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Old 01-29-2006, 01:43 AM   #4
Justin e36
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Join Date: May 2003
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Hiya Lug,

I could be wrong here, it's tough for me to see in the picture---but I believe that wire is for the auto-dimmer / headlight switch. When your headlights turn on, the stereo should auto-dim. Not all aftermarket stereos have this feature though. If you're not using the wire, don't forget to tape it up.
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