Just yesterday my friend was driving my 88 C1500 and it just turned off (while engine was running). I looked into the engine and found that the ground on the battery came off, as i put the cable back to the battery terminal it sparked more than normal and smoked. when i looked at the terminal i saw that it had melted (disformed) the battery terminal. Does anyone know what the problem might be? Any info will help, please and thank you!