ford Workshop Repair Guides

Ford Workshop Service and Repair Manuals

Trailer Lamps|Flow of Diagnosis|Page 9638 > < Trailer Lamps|Flow of Diagnosis
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Trailer Lamps: Initial Inspection and Diagnostic Overview

Special Service Tool(s)

SPECIAL TOOLS

1. Verify the customer concern by operating the trailer tow lights.
2. Verify the exterior lighting system of the vehicle is operating properly. If not, refer to the appropriate Pinpoint Test.
3. Visually inspect for obvious signs of mechanical and electrical damage:

VISUAL INSPECTION CHART

Electrical
^

Blown fuse(s)

^

Loose or corroded connections

^

Circuity

^

Damaged relays

^

Failed bulb(s)

4. If the fault is not visually evident, determine the symptom and proceed to the Symptom Chart.  See: Symptom Related Diagnostic Procedures

Trailer Lamps|Flow of Diagnosis|Page 9638 > < Trailer Lamps|Flow of Diagnosis