Possibilities are (in order from most common to uncommon):
Blown fuse
Bad relay
Dead horn
Bad electrical contact
How do you make a trombone sound like a french horn? Put your hand in the bell and play all of the notes wrong. This is coming from a horn player, btw
Vehicles have a horn or a bell to alert people and let them know the vehicle is in the area. The horn is often used to prevent an accident.
Poor ground, or defective horn.
check the horn relay or the horn itself!
In a "Quiet" Hospital Zone.
The slides on a french horn help carry the sound from the mouthpiece to the bell. I know this because i happen to play the french horn.
French horn although some French horns are valved rather than keyed to allow access to the valve with right and left hands
It's so that the player can adjust tone and tuning by placing his/her hand in the bell.
The French horn is a coiled brass wind instrument with a wide bell and a funnel shaped mouth- piece.
A sousaphone is portable. It's bell can be removed by loosening three screws that fasten it to the rest of the horn. The rest of the tubing can then fit around the bell and the entire horn can fit into a small, but heavy case.
french horn
I don't know where the horn is; however, it's likely that there's nothing wrong with the horn itself. I would first look at the fuse; if it's good; try replacing the relay.