sounds like he fried something, but still curious how he was going to run an amp unless he has line out adap. if he has lights but no sound i'm guessing it could be fixed pretty easely, i once fried my outs on an alpine then took it to a local radio shop and got it fixed for under 100.00, or he could go to a junk yard and probably get another just like it for cheaper than fixing that one. must have been the hot wire grounding out on frame as ground wouldn't hurt if making contact with body or frame