The left rear pillar speak works, but the right rear pillar speaker and both door speakers are silent. The factory radio seems to work fine. When I change balance settings, moving to the right side gets dead silence and moving to the front gets dead silence. With audio turned up to full volume, the rear speaker that works can be too loud for comfort, so it seems like it is getting plenty of juice.
Question - How do I check to see if the wires from the radio are the problem versus the wires after the radio? (Said differently: Is the connection bad, or is the harness at fault?)
