Re: 40 ford wiring help
My factory horn is long gone so I didn't have to deal with this when I rewired mine. But the VanPelt diagram shows the single one that comes out closest to the firewall connects to the horn button wire from the column. The two that come out together go to the horn relay. The horn relay shows two wires in from the harness and two wires out, one to each horn. Hope that helps.
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