F 150 2WD Pickup V8-5.4L SOHC VIN 3 (1999)
Trailer Connector: Initial Inspection and Diagnostic Overview
1. Verify the customer concern by operating the trailer towing package.
2. Visually inspect for the following obvious signs of electrical damage.
VISUAL INSPECTION CHART
Electrical
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Battery Junction Box (BJB) Fuse 5 (20A)
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BJB Fuse 19 (10A)
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BJB Fuse 20 (10A)
^
BJB Fuse 101 (30A)
^
BJB Fuse 108 (30A)
^
Central Junction Box (CJB) Fuse 23 (10A)
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CJB Fuse 13 (10A)
^
Corroded/loose connector(s)
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Loose/broken wire(s)
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Failed bulb(s)
3. If the concern is not visually evident, determine the symptom and proceed to the Symptom Chart. See: Towing / Trailer System/Trailer
Lamps/Testing and Inspection/Symptom Related Diagnostic Procedures
