No schematic is needed. All that is inside of the steering column for the horn is the mast jacket bushing with an internal wire. The wire goes down the steering column from the mast jacket bushing and out through a small hole in the steering column above the steering box. The wire then attaches to the wire coming from the horn via a bayonet connector.
By the way, for more responses to your 1932 questions you might want to post in the 1929-32 forum instead of here in the General Discussions forum.
Good luck with your project!
