Inspection and Verification
WARNING: This page is about a different car, the 2004 Mercury Mountaineer and 2004 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
- Verify the customer concern.
- Verify the exterior lighting system of the vehicle is operating correctly. If not, refer to the appropriate pinpoint test.
- Visually inspect for obvious signs of mechanical or electrical damage.VISUAL INSPECTION CHART
Electrical - Battery junction box (BJB) fuse(s):
- 13 (40A)
- 20 (30A)
- 27 (20A)
- Central junction box (CJB) fuse 25 (5A)
- Circuity
- Relay(s)
- Bulb(s)
NOTE: When diagnosing the trailer tow lamps, begin by verifying that the vehicle lamp systems are all functioning correctly with the trailer disconnected. - Battery junction box (BJB) fuse(s):
- If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
- If the concern is not visually evident, verify the symptom and GO to SYMPTOM CHART .