Horn started blowing continually.

You could do one thing to check if it is indeed the relay or the horn switch itself first, find and remove your horn fuse. It should be fuse #3 15amp blue on the drivers side fuse panel. When removing it you should be able to hear the relay click on and off when you try to put it back, it is actually found right behind these fuses on the inside of the kick panel. This is just an easy way to listen for it rather than remove it. If it does indeed click on and off then the problem is within the horn switch, which is a part of the airbag assembly on the steering wheel. If you would like to just disable the horn, in the same way you removed it to replace the clock spring, first disconnect the battery then remove the 8mm bolts on the back of the steering wheel and pull it out just enough to be able to see a single pigtail on the back of it with a red wire leading from it. This is your horn switch connector. With it unplugged the horn from the steering wheel should not work, although the horn for locking the jeep should. I hope this is helpful to you.