Disclaimer: I AM wrong, I AM dumb, I CAN NOT spell, and I AM sorry for posting That should cover "most" flames!
I think, the horn works by a single ground wire in the colum, and relay under dash. It has 12v to it at all times and the "switch" povides the ground.
I had a gold necklace, that was haging around my steering colum, wind up getting into the colum where it turns and I had the same prob.
this probably isnt your cause but it sounds like somthing in there shorting out the horn.
If I am correct about the negative wire operation, you can go the the horn with a piece of wire and ground it out to the frame, if it blows oz, the horn itself is good, relays (if you can find it) airnt to $$ but the sound you here tells me somthing in the shaft (only a hot wire) is interfearing w/ the hour spinner thingy. DO your turn sigs work? cruse control? are thier radio controls on the wheel?
taking a colum apart IS NOT for the mecanicaly chalenged!
Repete: Disclaimer: I AM wrong, I AM dumb, I CAN NOT spell, and I AM sorry for posting That should cover "most" flames!