Back-up lamps circuit, motor home chassis for GMC Forward Control P3500 (1985-1999)

AUTO APPLY FUSE 19 HOT IN I/P FUSE BLOCK LEFT BACKUP LAMP LT GRN WIRE PARK/NEUTRAL POSITION (PNP), BACKUP LAMP SWITCH (LEFT SIDE OF TRANSMISSION) PNK WIRE PROVISION FOR BACKUP LAMPS RIGHT BACKUP LAMP RUN WIRE