Thread: 07 Grand Prix - lights dimmimg/pulsating

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  1. #1 07 Grand Prix - lights dimmimg/pulsating 
    SE Level Member curly's Avatar
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    Hello,
    Question with my 07 Grand Prix. I was driving down the road at all different speeds and my dash lights, radio lights, head lights, tail lights, dome light were all pulsating. Car seemed to run fine. I drove a few miles and turned the car off. Started again drove few more miles and turned off car and started up again. 5 times I'm guessing. Eventually it quit pulsating. This happened 6 months ago also and when I took it to my mechanic they couldn't find anything. It might not happen for another 3 months but I would like to fix the problem. I did replace the alternator before this happened for a different issue not related to this problem. I'm no mechanic so any help would be greatly appreciated. Thanks
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  2. #2 Re: 07 Grand Prix - lights dimmimg/pulsating 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    Your guess is as good as mine.

    There is no way to know what the cause is when this hasn't happened in 6 months or more. The problem has to be present to even begin to do diagnostic work to try and figure out the issue.

    All I can tell you to do is clean and check over all power and ground connections at the engine and battery. Make sure everything is clean and tight.

    SMGPFC Member #1
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  3. #3 Re: 07 Grand Prix - lights dimmimg/pulsating 
    SE Level Member curly's Avatar
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    Lol. Ya that’s what mechanic told me. Kinda of figured didn’t know if anyone might have had this happen to them. Thanks for the reply
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  4. #4 Re: 07 Grand Prix - lights dimmimg/pulsating 
    GTX Level Member wstefan20's Avatar
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    My guess is a faulty ground wire. I'll pull up the schematics and see what I can figure.
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  5. #5 Re: 07 Grand Prix - lights dimmimg/pulsating 
    SE Level Member curly's Avatar
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    Ya I have no clue on schematics and faulty ground wire. Thanks for your input wstefan20
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