MOMO horn button, Help, Horn not working Options

[xperu]

I drive a 74, I installed a MOMO Sport wheel sometime back but never hooked up the horn. I want to make the car street legal, so I need some help.
Currently the horn button is connected to a black wire so that's the long and short of it.
So is there a thread that might help. I looked for a MOMO button connection thread, but no luck. I have a MOMO adaptor of course.
Is there something I need to know or do I have the wrong wire hooked up. Thanks for your help. Mike

[Rob-O]

Before you go running down the rabbit hole of checking all this electrical stuff, realize a few things. The horn pad on the original steering wheel has only one wire going to it. That’s because the way the original horn button worked is the wire coming into the pad was hot. When you pressed the horn button you completed the circuit because there is a metal ring on the back of the steering wheel that made contact with a metal tab that it part of the turn signal/wiper electrical assembly. When you change over to a Momo wheel and Momo horn button, you no longer have something on the back of the steering wheel assembly that is making contact with the metal tab on the turn signal/wiper electrical assembly. In other words, you can’t complete the circuit. So....the back of the Momo horn button has two metal spades for electrical connections. One of those spades (doesn’t matter which) you’ll attach the wire that is part of the 914 horn button circuit (what you called the black wire). The other spade you’ll need to fabricate a short wire, maybe 3-4 inches, that has a female connector on it and the other end is just stripped back of insulation. Loosen the nut that holds the steering wheel onto the steering shaft. Under that nut should be a large wave washer. Slip the stripped back portion of the wire under the large wave washer, then tighten the steering wheel nut back down. Connect the other end of this wire, the one with the female connector, to the second spade on the back of the Momo horn button.

NOW you have a complete circuit when you press the horn button. The power is traveling through the black wire, through the horn button and to the steering shaft, which is grounded to the chassis.