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I pulled the factory stereo out today and there is another pull that's black the harness what is the little black plug for? The after stereo harness that I found only has the white plug? Thanks for any help
 

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I pulled the factory stereo out today and there is another pull that's black the harness what is the little black plug for? The after stereo harness that I found only has the white plug? Thanks for any help
Factory option you don't have. Nothing to worry about.
 
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