Question about 1997 Pontiac Bonneville

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When ever a try to roll the windows up or down the car wants to die almost like its cutting off the fuel pump. i have a new battery and checked the altinator

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Extra power requirements are causing a drain on your alternator....

can you tell me what you did to verify the alternator is "fine"


Posted on Jun 07, 2010

  • 4 more comments 
  • garywigley78 Jun 07, 2010

    i just took it to autozone and they checked it for me

  • Sean Reisdorf
    Sean Reisdorf Jun 07, 2010

    did you take the alternator or the car itself?

  • garywigley78 Jun 07, 2010

    i just took the alternator because i dont trust the car. sometimes it dont like to start back up when it dies

  • Sean Reisdorf
    Sean Reisdorf Jun 07, 2010

    then you have just a few possible problems...

    • volt drop of either the battery cable from the alt/bat

    • volt drop of the circuits from the alt/PCM

    • defective PCM
    if you just want to replace parts I'd start with the battery cable from the alternator to the battery


  • garywigley78 Jun 07, 2010

    thank you ill give it a try in the next few days or so and ill get back and let you know how it works

  • Sean Reisdorf
    Sean Reisdorf Jun 07, 2010

    honestly... what you need to do is have the charging system tested professionally

    a place like Sears can do this for under $20
    however, the track record there is limited to who the techs are working
    a lot of Sears stores have a lot of good techs
    others are just a lot of tech school drop outs

    better choice would be a real known good garage but there it will cost $60+

    the reason you should have it tested is because these test(s) will tell you everything you need to know without throwing parts

    could be that the base engine idle is just too low and you have no charging concerns




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