Has anyone fixed a Puch horn that isn't working? The horn body doesn't open to see if anything is wrong inside but, the two connections show less than one ohm with a multimeter so I am assuming it still works. Is there another way to test it? I'm not sure if the problem could be with the horn switch, but I'm not sure how to check that. Does anyone know what else could be the problem? Another problem I am having is that the brake light and head light both work but the tail light doesn't. I've checked and replaced the bulb. What could be wrong? Is the tail light suppose to be on whenever the moped is running? I have a 79 Sears Free Spirit and it runs great despite what I listed.