Thread: lights go dim

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  1. #1 lights go dim 
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    i"m thinking alternator, but thought i'd run this by the guru's on here.my lights
    are going dim at high rpms(5,500 +)they will dim enough to to appear reddish
    looking. as soon as i let off throttle the least little bit they're bright again.i can
    run all the lights and heater on high for as long as i want doesn't kill the battery
    .i guess my next thing will be volt meter and check voltage.just did and it's at
    14.3 volts at idle and 3,000 rev.what am i missing? how can i check the volts
    at high rpm's? scanner? engine runs fine.thanks in advance.
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  2. #2 Re: lights go dim 
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    Voltmeter probe the cig lighter plug.
    1997 Red GTP 182000 miles stock
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  3. #3 Re: lights go dim 
    GrandPrix Junkie
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    Belt could be slipping at high rpm's as well. How new is the belt and the tensioner?
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  4. #4 Re: lights go dim 
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    belt was put on christmas day, i thought about tensioner ,but belt seems to be tight. i'll double check fordman77,thanks,jimmy
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