Ianmark

My friend bought an 05 Audi A4 Cabriolet that is in dire need of some TLC. I am helping him with the stereo as the aftermarket stereo in there now is only hooked up to power.

I am presuming that the person who tried to install this one either cut the original wiring and couldn't figure our how to put it back together, or this is how they got it. I can't find a wiring diagram that has thee colour wires listed,
The car had Bose speakers, but I do not believe it has an amp. I told my friend to look on the sides of the trunk and he didn't see any place an amp could be.

I am showing the wires that I see and maybe someone can give a little help.

The red/blue I presume is 12V, (I haven't checked yet) and the larger brown I'm guessing is ground, (No, haven't checked yet ). The rest are unknown.

Thank you,



Ian