My switch on the 51 does have three terminals. The original instructions for the radio installation call for the radio to be wired to the always hot feed to the switch. I believe this is because the switch wasn't rated to take the ignition, heater and the radio at the same time.


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!