Current is supplied to terminal B on the Park Neutral Position Switch from the 10 Amp TRN-B/U fuse through CKT 539. When the shift lever is placed in reverse the switch allows current to flow out terminal F through CKT 24.

Current is supplied to terminal B of the Back-up Switch from the 10 Amp TRN-B/U fuse through CKT 539. When the switch is closed current flows out terminal A through CKT 24.

On both systems current flows from CKT 24 into terminals A of the right and left back-up lamps. Both Lamps are grounded through CKT 150.