Horn does not work

First, take a look at picture 1 and check the things in the order I indicated. Here are a few links you may find helpful:

https://www.2carpros.com/articles/how-a-car-fuse-works

https://www.2carpros.com/articles/how-to-check-a-car-fuse

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

https://www.2carpros.com/articles/how-to-use-a-voltmeter

https://www.2carpros.com/articles/how-to-check-wiring

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

___________________________

If everything checks good, then you need to follow a diagnostic flow chart. I attached all of the directions below. One of the things is suggests first is to check for diagnostic trouble codes. I don't know what kind or if you have a scanner. This will require one that is a bit more complex.

Regardless, do this and let me know what you find or if you have other questions.

Take care,
Joe