DrivingAmericanNow, I got a good laugh on your description. This reminded me of high school.
My sister and I were running late for school. My mustang was getting a new engine installed. So my dad let us borrow his 1976 Dodge Dart. It had a good running 308 block. I'm running thru some traffic and I end up at the front at a stop light. The stop light was in front of the school. As we are waiting there, we are already embarrassed being seen in the car because it was a lime green outside and inside. Before we knew it, the horns came on LOUD! You should've seen the crowd of students turnaround and stare wondering if it was us. My sister couldn't believe it. She was so paranoid that someone had seen her. Yet, she was busting up so hard almost crying in the car that almost led to her taking a piss on the beautiful lime green vinyl in this Dodge. I couldn't help myself either and joined her cracking up.
Anyhow we get to the parking lot with the horn still being horny.
Even after I turned off the car, the horn wouldn't shut down. So I opened the hood, went to the horns and disconnected them. If you run into the same problem again, just do that. My other piece of advice, just take it to the dealer. It should be a free repair.
