Battery light stays on

Asked by Tchenley Dec 02, 2016 at 10:14 PM about the 2003 Ford F-150 XL SB

Question type: Maintenance & Repair

I recently purchased a 2003 f150 and it
wasnt charging so bench tested alternator
and battery - both are good, cleaned all
connections replaced fusible link but the
thing still is not charging. I have looked for
the mega fuse without luck.
Any ideas would be greatly appreciated

1 Answer
74,390

OJ answered 8 years ago

The PCM may control the charging of the battery by the alternator. If that is the problem it will have to be diagnosed by a person who has the ability to read the outputs and signals generated by the PCM, utilizing a laptop with the correct program to read your particular year, make, and model vehicle.

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