Backup Lamp: Description and Operation

The backup lamps are incorporated into the tail lamps. The backup lamps operate with the ignition switch in the ON position. Placing the transmission in the R (reverse) position closes the backup lamps circuit and turns the backup lamps on. Voltage applies through the TURN fuse to one of the following components:
- The backup lamp switch on manual transmissions.
- The Park/Neutral Position (PNP) switch on 3-speed automatic transmissions.
- The transmission range switch on 4-speed automatic transmissions.

The voltage applies to the backup lamps in the tail lamps. Since the tail lamps are ground permanently at G400, the lamps will light.