Hey everyone, I had a question. So here is the thing, I'm completely confused. Ive installed plenty of head units into cars before but I'm having a real difficult time with my 2002 Audi A4. So I think I have the concert system and not the bose, but I'm having trouble installing a Pioneer AVH-4100. So one thing im having a problem with is, I installed the harness and it seems to work alright except my rear speaker and sub don't seem to be working. I'm not quite sure but I have another harness that I have no idea what to do with, it says "Power Amp" or something on it. Second off I'm having a real hard time bracketing this head unit; I got the metra kit but it didn't come with brackets so now i dont know what to do. If anyone has any suggestions or opinions that would greatly appreciated. Thank you again.

 

your back speakers are not working because audi uses a semi-amplified system for the non bose, this means that the rear speakers and sub are ran off of a factroty amp. so if you hook up the blue/white wire from the 4100 to the amp turn on wire of the harness you should be good, as far as mounting it you'll have to buy a pioneer installation kit, which can be found at http://www.fadfusion.com/selection.p...er=20082404893