Trouble Shooting
WARNING: This page is about a different car, the 2002 Lincoln Navigator, 2002 Ford Expedition, 2001 Lincoln Navigator, and 2001 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
Verify customers complaint by operating multifunction switch, horn or headlight switch. Check for obvious signs of mechanical or electrical damage. Check for blown fuse(s) in battery junction box or central junction box, loose or corroded connectors, or damaged wiring harness. Check for damaged ignition switch or ignition key. Repair or replace components as necessary. If no fault is found, repair by symptom. See SYMPTOM INDEX table under SYSTEM TESTS.