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Battery light comes on when turning vehicle on

Tiny
SEBASTIANTUDON
  • MEMBER
  • 2007 JEEP GRAND CHEROKEE
  • 6.1L
  • V8
  • 4WD
  • AUTOMATIC
  • 117,077 MILES
When I start my vehicle the red battery light comes on for a few seconds then goes away. Doesn’t come on while driving only when I start the vehicle. Doesn’t seem like it’s the battery because it starts right away, is it a sign my alternator is going bad?
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Monday, January 27th, 2020 AT 5:28 PM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good evening,

Yes, it sounds like the alternator is worn and is taking a little time to build the charge rate to turn out the light.

I would check the battery voltage when you start it and see how long it takes to get to 14 volts.

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

Do the test as in the guide and let me know the voltage.

Roy
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Monday, January 27th, 2020 AT 6:09 PM

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