The ammeter measures amps not voltage. It will work exactly the same with the 12 volt system.

All you need to do us buy a new correct wiring harness for your truck and install it.


1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed


My Chevy Master 4 Door is on the Road!