F 550 4WD Super Duty V8-7.3L DSL Turbo VIN F (2001)
Trailer Connector: Initial Inspection and Diagnostic Overview
1. Verify the customer concern by operating the trailer towing package.
2. Visually inspect for obvious signs of electrical damage.
VISUAL INSPECTION CHART
Electrical
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Battery Junction Box (BJB) fuse:
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20 (7.5 A)
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22 (7.5 A)
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4 (20 A)
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110 (30 A)
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115 (30 A)
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Circuitry
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Lamps
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Trailer tow parking lamps relay
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Trailer tow backup lamps relay
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Trailer tow battery charge relay
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Trailer tow electric brake controller
3. If the concern is not visually evident, verify the symptom and proceed to the Symptom Chart. See: Towing / Trailer System/Trailer Lamps/Testing
and Inspection/Symptom Related Diagnostic Procedures
