1972 96 horns that do not work. I have ten horns and only one worked. I took one apart and found a simple reason. Points get dirty and simple to repair. Dissamble and remove point bar. Open up, clean with a file, install a small amount of di-electric grease, reassemble. Using a Ohm Meter, adjust the screw till you get a closed signal through the spade lug connectors and turn 1 more turn. Using two jump wires give the horn a constant power, adjust the screw till you get maxium volume. Paint and install. These horns are very loud when working properly. With both the low and high horn, people know you are there. Sounds stock!