Not Sure If Your Charging? Posted on May 18, 2012 by Steve Carpenter 18 May Charging system acting up? With the key off, the system should read 12 volts on a voltmeter. Fire up the motor and it should read at least 13 or 14 volts. If it doesn’t, then you have a problem. Comments comments Steve Carpenter Dime Store Tools Don’t Have An Oil Filter Wrench?