yeah check connections I found the mailman one daytrying to push his car between boxes cause the car died I hooked the battery up and whiel it was pulling acharge i was checking the plugs and the one wire on the back of the alt was loose ( they had replaced it the week before ) and the bolt had backed off. so I tighten it up and suggested he might want ot get some lock tight or a lock nut put on the bolt.. He thanks me every tiem he see me now lol.