Trailer tow circuit for GMC Terrain II (2017-2021)

BACKUP RLY CTRL BATT POS VOLT BCM 3 FUSE BLK WIRE BLU WIRE BLU/BRN WIRE BLU/PPL WIRE BLU/WHT WIRE BODY CONTROL MODULE COMPUTER DATA LINES SYSTEM EXTERIOR LAMPS CIRCUIT FUSE 1 GRN/PPL WIRE GRY/BRN WIRE HI SPD GMLAN SER DATA (+) 1 HOT AT ALL TIMES INSTRUMENT PANEL FUSE BLOCK LD TRAILR FUSE LEFT TRAILER STOP/TURN SIGNAL LAMP RELAY LH RR TURN SIG LP CTRL RH RR TURN SIG LP CTRL LT TRLR TRN/ SIG FUSE RED/GRN WIRE RED/GRY WIRE RED/WHT WIRE RIGHT TRAILER STOP/ TURN SIGNAL LAMP RELAY RT TRLR TRN/ SIG FUSE TRAILER BACKUP LAMPS RELAY TRAILER BRK APPLY SIG TRAILER CONNECTOR (W/ TRAILER BRAKE PROVISIONS) (UNDER CENTER REAR OF VEHICLE) TRAILER CONNECTOR (W/O TRAILER BRAKE PROVISIONS) (UNDER CENTER REAR OF VEHICLE) TRLR AUX PWR FUSE TRLR BCK/UP FUSE TRLR BRK FUSE UNDERHOOD FUSE BLOCK W/ TRAILER BRAKE PROVISIONS W/O TRAILER BRAKE PROVISIONS WHT WIRE WHT/BLU WIRE WHT/GRN WIRE YEL/GRY WIRE