Mike, I will disagree with you on the voltmeter, the voltmeter will give you potential energy as an amp meter only show kinetic energy. You can show a 50 amp charge rate on the amp meter and your alternator can be max'ed out and battery can only have a 10 volt potential. This means you have a dead cell and when you turn your car off it will have a low battery, without a volt meter you don't know. A voltmeter will be tell you if you have a problems far ahead of an amp meter. I have ordered one to replace the amp meter. Next time you look at the 65 Jag XKE, look closely at the amp meter, I think it shows charge to the left.
