'96 base with JBL. Front speakers work fine and actually sound decent. Nothing whatsoever coming from the rear. CD changer doesn't work either. I'd like to upgrade the HU to something with an auxiliary input but I'm not interested in a full on rewire. I'd like to think I could score a stock amp if mine is indeed fried and go with a HU that will function properly with the stock amps. Am I thinking wishfully here or is this possible?