I installed a new kenwood ddx-8017 head unit in my 2002 a4 and the harness i got from metra to do it came with the pins not lining up with my factory stuff. I did some testing and changed some stuff around and got the unit to power up. But here's the problem now my rear speakers don't work and it randomly shuts off and comes back on sometimes. Im pretty sure some of my wiring is messed up. Anyone know what all the wires on the factory harness are? wiring diagram or something or just tell me what i have to hook to what. Thanks.