GMC Rally G3500 (1985-1996) Backup lamps circuit

BLK WIRE CONVENIENCE CENTER (UNDER LEFT SIDE OF I/P) HOT IN RUN OR START I/P FUSE BLOCK LEFT BACKUP LAMP LT GRN WIRE PARK/NEUTRAL POSITION SWITCH (LEFT SIDE OF TRANS.) PNK WIRE RIGHT BACKUP LAMP TURN B/U FUSE 16 W/ OPTIONAL TRAILER WIRING PACKAGE (RIGHT REAR OF INTERIOR)