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Steve Thomas BMW
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      04-01-2011, 05:22 PM   #1
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Drives: '09 M3 Sedan DCT
Join Date: Dec 2010
Location: Dallas, TX

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Grounding Problem?

I am trying to use an AV/charging cable to connect my iphone and multimedia interface kit. When the USB charging cable is not plugged into a 12V receptacle, the audio and video are fine. But if the USB charger is plugged in, I get a hissing noise on the audio. I've tried 2 different cable and 2 different lighter sockets, but I get the same noise.

Is this a grounding issue or is it a common problem with the iphone 3G?

Last edited by Budge; 04-01-2011 at 05:32 PM.
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