With Automatic Transmission

The backup lamp system consists of:
^ Backup lamp assemblies with replaceable miniature bulbs. (part of the reflector)
^ Transmission range sensor
^ Circuit wiring
^ Circuit protection

Power is provided to the backup lamp miniature bulbs, through either the backup lamp switch or the transmission range sensor and through circuit protection in the instrument panel fuse junction panel.

Ground is provided through Circuit 31 (BK).