Sorry, I was just assuming it was wired correctly since the installation over 6 years ago has worked until just recenlty. It's only the last month that I started having the problem, so I was just assuming it was wired correctly since the beginning. I am to scared to take my dash off and undo the bundles of wires that have been sitting there for years to check what they are running to. I'm sure that it's going to bite me in the ass though. I'll probably wind up with a $250 amp that does the same thing as the one I have now, if it turns out it's wired wrong.