I have a 2000 F150 Lightning, 103,000 miles.
Battery went flat. I charged it and also used jumper cables and it just clicked. I fully charged battery - tightened terminals - same. I think its related to the Ford theft device. When I try to start it most but not all dash lights go off. Thanks 4 help
Did the starter engage at all? If everything electrical woks and the battery is charged, it could be the theft system. I have a friend who has an f-150 that did the same thing. He just bypassed the theft system and it started right up.