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

1999 PONTIAC BONNEVILLE
137,000 MILES • 3.8L • V6 • 2WD • AUTOMATIC
Avatar
BIGBOI1978
  • MEMBER
  • 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 9:57 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
Advertisement
Avatar
STRAILER
  • CAR REPAIR CONTRIBUTOR
  • 54,189 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 6:57 PM
Advertisement
Avatar
BIGBOI1978
  • MEMBER
  • 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 8:50 AM
Avatar
STRAILER
  • CAR REPAIR CONTRIBUTOR
  • 54,189 POSTS
What fixed it if I can ask you please?
Mar 26, 2023 at 12:33 PM