The horns themselves ground to the chassis. I ran across someone who thought they had a clock spring problem too, but it turned out the actual horn had the problem. I had both of the horns go out at the same time on my old 1991 Camry. I had to throw parts at it because that was before the Internet was born. Finally tested each horn and just got clicks. I went to the J.C. Whitney site and found some cheap ones that were still working when I donated the car to Goodwill in 2020...still running.
The horn button in the steering wheel completes the ground circuit when you press it. Down the steering shaft there is a bearing that can get rusted and make a poor ground. In my case I found a text write-up on it after days of searching. I took the steering wheel, contacts and clock spring off and sprayed the WD-40 into it and that was all it needed. Rusty WD-40 ran down the shaft and (luckily) onto a rag I had on the floor. Reassembled everything and there's not been a problem since then.
When you said the cruise control stopped working then I strongly suspected the clock spring. It's a ribbon cable and when that goes bad it's usually not just one thing but multiple things breaking.
Glad you're up and running again.
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