL SWITCH TEMPERATURE VIO WIRE VIO/BLK WIRE VIO/GRN WIRE VIO/WHT WIRE VOLT WHT WIRE

12 VOLT REF 5 VOLT REF ACC IGN VOLT ACTUATOR LO REF AMBIENT LT SENS SIG ANTI-LOCK BRAKES SYSTEM ANTI-LOCK BRAKES, CRUISE CONTROL, EXTERIOR LIGHTS SYSTEMS ANTI-LOCK BRAKES, ELECTRONIC SUSPENSION SYSTEMS ANTI-THEFT SYSTEM ANTI-THEFT SYSTEM CRUISE CONTROL SYSTEM AUTO HOLD SW SIG BATT POSITIVE VOLT BLK WIRE BLK/BRN WIRE BLK/GRY WIRE BLU WIRE BLU/GRY WIRE BLU/ORG WIRE BLU/VIO WIRE BLU/WHT WIRE BLU/YEL WIRE BODY CONTROL MODULE (LOWER LEFT END OF DASH) BRAKE APPLY SENS CTRL BRK APPLY SENS LO REF BRK APPLY SENS SIG BRN WIRE BRN/BLU WIRE BRN/GRN WIRE BRN/WHT WIRE BRN/YEL WIRE CAMERA WASH SIG CHARGE IND CTRL COMPUTER DATA LINES SYSTEM COURTESY LP CTRL CRUISE CONTROL SYSTEM CRUISE CONTROL, ANTI-LOCK BRAKES, EXTERIOR LIGHTS SYSTEMS DIMM SW SIG DIMMER SW LOW REF DOME/READING LP DISABLE SW SIG DOOR LOCKS, ANTI-THEFT SYSTEMS DRV DR LK SW LK SIG DRV DR LK SW UNLK FRON FOOTWELL ACCENT LT CTRL GAP UP/DOWN SW SIG GLOVE BOX DOOR RELEASE SIG GLOVE BOX DR RELEASE RLY CTRL GRN WIRE GRN/GRY WIRE GRN/VIO WIRE GRN/WHT WIRE GRY WIRE GRY/BLK WIRE GRY/GRN WIRE GRY/WHT WIRE HAZARD SW SIG HDLP SW FLASH SIG HDLP SW HDLPS OFF SIG CTRL HDLP SW ON SIG HDLP SW PARK LP SIG HEADLIGHTS SYSTEM HI BEAM SIG HORN SW SIG HORNS SYSTEM HOT AT ALL TIMES IGN MODE SW ACC LED SIG IGN MODE SW ST LED SIG IGN MODE SW VOLT IMMO CTRL MODULE SPLY IND CTRL IND DIMMING CTRL INSTRUMENT PANEL FUSE BLOCK INTERIOR LP CONTROL LED BACKLIGHT DIMM CTRL LF TURN SIG SW SIG LIN BUS POWER DISTRIBUTION SYSTEM REAR BODY FUSE BLOCK REAR FOG LP SW SIG RED/BLU WIRE RED/BRN WIRE RED/GRY WIRE RED/VIO WIRE RED/WHT WIRE REMOTE FUNCTION ACTR TRANS SIG RESUME/ACCELERATE SW SIG RF TURN SIG SW SIG RUN/CRANK IGN 1 VOLT SECURITY IND CTRL SERIAL DATA SERIAL DATA (+) 1 ACTUATOR CTRL SERIAL DATA (+) 1 REMOTE FUNCTION ACTR RECEIVE SIG SERIAL DATA (-) (1) SERIAL DATA LIN BUS 11 SERIAL LIN BUS 4 SHIFT INTERLOCK SYSTEM STARTING/CHARGING SYSTEM STOP START SW SIG STRG COLUMN LCK STATUS SIG TAP UP/TAP DOWN SW SIG TRACTION CTRL SW SIG 1 TRANSMISSIONS SYSTEM VEH ANTI-THEFT SYS IMMOBILIZER LO REF VIO/BLK WIRE VIO/GRN WIRE VIO/YEL WIRE WHT WIRE WHT/BLK WIRE WHT/RED WIRE WINDSHIELD WASHER SW SIG WINDSHIELD WIPER SW HI SIG WINDSHIELD WIPER SW LO REF WINDSHIELD WPR SW LO SIG WIPER/WASHER SYSTEM YEL WIRE YEL/BLU WIRE YEL/BRN WIRE YEL/GRN WIRE

ACC WAKEUP SERIAL DATA ACTIVE SIG ACTUATOR LOCK CTRL BACKUP LAMP CTRL BATT POSITIVE VOL BATT 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/GRN WIRE BRN/GRY WIRE BRN/VIO WIRE BRN/WHT WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM CORNERING LAMP RLY CTRL COURTESY LP SW SIG CRUISE CONTROL, ANTI-LOCK BRAKES SYSTEMS CRUISE/ETC/TCC BRAKE SIG DOME LP OFF IND CTRL DOME/READING LAMP CTRL DOOR LOCKS, ANTI-THEFT SYSTEMS DR LK ACTR UNLCK CTRL DR LK CTRL ENGINE CONTROLS SYSTEM EXTERIOR LIGHTS SYSTEM WIPER/WASHER SYSTEM EXTERIOR LIGHTS, HEADLIGHTS SYSTEMS FDBACK SIG FEEDBACK SIG FR WINDSHIELD WIP SW HI SIG FUEL DR LK RLY CTRL GRN WIRE GRN/BLU WIRE GRN/BRN WIRE GRN/GRY WIRE GRN/VIO WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE GRY/BLU WIRE GRY/BRN WIRE GRY/VIO WIRE GRY/YEL WIRE HDLP HI BEAM RLY CTRL HDLP RLY COIL CTRL HDLP WASHER RLY CTRL HEADLIGHTS SYSTEM HEADLIGHTS, EXTERIOR LIGHTS SYSTEMS HI BEAM AUTO ON/OFF SW SIG HOOD STATUS B SIGNAL HORN RLY CTRL HORNS SYSTEM HOT AT ALL TIMES INADVERTENT PWR CTRL LED AMBIENT LIGHTING CTRL 1 LED BACKLIGHT DIMM CTRL LF DRL CTRL LF TURN SIG LP CTRL LH HDLP LO BEAM CTRL LH HEADLAMP RLY CTRL LH PARK LP CTRL LIFTGATE AJAR SW SIG LIN BUS 1 LIN BUS 2 LIN BUS 3 LO SPD GMLAN SERIAL DATA LOGISTIC MODE RLY OPEN CTRL LR STP LP CTRL LR TURN SIG LP CTRL MALFUNCTION IND CTRL MTR UNLATCH CTRL PASS DR LK SW LK CTRL PASS DR LOCK SW UNLCK CTRL POWER DISTRIBUTION SYSTEM REAR BODY FUSE BLOCK REAR COURTESY LP CTRL RED/GRN WIRE RED/WHT WIRE RF DRL CTRL RF TURN SIG LP CTRL RH HDLP LO BEAM CTRL RH PARK LP CTRL RLY CLOSE CTRL RR CLOSURE HANDLE SW OPEN SIG RR LICENSE LP CTRL RR STOP LP CTRL RR TURN LP FEEDBACK SIG RR TURN SIG LP CTRL RUN/CRANK RLY COIL CTRL SECURITY LOCK RLY CTRL SERIAL DATA (-) (1) SERIAL DATA COMM ENABLE STP LP RLY COIL CTRL TRUNK, TAILGATE, FUEL DOORS SYSTEM UNLATCH SIG VIO/BLK WIRE VIO/BLU WIRE VIO/GRY WIRE VIO/WHT WIRE VIO/YEL WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/BRN WIRE WHT/GRY WIRE WHT/VIO WIRE WHT/YEL WIRE WINDSHIELD WASHER RLY CTRL WINDSHIELD WIPER MTR PRK SW SIG WINDSHIELD WIPER MTR RLY COIL CTRL WIPER/WASHER SYSTEM YEL WIRE YEL/BLU WIRE YEL/BRN WIRE

BATTERY FUSE BLOCK BLK WIRE BLK/BRN WIRE BLK/WHT WIRE BLU WIRE BLU/BRN WIRE BLU/WHT WIRE BLU/YEL WIRE GRN WIRE GRN/VIO WIRE GROUND DISTRIBUTION SYSTEM GRY WIRE GRY/BLU WIRE GRY/GRN WIRE HEADLIGHTS SYSTEM HOT AT ALL TIMES LEFT CORNERING LAMP LEFT FRONT PARK LAMP LEFT FRONT TURN SIGNAL LAMP LEFT HEADLAMP ASSEMBLY LEFT HEADLAMP MULTI-FUNCTION LED LEFT HEADLAMP MULTI-FUNCTION LED CONTROL MODULE LEFT HEADLAMP RELAY LEFT PARK DAYTIME RUNNING LAMP LEFT REAR EXTERIOR DOOR HANDLE ASSEMBLY LEFT REAR EXTERIOR DOOR HANDLE COURTESY LAMP LOGIC MULTI-FUNCTION ENERGY STORAGE CAPACITOR CONTROL MODULE N/A REAR BODY FUSE BLOCK RED WIRE RED/GRY WIRE RIGHT REAR EXTERIOR DOOR HANDLE ASSEMBLY RIGHT REAR EXTERIOR DOOR HANDLE COURTESY LAMP VIO/BLK WIRE VIO/GRY WIRE VIO/WHT WIRE WHT WIRE WHT/YEL WIRE YEL WIRE YEL/BRN WIRE YEL/GRY WIRE YEL/WHT WIRE

3.6L VIN S 4.2L TWIN TURBO AUTO BLK WIRE BLK/BRN WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/BRN WIRE BLU/WHT WIRE BLU/YEL WIRE BRAKE PEDAL POSITION SENSOR BRK POSITION SENS BRK POSITION SENS LOW REF BRK POSITION SENS SIG COMPUTER DATA LINES SYSTEM DRIVER INFORMATION CENTER DISPLAY ENGINE CONTROL MODULE GRN WIRE GRN/VIO WIRE GROUND DISTRIBUTION SYSTEM GRY/GRN WIRE HEAD HEADLIGHTS SYSTEM HI SPD GMLAN SERIAL DATA (+) 1 HI SPD GMLAN INSTRUMENT CLUSTER J156 (2.0L TURBO) J192 (4.2L TWIN TURBO) J168 (2.0L TURBO) J193 (4.2L TWIN TURBO) LEFT LEFT TURN IND LOGIC LOW SPD GMLAN SER DATA OFF PARK PARK IND RIGHT RIGHT CORNERING LAMP RIGHT FRONT PARK LAMP RIGHT FRONT TURN SIGNAL LAMP RIGHT HEADLAMP ASSEMBLY RIGHT HEADLAMP MULTI-FUNCTION LED RIGHT HEADLAMP MULTI-FUNCTION LED CONTROL MODULE RIGHT PARK DAYTIME RUNNING LAMP RIGHT TURN IND RUN/CRANK IGNITION 1 VOLTAGE SERIAL DATA (-) (1) TURN SIGNAL/ MULTI-FUNCTION SWITCH VIO/GRY WIRE VIO/WHT WIRE WHT WIRE WHT/GRN WIRE WHT/RED WIRE WHT/YEL WIRE YEL/WHT WIRE

ACCESSORY IGN VOLTAGE ACTIVE SIG ACTUATOR CTRL ACTUATOR LO REF ACTUATOR LOCK CTRL ACTUATOR RECEIVE SIG BATT POS VOLT BEAM RLY CTRL BLK WIRE BLU WIRE BLU/BRN WIRE BLU/VIO WIRE BLU/WHT WIRE BODY CONTROL MODULE (LOWER LEFT END OF DASH) BRN WIRE BRN/GRN WIRE BRN/VIO WIRE BRN/WHT WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM DOOR DEAD LOCK RELAY DOOR LOCK CTRL DRIVER DOOR LATCH ASSEMBLY DRIVER WINDOW SWITCH FUEL DOOR LOCK ACTUATOR FUEL DOOR LOCK RELAY FUEL DR LOCK RELAY CTRL GLOVE BOX DOOR RELEASE RLY CTRL LCK STATUS SIG GLOVE BOX DOOR RELEASE SIG GLOVE BOX DOOR SIG RELEASE GLOVE BOX) GRN/WHT WIRE GRN/YEL WIRE GRY WIRE GRY/WHT WIRE HEADLIGHTS SYSTEM HOOD STATUS B SIG HORN RELAY CTRL HORNS SYSTEM HOT AT ALL TIMES INSTRUMENT PANEL FUSE BLOCK INSTRUMENT PANEL MULTI-FUNCTION SWITCH 2 LF DR AJAR LIFTGATE AJAR SW SIG 1 LOCK SIGNAL LOGIC LOGIC DRIVER WINDOW MOTOR MOTOR STATUS SIG NETWORK BUS 3 REAR BODY FUSE BLOCK REAR COMPARTMENT LID LATCH RED/BLU WIRE RED/BRN WIRE RED/WHT WIRE RUN/CRANK IGN 1 VOLT SECURITY IND CTRL SECURITY LOCK RLY CTRL SERIAL DATA (-) (1) SW LOCK CTRL SW SIG SW UNLOCK CTRL TRANSMIT SIG UNLOCK CTRL UNLOCK SIG UNLOCK SIGNAL VIO/BLK WIRE VIO/GRY WIRE VIO/YEL WIRE WHT WIRE WHT/VIO WIRE YEL WIRE YEL/BLU WIRE YEL/GRN WIRE

ACCESSORY IGN VOLTAGE ACTIVE SIG ACTUATOR CTRL ACTUATOR LO REF ACTUATOR LOCK CTRL ACTUATOR RECEIVE SIG BATT POS VOLT BEAM RLY CTRL BLK WIRE BLU WIRE BLU/BRN WIRE BLU/VIO WIRE BLU/WHT WIRE BODY CONTROL MODULE (LOWER LEFT END OF DASH) BRN WIRE BRN/GRN WIRE BRN/VIO WIRE BRN/WHT WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM DOOR DEAD LOCK RELAY DOOR LOCK CTRL DRIVER DOOR LATCH ASSEMBLY DRIVER WINDOW SWITCH FUEL DOOR LOCK ACTUATOR FUEL DOOR LOCK RELAY FUEL DR LOCK RELAY CTRL GLOVE BOX DOOR RELEASE RLY CTRL LCK STATUS SIG GLOVE BOX DOOR RELEASE SIG GLOVE BOX DOOR SIG RELEASE GLOVE BOX) GRN/WHT WIRE GRN/YEL WIRE GRY WIRE GRY/WHT WIRE HEADLIGHTS SYSTEM HOOD STATUS B SIG HORN RELAY CTRL HORNS SYSTEM HOT AT ALL TIMES INSTRUMENT PANEL FUSE BLOCK INSTRUMENT PANEL MULTI-FUNCTION SWITCH 2 LF DR AJAR LIFTGATE AJAR SW SIG 1 LOCK SIGNAL LOGIC LOGIC DRIVER WINDOW MOTOR MOTOR STATUS SIG NETWORK BUS 3 REAR BODY FUSE BLOCK REAR COMPARTMENT LID LATCH RED/BLU WIRE RED/BRN WIRE RED/WHT WIRE RUN/CRANK IGN 1 VOLT SECURITY IND CTRL SECURITY LOCK RLY CTRL SERIAL DATA (-) (1) SW LOCK CTRL SW SIG SW UNLOCK CTRL TRANSMIT SIG UNLOCK CTRL UNLOCK SIG UNLOCK SIGNAL VIO/BLK WIRE VIO/GRY WIRE VIO/YEL WIRE WHT WIRE WHT/VIO WIRE YEL WIRE YEL/BLU WIRE YEL/GRN WIRE