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70 Posts
Discussion Starter #1
what does it mean if im sittin there idling and when i hit the button to role down the windows it makes all my dash lights and map lights dim pretty bad and when i rev it up they all get brighter including my headlight....is this normal or would it be my battery or alternator...my dodge i had never did this and i have only had this truck about a month and half so i dont know if chevy's normally do this...thanks for anyhelp..
 

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47 Posts
uh that kinda happened on my blazer but it only did it when i rolled them up and held the button for a sec and my serria sometimes does it i wouldn't worry to bad about it
 

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1,500 Posts
alternator is probably going to shit out on you or battery, if not both.
 

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259 Posts
sometimes is not the alternator but the voltage regulator, wich is much cheaper than replacing the alternator.
 
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