Negative side to ground. You can use the outside of the gauge cluster for that if its grounded. Positive to Ignition switch switched power. The nice thing about the voltmeter is you can hook it up to the positive side of anything that is switched on with the ignition.


Deve

1950 Chevy 3100 Deluxe Cab
1950 Chevy 3100 Standard Cab
In the Stovebolt Gallery
The Think Tank
More info and tips at Deve's Technet