I'm having a big electrical problem regarding my '93 Chevy Cheyenne 3500.
I accidentally shorted the positive terminal of the alternator while changing out the thermostat. After I changed it out, I turned on the truck to make sure there were no problems. Truck ran fine. The next day when driving, the truck died. Got a jump start from someone, but smoke started coming out of the firewall junction box.
I had alternator tested and it's good. The battery was drained, so I recharged it. Tried to start again. Nothing happens except smoke coming from same area. There are 2 wires on the 2nd terminal from the left . One wire I believe goes straight to the positive terminal of the alternator. The other wire is the problem. It is melting and starting to burn up. This only happens when I try to start the truck. If I turn the ignition switch to the "on" position, The instrument panel needles move. When I disconnect that wire that is burning up, The instrument panel doesn't come on when turning the switch to the "on" position.
Any help would be appreciated.