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Battery not charging

Tiny
RAYRAY27
  • MEMBER
  • 2001 FORD EXPEDITION
  • 5.4L
  • V8
  • 4WD
  • AUTOMATIC
  • 180,000 MILES
I plugged in a converter one night and now ever since I've had to replace 2 battery's alternator and the battery saver fuse, but battery still isn't charging.
Monday, January 17th, 2022 AT 1:03 PM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

So, what is the alternator output to the battery?
If there is excessive load on the charging system, the alternator will not be able to charge the battery. And that will lead to battery discharge and failure.

https://www.2carpros.com/articles/how-to-check-a-car-alternator

Is the converter still plugged in?
What size is the converter?
If that is drawing too much amp it will not allow the alternator to charge the battery.
It is possible that the alternator is just not powerful enough to handle the extra load.

The factory alternator is rated at 115A.

Let me know a little more information.
Thank you.
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Monday, January 17th, 2022 AT 1:34 PM

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