Horn is not working

[Nutro]

Cut those zip ties and un-bundle all of your wiring and see if the brown/white wire was looped back in and taped or something.

 

[Doubeleive]

keep in mind the horn is a "normally open" circuit, the horn button serves as a ground.
the relay is energized at all times, touching the horn button closes the circuit (creates the ground)
so for testing purposes, press the horn button while checking with a meter along the circuit path
so horn button to bcm, bcm to fuse in fuse box, fuse to horn relay. relay to horn, horn to ground.

 

[Samuraj]

look like i have more wires hidden somewhere ...?

 

[Nutro]

I think so. Here is most but not all of mine in my 2020