I have a 90 Mustang LX that I converted to a 5.0. Horn does not work since I started driving it a year ago. When I press the horn button I can hear and feel the horn relay click but no sound. Also, when I push the horn button the orange parking lights flash. The previous owner had an alarm which I removed. I have also plugged and unplugged horns to clean connections. Anybody have any ideas? Here in MI need a horn because of all the crazy drivers.