Backup Lamps

The BACKUP/STOP fuse in the underhood fuse block supplies battery positive voltage to the normally open park/neutral position (PNP) switch of a vehicle equipped with an automatic transmission or the backup lamp switch if equipped with a manual transmission. When the driver places the gear selector lever is in the REVERSE position, the switch closes and the current flow is from the switch to the backup lamps. The engine may need to be running for the backup lamps to function.