Inspection and Verification

1. Verify the customer concern by operating the vehicle stoplamps, turn signals and rear lamps. If the vehicle exterior lamps do not operate correctly, refer to Brake Lamp, Turn Signal and Hazard Lamps, or Parking, Rear and License Lamps.
2. Visually inspect for obvious signs of mechanical and electrical damage.
3. If the vehicle exterior lamps operate correctly, verify the operation of the trailer stoplamps, turn signals and tail lamps.







VISUAL INSPECTION CHART

4. If the concern remains after the inspection, proceed to Symptom Chart to continue diagnostics. Symptom Related Diagnostic Procedures