/forums/images/graemlins/grin.gif This is on a friends truck. Its a newer S-10, whenever you hook the battery back up wether it be the negative cable or the positive cable, there is a pretty big spark/sparks. Not the normal little zz....this is more of a zzzzzzzzcccckkkkkkkrrrrrrrrrakkkkkk. /forums/images/graemlins/thumb.gif What would cause this? He does have a stereo system with a couple amps and a capacitor. Not sure if that makes a difference.