The Stovebolt Site Forums The Shop Area The Electrical Bay Horn wiring 1939 Chevy (early 40's too?)

The horn button has an "S" wire that completes the ground when the button is pushed. Your mast jacket bushing (may be a bearing in '39) has a copper ring around it that the "S" wire contacts when the button is depressed. In theary the "S" wire will also contact the side of the steering shaft at the same time to complete the circuit. In practice the set up is pretty mickey mouse (at least on my 38) and is kind of hit or miss. The "S" wire is held in place by the same rubber that holds the button. You can get the whole thing at any of the vendors. If by chance you have the accessory "Town & Country" horns you'll need a relay for those. The stock horn that mounts to the manifold is as Stuart advised, not requiring a relay. A lot of folks put an accessory horn button on the side of the steering column and run a wire through the dash to bypass the stock set up. That's how my 38 was. I'm still in the process of getting the stock set up to work "right".