Backup Lamps Inoperative

SYMPTOM BACKUP LAMPS INOPERATIVE

POSSIBLE CAUSES
- BACK UP LAMP GROUND CIRCUIT OPEN
- BACKUP LAMP SUPPLY CIRCUIT OPEN
- FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN
- BACKUP LAMP SUPPLY CIRCUIT SHORT TO GROUND
- OPEN BACKUP LAMP BULBS
- TRANSMISSION RANGE SENSOR