Operation CHARM: Car repair manuals for everyone.

Backup Lamp: Description and Operation

With the Ignition Switch in RUN or START, voltage is supplied from the TURN B/U Fuse to the Backup Lamp Switch. Whenever the gear selector lever is shifted to REVERSE, the Backup Lamp Switch closes and voltage is supplied to the Backup Lamps. The Backup Lamps remain lit as long as the switch is closed.