Battery not charging

Asked by GuruTJZV2 Jul 26, 2018 at 10:10 AM about the 2002 Ford F-150 XLT Crew Cab SB

Question type: Maintenance & Repair

Replace alternator and battery on a f 150 and still the
alternator is not charging the battery

1 Answer
26,810

oilyspill answered 5 years ago

Did you check the wiring circuits for battery and generator? If problem with wiring circuits, replacing the battery and generator won't fix it. Use a test light at the generator bat terminal, hot all the time, even with key off. In the diagram, the terminal next to the bat terminal is also hot all the time, check that one as well. The generator needs excite voltage or it won't charge, that involves the charge indicator on the dash, does it work? There could be a problem with a fuse or fusible link? I can only help with testing.

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