ITS COMING FROM YOUR ALTERNATOR-YOU CAN BUY WHAT IS CALLED A RADIO CONDENSOR AND WIRE IT UP EITHER TO THE ALTERNATOR OR THE VOLTAGE REGULATOR.
THE CONDENSOR SUPPRESSES THE NOISE SOMEHOW...........
Check all the grounds for your stereo if it is aftermarket. Make sure they are all good. If you posted this under the stereo forums, that is the answer they will give. :biggrin:
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