2001 f150 has new alternator & battrey but wont charge battery light stays on will go off at 3500 rpm

Asked by Aug 06, 2017 at 02:51 PM about the 2001 Ford F-150 XLT LB

Question type: Maintenance & Repair

2 Answers

105,355

This system is computer controller, so you will need to take it too someone that knows this system that can diagnosis it properly, could be anything from a bad ground, to an all out failure in the ECM.

20,015

These trucks are regulated by the pcm, I've seen it happen but as said above I'd get it looked at by a professional before jumping to that. The pcm will need to be programed anyway if that's the case

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