ford Workshop Repair Guides

Ford Workshop Service and Repair Manuals

Initial Inspection and Diagnostic Overview|Page 8690 > < Diagram Information and Instructions|Page 8687
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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):
-

10 (20A)

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13 (10A)

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29 (30A)

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(10A)

-

(10A)

-

106 (30A)

-

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

Initial Inspection and Diagnostic Overview|Page 8690 > < Diagram Information and Instructions|Page 8687