Horns are wired as follows. Hot wire to under hood horn + terminal, neg horn terminal to horn "button". That negative wire is a wire coming down thru the column from the mast jacket/bearing which has a metal ring that is touched buy the horn contact. This completes the ground-to-chassis path and honks. It is not a hot wire. Try to reconcile this with whatever your harness says. Also see this:
Schematic Diagram for 1947 (hopefully same as 1946)
"Horn Switch" is whatever button you have, normal or clamped on.
It seems they did not use a relay in 46.