Okay, the horn could be the relay for it as it is fed from the same fuse as the hazard lights and they work. So that could be the relay or the horn itself. For the others you can start by using a test light connected to a ground to check the fuses in both junction boxes located under the hood as well as the one behind the drivers kick panel. Make notes about which ones don't have power with the key on if any don't have power. The issue you have has at least three possible failure points. The fuses should help point the way.
https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester - the cheap single bulb ones are fine for this testing.
This shows the fuse testing. I think you will find a few with no power to either side of them, but I hope I'm wrong.
https://www.2carpros.com/articles/how-to-check-a-car-fuse
Mar 17, 2021 at 11:02 AM