F 150 4WD Pickup V8-5.4L CNG VIN M (2001)
Brake Lamp: Initial Inspection and Diagnostic Overview
1. Verify the customer concern by operating the stoplamps.
2. Visually inspect for obvious signs of mechanical and electrical damage.
Visual Inspection Chart
3. If the concern is not visually evident, determine the symptom and proceed to the Symptom Chart. See: Symptom Related Diagnostic Procedures