Expedition 4WD V8-4.6L SOHC VIN W (1999)
Trailer Lamps: Flow of Diagnosis
1. Verify the customer concern by operating the trailer towing package.
2. Visually inspect for obvious signs of electrical damage.
VISUAL INSPECTION CHART
Electrical
^
Battery junction box (BJB) Fuse 5 (20 A)
^
BJB Fuse 19 (10 A)
^
BJB Fuse 2O (10 A)
^
BJB Fuse 101 (30 A)
^
BJB Fuse 108 (30 A)
^
Central junction box (CJB) Fuse 23 (10 A)
^
CJB Fuse 13 (10 A)
^
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: Symptom Related Diagnostic Procedures
