Originally Posted by Jim Michael
Solved. After reading every F150 battery light article I could find it seems they all end up pointing to the alternator. The new Ultima brand alternator was defective. Note this was supposed to have all factory new components. You'd think these got tested before leaving the bench.
Yea, ALL NEW factory components made in China or some 3rd world country you can't even pronounce the name off. That's why I don't like rebuilt alternators or starters (or most other rebuilt stuff for that matter). Only the high dollar stuff has any chance of getting parts that are reasonably equal to OEM. Tested??? I don't think you'd want to see what goes on inside a rebuild shop or see who is doing it either.