Backup Lamp: Description and Operation

BACKUP LAMPS
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 reverse (R) 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.