Vans horn got stuck after I a hit a bump and stayed on for about 2mins straight I tried smacking the horn on the steering wheel didn't do anytning it went off when I hit another big bump literally two mins later. Parked the car when I got to the store something was burning smelled horrible!!! Popped the hood felt the horn it was hot !! Unplugged the wire going into the horn, still smells horrible like melted plastic

Anyone know what happened and what I should do thanks

 

Either a stuck horn button or the relay is stuck in the on position.