Basically you build the whole circut on the bench, then each gauge can be fine tuned with the trim adjustments on the back of the gauge...

10 Ohms = High reading
73 Ohms = Low reading

OK I kinda understand with an Ohm meter, but how do i do this and what should the reading be? Are they the same for each type gauge?

1971 Sassy Grass Green Duster 340
2006 Charger Daytona GoMango