As you might have seen from another thread I am fitting a new Pioneer Da110 into my 2005 audi a3.
I have had some iso wire troubles but now managed to get the right one with bose.
But I have just connected it and the steroe doesn't come on. I did notice of the 3 wires from the car to the stereo (I assume power and earth) there is a skinny brown wire not doing anything.
Cany anypne help?