When your horn goes out, the first step is to investigate the cause of the malfunction. Try checking any fuses, wires, and connections related to your car horn and replace any that are broken or loose. If these simple steps don’t work, it might be time to inspect each component individually. An automotive repair shop or mechanic should be able to identify what needs replacing, whether it be the horn itself, a relay, or an air compressor. You may also need to invest in an additional part depending on the type of car you have.