Backup Lamps Inoperative

Symptom:
*BACKUP LAMPS INOPERATIVE

Test 1-4:

Test 5-6:

POSSIBLE CAUSES
- OPEN BACKUP LAMP BULB(S)
- BACKUP LAMP GROUND CIRCUIT OPEN
- BACKUP LAMP SUPPLY CIRCUIT OPEN
- FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN
- TRANSMISSION RANGE SENSOR
- INTERMITTENT BACKUP LAMPS