GMC Cab & Chassis C3500 (1985-2000) Backup lamps circuit

BACKUP LAMPS SIGNAL (TRAILER TOW PACKAGE) (WIRE CUT AND TAPED TO HARNESS) BLK WIRE FROM LICENSE LAMP BREAKOUT) HOT IN RUN OR START I/P FUSE BLOCK LEFT BACKUP LAMP LT GRN WIRE MIRRORS SYSTEM PARK/NEUTRAL POSITION SWITCH (LEFT CENTER OF TRANSMISSION) PNK A/T WIRE PNK M/T WIRE PNK WIRE RIGHT BACKUP LAMP TURN B/U FUSE 16