ok before i get the lecture about disconnecting the battery before welding i know i originally did. but my step son hooked it backed up when he was screwing with his power window of something, and he forgot to disconnect it again. i noticed it after a while of welding and disconnected it. after connecting it back up, the alternator would get warm and start to smoke. figuring maybe we pinched a wire or something reinstall inner fenders, fender, or a door, we checked everything again. well finally hooked the ground back up and it didnt get hot or smoke. in the 4 blocks from my dads garage back home the Battery light came on. could we of had screwed the alternator by welding with it still connected to the battery?? the kid is getting really bummed about this truck, since it seems like when he fixes one thing (new floor pans) something else breaks. truck is a 1990 Jimmy.