fl 2008 cascadia city horn relay

If they annoy me enough the get the horn they get the big one ... There's another fuse box under the hood I can't remember if horns there or not I know trailer fuses are , also pop button on steering wheel to verify if wire is hooked up there and at the horn itself as well

 

I can't recall if it was the Century, Columbia, or Cascadia...but Freightliner has put a fuse panel next to the driver's side seatbelt before behind the door jam. Used to use a nickel to turn the big plastic screws and pull the cover off.
I been in so many trucks, I have no idea which model had that though.