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      10-05-2012, 01:17 PM   #3
VP Electricity
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Drives: F34 xDrive
Join Date: Jan 2008
Location: portland oregon

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So what you're saying is, when the brake pedal is pressed OR when the C/C applies the brakes, and various things happen (most notably the brake lights come on), it affects your left channel?

I would start swapping L and R channels at various places in the signal chain and see when it moves and when it doesn't. I suspect you will find it to be some induced noise associated with the brake lights.
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