regulator help/amp gauge bypass

Once again, the great god of most everything has spoken.

If you bypass the ammeter, you can use a voltmeter. If you are REALLY ambitious, you could "rig" and external shunt ammeter, which GM/ Ferd used for years. Some of the Ferds, though, are kinda "numb." That is, they don't deflect very much until a lot of current changes hands.