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Battery icon light comes on and off

Tiny
DOUGB863
  • MEMBER
  • 2007 LINCOLN NAVIGATOR
  • 4.6L
  • V8
  • 160,000 MILES
The car listed above came in with a noisy alternator. After replacing the alternator the battery light came on, so we checked the battery recharged it and even replaced it. But as the motor motors running the light comes on and off.
Wednesday, November 13th, 2019 AT 6:32 PM

1 Reply

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Okay, we need to test the alternator. I imagine the alternator has a faulty voltage regulator so if this happened after the replacement then your only option is to replace it again as this has an internal regulator and is not service separate.

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

Let me know what happens. Thanks
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Thursday, November 14th, 2019 AT 5:22 PM

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