for some unknown reason i was hooking up my amplifier and since i didn't have RCA outputs on the stock headuint i just splice wires from the rear speakers and ran them to the amplifier inputs. since then i've lost all sound except in the front driverside door. when that happened i disconnect everything on the amplifier and i still dont have sound. so i figured that i may have crossed the wires, but i've crossed wires numerous times in the past, and all i had to do was disconnect the wires and everything was fine again. can anybody tell me what happened, and if i need to replace my HU?