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Q: charging system on 1990 Mercury Cougar

Apprentice 7fcc12909ae64520525213c612d1ef7ee84ad402e611d9a259270b15abea875b
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?
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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
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