Pull it out an look at it. Most of the time you can easily see it is blown. If not check it with an ohm meter.
facts on the African side blow horn
Vuvuzela.
It it either a blown fuse, defective horn, bad ground, or defective horn switch. Check the fuse, if it is blown, replace, if it is good, run a wire to the horn directly from the battery. If the horn blows, suspect a bad horn switch.
You have a loose wire, blown fuse or a faulty horn.
Most likely a blown fuse. But, the horn itself can be defective.
Most likely a blown fuse. Otherwise bad wiring going to the horn or a bad horn.
A car horn Should not be blown when there are people cycling on main roads. car garages, Ring roads as this will teter people from using the roads safely.
Check your car for a bad or blown horn rlay.
check to see if your fuse is blown.
A blown fuse may be the reason a horn is not working in a Chevy van. It could also be caused by a faulty horn relay.
Defective horn, horn switch, or blown fuse. add to that a possble faulty clockspring in the steering column.