Flow of Diagnosis

1. The interior lighting is controlled by a Central Timer Module (CTM).
2. Verify the customer concern.
3. Check for concerns with the following:

VISUAL INSPECTION CHART

Mechanical
^ Damaged switches
^ After-market accessories

Electrical
^ Fuse(s)
^ Bulb(s)
^ Damaged wiring harness
^ Circuit
^ Connections
^ After-market accessory

4. If the concern is not visually evident, Symptom Related Diagnostic Procedures