Car horns sit up front where they're exposed to rain and road chemicals. ... But an inoperative horn can also be caused by a bad horn switch in your steering wheel, a broken “clock spring” under the steering wheel, a bum horn relay, a broken wire or a corroded ground. Here's how to check the most likely suspects.

Is it illegal if your horn doesn't work?

Answer: According to state law, your vehicle must have a horn that's "in good working order and capable of emitting sound audible under normal conditions from a distance of not less than 200 feet. ... If it's not a safety situation, it's illegal to honk the horn on the road.

Does the horn have a fuse?

Horn works using electric power and, just like any other electrics-dependant part, it has a fuse. If the fuse is blown, you'll simply need to replace it.