Hi, I have purchased a connects2 kit for my non Bose Audi A3 2011 I am replacing the chorus with a pioneer double din however on the connects2 harness there is a Blue wire could anyone help as to were it should be connected if it as to....I know if I have  The single fakra Ariel with blue wire this  needs a 12v supply ,just confused as to why I have the lone Blue wire in the connects2 , any help would be appreciated thanks 

 

In the past blue wires were normally a remote wire for amplifiers. I am going to be fitting one myself in a week or so. If you still need this question answering I will comment once fitted as I plan on fitting a sub too.