Can anyone tell me if these horns are original to the 1939 year Chevy trucks? They were in the truck when I bought it, but I'm not sure if they work. I did wire a horn button to it and gave it power from the battery, but nothing happened.

Did the 1939 trucks have two horn button? There's the center button on the steering wheel, and then there's a column button as well. Not sure if the column button is an aftermarket?

http://www.flickr.com/photos/angji/4621578630/

Thanks,
Angie