[jerry w]

You should be able to find a voltmeter that fits the same size hole in your dashboard as the ammeter. It is usually only three wires to connect.

How old is your battery? They do not last forever. MIght be a good investment. A battery charges when the voltage on the dash voltmeter is reading about 14.5 volts or higher. A 12 volt battery actually should read 14 volts when fully charged.

Just for the record:

Voltage = Electro-motive force.

Amperage = quantity of electricity in the form of moving electons (current) this is different than charge (Coulombs)

Wattage = Electrical power. In D.C. applications Watts = Volts X Amps

A.C. applications Watts = amperage squared X Ohms

Regards,