burn it down.jk.i personally would check the part where you welded and make sure no wires are grounding out.usually thats all it does,it usually doesnt split the wire so if its grounding out just put some electrical tape around the exposed wire and it should work.but check around the wires and such where you welded and make sure none of them are burnt or anything like that.thats where i would start and go from there...good luck...