Rim blow steering wheel

My 71 dart swinger has one. i never even knew what it was till some guy at the gas station asked about it. I said it never had a horn. (no horn button) The guy reached in and brabbed the wheel and we hear the relay click. (the wire had fallen off.) hooked up the wire and walla i got a horn. like was said, it dont work wheen i want and you gotta get used to holding the wheel to not make it blow while turning.