Question about 1994 Pontiac Bonneville

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Engine stalls when using power windows

1994

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  • jburton581 Jun 04, 2009

    put new alternator on seems to be charging fine.

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  • Master
  • 1,959 Answers

Several things could be at play here:

  • Check the serpentine belt or drive belt around the altenator; if its slick or worn, this would cause slippage and not provide adequate charging to keep the car from stalling. A car should be able to run off the alternator even without a battery.
  • If the belt(s) is fine, have the charging system checked out; most shops and even some autop parts retailers will perform this test free of charge. A bad charging system would cause the car to stall when taxing it by using electrical accessories. Another sign would be to start the car and put the headlights on. Even if the car stays running, you would notice the headlights to be considerably less bright if the charging system is bad.
  • Check for corrosion on the battery cables/posts; a weak battery will give you issues when using the power windows
Hope this answers your problem.
Best of luck.
Greg

Posted on Jun 04, 2009

  • Greg Margossian
    Greg Margossian Jun 04, 2009

    If alternator is fine, then checking the belt and/or battery posts would be the next course of action. There could also be a bare spot on one or both of the battery cables.

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  • Pontiac Master
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Clean and tighten your battery cables.

Posted on Jun 04, 2009

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