[PGSigns]

First thing I do is put volt meter on each of the electrical gauges and see if they are good that way first. On the ammeters I look the coils for signs of heat if they look dark they are not any good. I have a box that supplies 12 volts and a variable resistor that is between the gauge tap and ground that can test the fuel and temp. An adapter and regulator can be used to air check the oil pressure gauge. I run all the speedometers with a drill after servicing and lubing the heads.
Jimmy