I upgraded my CDR-24 with a new pioneer AVIC-X920BT. It seemed to be working well with the factory AMP and speakers until I noticed that the subwoofers in the door are not operating. Anyone have any idea how to go about testing the output from the AMP. I would trying to avoid removing the door panels to get to the speakers and do not have a clue on the colors for the wiring harness out of the AMP.
Any help is greatly appreciated.