Nothing!!!! We are just having fun at your expense!
You need to remove the driver air bag. Move the steering wheel all the way up and out. Disconnect the battery. In the back of the steering wheel there are two torx screws holding the airbag in place. Remove then and ently pull the airbag off the steering wheel. REMEMBER, there is a small connector to the airbag. Gently remove it. You will then see all your horn wires and the spring loaded ring. You must have had something come loose or there is a shorted wire. I think the main power wire is BLUE. Play around with it until you get the horn to stop blaring.