I'm sure there's a thread I've missed but I tried to find one first I promise. So I have acquired my late grandfather's 1962 f100 4wd factory short bed flat bed 292 y block. It's manual everything, and when I got it there was an old mercury 17" steering wheel in there that was a multi material unit. It was made of hard black plastic, metal, then this funky clear suspended bubbles inside of plastic in which had shrunk and shattered throughout time. So I removed it and while so I noticed there was nothing there for horn parts besides the end of a wire, that was it!

Some of my issues with finding parts for the steering is that with it being 4wd is that the steering box and steering shaft is all one unit. From the gear box to the nut holding my steering wheel it's one solid unit top to bottom. I have tried looking on LMC, Classic Ind, Denis Carpenter, etc looking for the horn parts but I can't seem to find a good print out or even a list for the 4wd which I know is different. Okay to stop running on and on now my question is dose anyone have the same truck situation and have a list of the parts to help me out or aid me in the direction I can go so I can get my actual truck horn going again? I do currently have on board air and two old-school semi deep tone 29" trumpets under the hood, one on top each fender so I'm not without warning noise by far.

 

Welcome aboard.

Technically, Ford didn't make a short wheelbase/short bed 4x4 until 1966 in the F100 series only, but that was 115" (with a 129" long wheelbase for 1966 F100 4x4) and all the other long wheelbase 4x4 were 120" wheelbase - so only 5" different. I have two 1966 F250 4x4 that are both 120". Use the same horn and steering wheel as yours.

To make the stock horn setup work in your truck you will likely need to use an original style 18" 4-spoke steering wheel. Do you have one of those already? Two on eBay at the links below - one much nicer than the other and less money, too.
The horn button - or horn ring like the ones on eBay - is needed to use the stock horn contact and turn signal switch. The wheels were originally painted black for Standard Cab and white for Custom Cab trucks.

The horn contact and turn signal switch is reproduced now days but I still opt for genuine Ford parts for anything when I can find. I assume since you said only 1 wire under the steering wheel that is the horn wire most likely. If you don't want turn signals it will make your job easier, but I recommend turn signals myself.





1961 1962 1963 1964 1965 1966 Ford Truck DELUXE STEERING WHEEL & HORN RING F100 | eBay
1961 1966 Ford Truck Deluxe STEERING WHEEL w/ HORN RING Original Accessory | eBay



YouTube video of testing the wire from the horn brush (13A831) in the steering wheel to the horn relay in the engine compartment. If that doesn't work, then the horn won't sound. I can give more details on how to set up the meter leads for that test if needed.


Feel free to ask more questions as they arise. As I mentioned I have two trucks with the same setup and also am a Certified Electronic Technician as well.

 

I made up a little cheat sheet of the numbers - if superseded I gave as many of the numbers for a given item as I could find. The turn signal and horn wiring goes down the left outside of the steering column with a clip around the steering column that holds a cover on. You can sort of make it out in the picture above of the truck interior. I can take a better picture of that if you want. Perhaps you already have some of this stuff, but I wanted to document as much as possible here.

C0KF-13305-AP - Turn indicator lever assembly - black ****
C1TF-13341-D/C1TF-13341-K/C2TZ-13341-D - Turn indicator and horn contact plate assembly
C3TZ-13376-A - Turn indicator switch wiring cover
C2TZ-13377-B/C7TZ-13377-A - Turn indicator cover clip

C1TZ-13A805-C/C1TZ-13A805-D - Horn button or C2TZ-13A805-A Horn ring assembly (each is made up of a few individual parts)
C1TZ-13A807-B - Horn button blowing spring or C1TF-13A807-A/C1TZ-13A807-A Horn ring blowing spring
C0AF-13A821-A - Horn blowing brush
C1TF-13A822-A - Horn blowing brush insulator
C1TF-13A832-A/C6TZ-13A832-A - Horn blowing ring contact plate (Not used when equipped with turn indicators 13341)


They also had kits that included the turn signal switch (with horn contact plate) and harness, turn lever, bulbs and small hardware for a dealership/mechanic or owner to add turn signals to a truck that didn't come with them.

More info here on the kits and other details.

Turn signal Switch 2wd vs 4wd? - Ford Truck Enthusiasts Forums