I've got a '68 deluxe interior with dual horns. Have not worked since I got the car. Previous owner told me it was the relay so I bought a new one. After installing it, the key alarm now works. But, not the horns. So, I tested each directly and found one works and the other doesn't. Nothing at all happens when pressing the horn button on the steering wheel. I've concluded that the issue is somewhere between the steering wheel and the relay, as I would imagine that even with one bad horn, the other would still sound (and I tested the wiring from the relay to the horn already). Nothing obvious wrong with the horn relay wiring to the firewall.

Any thoughts before I remove the steering wheel and inspect the horn button? Am I on the right track? Any common issues?

Thanks!