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Vr500csbt audio noise high pitched on most radio stations

I have a noise that is present on mmost local stations here in the Dallas/FT.Worth area and is more noticeable as the volumn passes "25" on the volumn scale. Does not matter if truck is running or not as long as key is on . Ihave a Commander XM radio that I ca'nt use because it gets worse when it is turned on. I used a factory connector adapter to wire straight to the connector from the VR3 radio that was purchased from Crutchfield. I am an ASE auto tech. with much experience but have never come across this until now. Thank You, Alan

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First of all what kind of truck is it? Where is it grounded? Is the radio mounted directly to the car's chassis or is it suspended in a dash kit? What other aftermarket products are installed in the truck?
You can test for radiated noise too...turn on the ignition and bring a portable radio into the car, see if it has the same interference.

Posted on Feb 28, 2008

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Posted on Jan 02, 2017

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