I had then same problem with my stereo, tho its all arftermarket, as it was written off I didn't know who the owner was, and it had an amp in it, but took the amp, and left everything in a mess, it was a pain in the ass when I had to pull the headunit out to trace the all the wires going to the cross overs and speakers, took me about a day to get it all running back through the head unit, that was a pain in the ass, now the rca for the sub was replaced without soldering, time to pull out the subfrom the boot and solder it when I got the child restraints installed johns mate ( the other guy working at Trojan) broke my rear speaker connecters, some alpine r series f**ked... yet to mount them somewhere other then the parcel shelf, or somewhere on it keeping the restraints, any ideas ?