charging system on 1990 Mercury Cougar

My volt meter sometimes is reading to high and then it goes back to normal.Can this be caused by a loose connection or bad wiring?or bad cells in the battery?

Asked by for the 1990 Mercury Cougar
1 answer 1 comment
yes it can. get a battery check from a shop and they will also test the alternator to verify the regulator is working as well.

Roy
thanks