After many attempts to use the codes for my radio i gave up. I bought a Sony CD player to replace my RR tape deck. I understand that my 92' RRC has a subwoofer w/ amp(found it in the rear quarterpanel) and also 2 other amps for the door speakers and a CD changer. I cant find these door amps or CD changer. If they are there somewhere I dont think I can hook the powered speaker outs of the new stereo to the corresponding speaker wires without damaging the amps. I really want the whole system to work together as intended with a CD player. I was hoping to find somebody who has undertaken this.