Tommy is correct. I see 14 volts on mine when running and about 12.7 when it is shut off. Also check for a loose ground wire. If you have a place you can have your battery load tested drive the car down there and have them put their tester on it. They can test the battery itself, whether the alternator is putting out what is should or if there is another problem. This should be a simple problem to find.
Ron
