I'm in need of help!

I'm in need of help!

Hey guys,

i'm in need of help, i was installing Hella air horns in my car. I set up like they have in there diagram. I tried to trouble shoot and found out the relay wasnt send power to the compressor. So i just connected the regular power cable (that goes to stock horn) and connected it to the compressor. that worked, but then i cleaned everything up and the shit stopped working.
I checked it with tester i wasnt getting any power now. I was looking for fuse for horn but i couldnt find it! Does anyone know where it is, and what kind of fuse is it? I will post a pic of the diagram. By the way i have a 98 corolla CE.

oh sorry if this is the wrong place to put it. this was the closest thing to electrical.

here is the diagram