The vehicle does have a horn relay, but it isn't a traditional one. It is an integral relay soldered on a printed circuit board. It isn't replaceable. If it fails, the relay box needs to be replaced.
I attached the horn circuit wiring schematic below so you can see what I'm referring to. PCB stands for the printed circuit board.
The PCB relay box is under the fuse box located under the hood. Now, although it isn't working, there could be other causes. Do you hear a click or anything when you press the horn? I realize you checked fuses, but did you confirm there is power to them? Also, the clock spring needs to be functional for the horn to work. By chance is the airbag light on?
Let me know. Also, you may want to check for power at the fuse.
Here is a link that you may find helpful:
Let me know. Keep in mind, the horns may have lost ground as well. You may want to disconnect them and confirm there is continuity to ground on the black wire. Also, have a helper press the horn while you check for power at the dark green wire.
You may find this link helpful as well:
Let me know what you find.
See pics below.
Images (Click to enlarge)
Tuesday, August 23rd, 2022 AT 8:48 PM