Anyone have a diagram for the rear speakers/amplifier setup? I am using a scosche wiring harness for an 86+ VW; two of the three original harnesses plug into it. The third, I'm sure contains wiring for the instrument cluster display, and it must also house the speaker wires and supply wiring for the factory amp. I don't particularly want to rewire the speakers up to the head unit, so I was hoping someone might be able to help.

By the way... this is not a Bose unit. The front speakers work, but the rears are amplified and do not work.

Thanks in advance!

EDIT: There are numerous amplifier integration harnesses available for the Bose system; but wagons didn't have Bose. I think they called it "duo" sound or something along those lines.