Hello All,

I have a 2003 A4 with the bose system. I have been reading the forums and found that I need Metra part number 70-1787, so I ordered it from Autotoys.com I understand that the blue remote wire needs to be connected to my deck. I have the RCA's hooked up as well. All I am trying to do it hook up, the ground, illumination, Red power and Yellow Acc. However, when I plug the harnesses in together I see that 2 of those pins are off and do not connect to the autotoys metra harness.

Has anyone ever had this problem from the harness not touching the right pins?

 

on the factory harness i see a brown wire, that plugs into the ground on the metra.
I see a red/blue wire on the factory that plugs into the yellow on the metra and nothing else lines up.

The remaining factory harness wirecolors aregreen/blue, brown, brown/gray.

I did some research and saw the brown is ground, (there are two solid brown wires on the factory harness, a thin one and a thicker one) The red/blue is for the yellow on the metra, but I cannot find the remianing combinations for the red wire on the metra as I read it is black&blue, but I do not have a black/blue wire on my factory harness. Someone please help.Thank You.

I just bought my Audi a month ago, upgraded from a B5 passat.

 

Go to a car stereo shop and pay to get it connected right. A deck install should only cost you $65 if you dont need any other adapters. And if you ever want to listen to AM you need a special antenna adapter that injects power through the antenna cable to turn the antenna amplifier on.