The horn fuse is in the fuse box under the hood, not inside the cab. It is a large square fuse. Go to this link, http://www.club3g.com/forum/electronics/24422-how-fog-lights-turn-parking-lights-bosch-relay.html the horn fuse is to the direct right to the fog light relay fuse.
in the fuse box
How do you disable the horn on a 2006 Mitsubishi Eclipse?
It must be in the fuse/relay box in the engine compartment next to the driver's side fender.
Check the fuse and horn relay.
you need to replace you horn it is bad
Horns generally can not be repaired but replaced. On a 2001 Mitsubishi Eclipse the horn is located inside the front bumper. To replace it disconnect the mounting bolts and remove it. Replace with a new horn.
Pull the horn fuse - two fuses right of fuse 13.
In a 2003 Mitsubishi Montero Limited, the horn fuse is located in the fuse box under the dashboard on the driver's side. To access it, you may need to remove the cover of the fuse box. Look for a fuse labeled "Horn" or check the diagram on the inside of the fuse box cover for its exact position. If you're having trouble, consult the owner's manual for more detailed information.
I have an 02 and it is located to the left of the brake. Take off the cover and it was the one below the top right fuse(it is a ten amp fuse in mine)
The fuse for the horn on a 1989 Mitsubishi Mighty Max is typically located in the fuse box under the dashboard on the driver's side. You may also find a second fuse box under the hood. Check the fuse diagram on the cover of the fuse box for the specific fuse related to the horn. If the fuse is blown, replacing it should restore functionality to the horn.
The horn fuse on my 2000 Montero Sport is located in the fuse box under the dash, to the left of the steering column. The fuse box cover shows a horn symbol.
Under the hood. Fuse box on the drivers side. Its a 10 amp fuse toward the front. there are also two horn relays close by (in the box).