Backup Lamps Inoperative

*BACKUP LAMPS INOPERATIVE

POSSIBLE CAUSES:
OPEN LEFT BACKUP LAMP BULB
OPEN RIGHT BACKUP LAMP BULB
INTERMITTENT WIRING AND CONNECTORS
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