Alternator not charging the battery

Tiny
SMOKETELLY
  • MEMBER
  • 1985 LINCOLN CONTINENTAL
  • 103,000 MILES
Replaced the alternator. Had to clock it. Not charging battery. Battery had drained before replacement. Battery charged on battery charger.
Wednesday, May 4th, 2022 AT 2:13 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Hi,

If the new alternator isn't charging, the first thing I recommend is to check the fusible link between the alternator and the battery.

A fusible link, in this case, will look like a traditional wire, but it functions as a fuse. If shorted, it will melt down internally. So here is what to do.

I attached the wiring schematic below for the charging system. I highlighted the fusible link. Disconnect the battery first and then check for continuity between the black wire with an orange tracer and the positive battery terminal (not the battery).

Here is a link that you may find helpful:

https://www.2carpros.com/articles/how-to-check-wiring

Let me know what you find or if you have other questions.

Take care,

Joe

See pic below.
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Wednesday, May 4th, 2022 AT 9:26 PM

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