There is a horn contact pin the rides against the back of the steering wheel so that when you press the horn it works. Over the years it wears and creates a terrible scratchy squeaky noise when turning the wheel.

I have taken it apart over the years and greased it to get by but its finally worn to the point I cant stand it.
its especially noisy during all of this cold ice storm weather.

I was going to make this simple project a video one day, but I couldn't stand it any long and had it done in less than 15 mins.

The part cannot be obtained on its own. The easiest was to order a new combo unit off amazon and use the part.
You can use the entire new combo switch if you want since its all shiny and new but it does not come with the intermittent wiper function that I do have so I only used the horn pin that I needed.

Bonus for me, the first one I ordered was broken, so Amazon sent me another one and I sent the bad one back, but not before keeping the pin from it so, I basically have an entire combo unit and free extra pin.

If you are new to this, the steering nut on my truck was a 21 mm, and you loosen it a little and pull and wiggle to get it off.
The horn contact pin is pushed in and twisted to lock. It is kind of "keyed" if you will.

Did not take a lot of pictures as I did it fast and in the cold.