Trailer tow circuit for Buick Envision II (2020-2024)

AUXILIARY PARK LAMP RLY CTRL BLK WIRE BRN WIRE ENGINE WIRING HARNESS JUNCTION BLOCK GRN WIRE GRN/BRN WIRE GRN/VIO WIRE GRY/BRN WIRE HOT AT ALL TIMES LEFT TRAILER STOP/ TURN SIGNAL LAMP RELAY LIGHTING CONTROL MODULE (RIGHT SIDE OF DASH) LR TRAILER STOP/ TURN LAMP CTRL PARKING LAMP RELAY RIGHT TRAILER STOP/ TURN SIGNAL LAMP RELAY RR TRAILER STOP/ TURN LAMP CTRL TRAILER WIRING HARNESS CONNECTOR WHT WIRE WHT/BRN WIRE YEL WIRE YEL/BLU WIRE YEL/GRY WIRE