Backup Lamps Inoperative

Test 1 - 4:

Test 5 - 8:

Test 9 - 10:

SYMPTOM
BACKUP LAMPS INOPERATIVE

POSSIBLE CAUSES
- Open left backup lamp bulb
- Open right backup lamp bulb
- Backup lamp ground circuit open
- Backup lamp supply circuit open
- Fused ignition switch output circuit open
- Backup lamp supply circuit short to ground
- Transmission range sensor
- Intermittent wiring and connectors