I see that in the pic you show there are wires to all three relay terminals. As Bill says. One of those terminals has two wires, one for each horn. I believe your answer to my previous question is: "There is only one terminal on each horn".
So to continue......another terminal on the relay is for battery hot. The third is for the column wire you asked about.

Those wires shown should be replaced. They are old and fraying. Mark down/make a drawing where each wire goes before replacing them.
Disconnect the negative battery cable while working on electrical.
The wires I see indicate that a new harness is probably a good idea.

You can test your horns right now to be sure they work. Arrange a jumper wire from battery positive post to the terminal on the horn trumpet. One horn at a time. Just tap the jumper wire end on the terminal. Tap tap........beep beep

Last edited by bartamos; 10/01/2024 12:13 AM. Reason: clarification
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