Expedition 4WD V8-5.4L SOHC VIN 5 (2005)
Trailer Lamps: Initial Inspection and Diagnostic Overview
INSPECTION AND VERIFICATION
1. Verify the customer concern.
2. Visually inspect for obvious signs of mechanical or electrical damage.
VISUAL INSPECTION CHART
Electrical
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Central junction box (CJB) fuse(s):
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10 (20A)
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13 (10A)
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29 (30A)
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6 (10A)
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2 (10A)
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106 (30A)
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Circuitry
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Lamps
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Trailer tow battery charge relay
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Trailer tow park lamp relay
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Trailer tow electric brake controller
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CJB
3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
4. If the concern is not visually evident, verify the symptom and refer to the Symptom Chart. See: Symptom Related Diagnostic Procedures