Horn stopped working again!

[83GMC]

Hello,

I'm new hear and to the older trucks. I acquired a Metallic Blue '83 GMC High Sierra Reg-Cab SWB from my Aunt. It needs work, but it's only used for a "Point A to B" vehicle right now. After I got the truck, the horn needed fixing (among some other small things) to get it inspected by the State of Texas. My Uncle bought a dash mount horn button when he had the truck, but never put it in. I thought it would be best to replace the factory one and not cut any holes in the dash or do any new electrical for the new horn. I found Chevy Duty and bought the white plastic contact plate and a new pin and spring. After figuring out how everything went, my Brother and I got the horn to work.

After a month, maybe more of truck uses, the horn stopped working again. I wouldn't think the new parts are broke. I hate to sound lazy, but could anyone please give me an idea to what could be causing the problem before I take the steering wheel apart? That's a lot of parts to go throught to get to the horn contact plate. Would engaging the steering wheel lock everytime I park the truck have anything to do with it?

Thanks for any help or ideas.