'93 Explorer cuts out
Recently got a "93 Explorer for my 21 yr old. When we checked it out it shut down while idling a few times but always started back up. It didn't do it while on the road just when idling. Well the last few days he said it has been shutting down while on the road. He said the volt meter jumped around a bit. It always starts right back up though. Do I have a simple alternator or battery problem or should I be looking at other things too? This is my first Explorer I need info from someone who may be more experinced and know what I should look for. Thank You.