E46Fanatics - View Single Post - Per amp output noise
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Old 04-24-2013, 05:22 AM   #20
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Join Date: Mar 2013
Location: Hampton
Posts: 98
My Ride: 2004 325 coupe
Originally Posted by ccaudio1 View Post
do you have a volt meter? test your voltage when idling.. then voltage when you rev / when the noise dissappears
At the battery or alternater?
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