Ford Econoline E150 (1997-2012) Backup lamps circuit, without stripped chassis

BLK WIRE BLK/PNK WIRE CENTRAL JUNCTION BOX LEFT SIDE OF DASH, NEAR KICK PANEL) DIGITAL TRANSMISSION RANGE (DTR) SENSOR (ON LEFT SIDE OF TRANSMISSION) EXCEPT DIESEL FUSE 12 HOT IN RUN LEFT REVERSING LAMP REVERSING LAMP TRAILER TOW RELAY RIGHT REVERSING LAMP WHT/VIO WIRE