Shuts off when using the power windows or the rear defrost?

1999 PONTIAC BONNEVILLE
137,000 MILES • 3.8L • V6 • 2WD • AUTOMATIC
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BIGBOI1978
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  • 3 POSTS
My car tries to shut off if I use the power windows or if I turn on the rear defrost.
Mar 23, 2023 at 2:57 PM
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STRAILER
  • ✓Experienced Mechanic
  • 55,104 POSTS
It sounds like you have an alternator that is not working, and the electrical system becomes weak when demand is put on it, do you have a battery light on? Let's check alternator output by following this guide:

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

Please go over this guide and report back.


Mar 24, 2023 at 11:57 AM
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BIGBOI1978
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  • 3 POSTS
There is no battery light on, but I read another one of your articles and I think it's okay now.
Mar 25, 2023 at 1:50 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,104 POSTS
What fixed it if I can ask you please?
Mar 26, 2023 at 5:33 AM
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