Gauges are information devices; the Pantera wiring routs 100% of the alternator output thru the ammeter gauge. Which, in a 60 degree swing gauge, causes the needle to move wildly with small changes in rpm, alt. outputs and other things and tells one nothing beyond that the alternator has an output. Many owners slightly modify their wiring by connecting a 'shunt' directly across the amp gauge terminals while leaving all the stock wiring in place. This provides a parallel electrical path so needle swings are far smaller and more controlled. Output amperage is directly proportional to the surface area of the shunt vs the stock wiring. My shunt is a 3/8" wide shrink-wrapped strip of brass across the gauge terminals. Functional since 1980.