I have all of the parts ready to install but I need to know how to hookup the wiring part to make everything work like stock. Is there a harness I can splice in?, or does someone have the diagrams to show me what wires I need to change/splice into? I will get it reflashed to a A4.

 

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They build the harness you are looking for. It is correct and very nice. It is priced very reasonably as well.

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