F 150 2WD Pickup V8-5.4L SOHC VIN 3 (1999)
Trailer Connector: Flow of Diagnosis
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
^
Battery Junction Box (BJB) Fuse 5 (20A)
^
BJB Fuse 19 (10A)
^
BJB Fuse 20 (10A)
^
BJB Fuse 101 (30A)
^
BJB Fuse 108 (30A)
^
Central Junction Box (CJB) Fuse 23 (10A)
^
CJB Fuse 13 (10A)
^
Corroded/loose connector(s)
^
Loose/broken wire(s)
^
Failed bulb(s)
3. If the concern is not visually evident, determine the symptom and proceed to the Symptom Chart. See: Trailer Lamps/Testing and
Inspection/Symptom Related Diagnostic Procedures
