Flow of Diagnosis

1. Verify the customer concern by operating the backup lamps.
2. Visually inspect for obvious signs of mechanical and electrical damage:

VISUAL INSPECTION CHART

Mechanical
^ Damaged backup lamp switch

Electrical
^ Blown fuse(s)
^ Damaged wiring harness
^ Loose or corroded connections
^ Damaged backup lamp
^ Damaged Digital Transmission Range (DTR) sensor

3. If the concern is not visually evident, determine the symptom and proceed to Symptom Chart. Symptom Related Diagnostic Procedures