Backup Lamps
WARNING: This page is about a different car, the 2002 Oldsmobile Intrigue. However, it is still accessible from the selected car via links, so may be relevant.
The back-up lamps operate when the ignition switch is in the RUN position and the transaxle range selector lever is in REVERSE.
The R/CMPT REL fuse supplies battery voltage at all the times to the park/neutral position switch. When the park/neutral position switch is place in REVERSE battery voltage is applied to the backup lamps illuminating the lamps. The backup lamps receive a ground signal from G301 and G302.