Car Wiring Diagrams for Headlights circuit for GMC Sierra IV (2018-2022)

AMBIENT LIGHT SENS SIG AMBIENT LIGHT/ SUNLOAD SENSOR BATT POS VOLT 21 BATT POS VOLT 25 BATT POS VOLT 29 BLK WIRE BLK/GRN WIRE BLK/WHT WIRE BLU WIRE BLU/BRN WIRE BODY CONTROL MODULE (UNDER LEFT SIDE OF DASH) BRN/VIO WIRE BRN/WHT WIRE CHEVROLET COMPUTER DATA LINES SYSTEM DIMMER SWITCH FLASH TO PASS FOG LAMP RLY CTRL FRONT TURN SIG LAMP FEEDBACK SIG GMC GMLAN SERIAL DATA - 1 GND 18 GRN WIRE GRN/BRN WIRE GRN/YEL WIRE GROUND DISTRIBUTION SYSTEM GRY/BLU WIRE HAVC CONTROL HDLP HI BEAM RLY CTRL HDLP SW FLASH SIG HI BEAM SELECT SW HI BEAM SIG HDLP SW ON SIG HDLP SW OFF SIG HDLP SW REF HDLP SW SIG HIGH BEAM ASSIST HIGH BEAM AUTO ON/OFF SWITCH SIGNAL HOT AT ALL TIMES HVAC CONTROL MODULE LEFT HDLP RLY CTRL LEFT HEADLAMP ASSEMBLY LEFT HIGH BEAM HEADLAMP LEFT LOW BEAM HEADLAMP LF DRL CTRL LH HDLP LOW BEAM CTRL LOW REFERENCE LOW SPEED GMLAN MODULE LIN BUS 1 RED/BLU WIRE RED/BRN WIRE RED/GRY WIRE RF DOOR AJAR SW SIG RH HDLP LOW BEAM CTRL RIGHT FRONT DRL CTRL RIGHT HEADLAMP ASSEMBLY RIGHT HIGH BEAM HEADLAMP RIGHT INSTRUMENT PANEL FUSE BLOCK RIGHT LOW BEAM HEADLAMP SERIAL DATA SOLAR SENSOR TURN SIGNAL/ MULTI-FUNCTION SWITCH VIO/BLK WIRE W/ LED W/O LED WHT WIRE WHT/BLU WIRE WHT/BRN WIRE WHT/GRY WIRE WHT/VIO WIRE WHT/YEL WIRE YEL WIRE YEL/BRN WIRE

BATTERY FUSE BLOCK BLK WIRE BLU WIRE BLU/BRN WIRE BRN WIRE BRN/VIO WIRE BRN/WHT WIRE CHEVROLET FRONT FOG LAMP RELAY GMC GRN/BRN WIRE GROUND DISTRIBUTION SYSTEM GRY WIRE GRY/BLU WIRE HEADLAMP HIGH BEAM RELAY HEADLAMP RELAY HOT AT ALL TIMES LEFT DAYTIME RUNNING LAMP, LEFT HEADLAMP LEFT HEADLAMP ASSEMBLY LEFT HEADLAMP MULTI-FUNCTION LED CONTROL MODULE RED/GRN WIRE RIGHT DAYTIME RUNNING LAMP RIGHT HEADLAMP RIGHT HEADLAMP ASSEMBLY RIGHT HEADLAMP MULTI-FUNCTION LED CONTROL MODULE UNDERHOOD FUSE BLOCK VIO/BLK WIRE W/ LED W/O LED WHT WIRE WHT/BRN WIRE WHT/VIO WIRE WHT/YEL WIRE YEL WIRE YEL/BRN WIRE YEL/GRY WIRE

BLK WIRE BLK/WHT WIRE BLU WIRE BLU/BRN WIRE BRN WIRE BRN/VIO WIRE COMPUTER DATA LINES SYSTEM DRIVER INFORMATION CENTER DISPLAY FRONT FOG LIGHT IND GMC GND 18 GRN/BRN WIRE GRY WIRE GRY/BLU WIRE GRY/GRN WIRE HIGH BEAM IND HOT W/ IGNITION MAIN RELAY ENERGIZED INSTRUMENT CLUSTER LEFT DAYTIME RUNNING LAMP, LEFT FRONT FOG LAMP LEFT HEADLAMP LEFT HEADLAMP ASSEMBLY LEFT HEADLAMP MULTI-FUNCTION LED CONTROL MODULE LOGIC LOGIC (W/ BASE) LOW SPD GMLAN SERIAL DATA 2 RIGHT DAYTIME RUNNING LAMP RIGHT FRONT FOG LAMP RIGHT HEADLAMP RIGHT HEADLAMP ASSEMBLY RIGHT HEADLAMP MULTI-FUNCTION LED CONTROL MODULE RIGHT INSTRUMENT PANEL FUSE BLOCK RUN/CRANK IGN 1 VOL 16 VIO WIRE VIO/BLK WIRE W/ BASE W/O BASE WHT WIRE WHT/BRN WIRE WHT/VIO WIRE WHT/YEL WIRE YEL WIRE YEL/GRY WIRE

AUTO BLK/WHT WIRE BLU/BLK WIRE BLU/VIO WIRE BRN WIRE COMMUNICATION ENABLE COMPUTER DATA LINES DIMMER SWITCH ELECTRONIC BRAKE CONTROL MODULE (BEHIND UNDERHOOD FUSE BLOCK) FRONT FOG LAMP SWITCH GRN/BRN WIRE GRY/RED WIRE HEAD HEADLAMP SWITCH MONITOR SIG 1 MONITOR SIG 2 OFF PARK PARK BRAKE PARK BRAKE CONTROL SWITCH PARK BRAKE SW PARK BRAKE SW SIG SERIAL DATA SW TEST SIG SYSTEM VOL REF 1 VOL REF 2 WHT/BLU WIRE WHT/BRN WIRE WHT/VIO WIRE YEL WIRE YEL/RED WIRE