Hello everyone just jioned in search of HELP wiring the stock Radio back into A4. My son and his friends hacked up harness and I need HELP!!!

The car has the BOSE AMP ? in trunk area mounted to ceiling drivers side there is also a bracket I believe to a CD changer NOT in car . I went to the local junk yard to find harness to splice into. I did the one at AMP No problem Wire to Wire !! I took radio (Delta) and found a harness with plugs at junkyard. I started going wire to wire but I have twisted speaker wires from radio but NONE from car harness behind Dash?????

I do though have a shielded black wire with about 5 colored wire that comes from car harness but not on the radio side ?????? There is green,white ,brown/tan wires in black jacketed shielded wire ?? I connected battery and have power to radio but NO sound


HELP !!!!!!!!!! what re those wires and what did I miss!!!! Any fuses anywhere??????????

I need toget this back to stock system and I need to get rid of car ASAP !!! I cannot find any wiring diagrams on any web sites ? any ideas?