It depends why it isn't working. You need to find where the power stops between the horn button to the horn. If power gets to the horn and it doesn't sound, it will probably need a horn.
Take to someone who can fix it
The horn on a 1997 Acura Integra uses one wire. When a horn stops working it is usually due to a bad fuse. To fix the horn replace the fuse labeled HORN.
To fix a non-working horn in a 1999 Mercedes C230, first check the fuse associated with the horn, located in the fuse box; replace it if it's blown. Next, inspect the horn itself for any signs of damage or corrosion, ensuring it's properly connected to the wiring. If the horn and fuse are functional, test the horn switch on the steering wheel for faults. If necessary, consult a professional mechanic for further diagnosis.
Take the animal to the vet. They will fix it.
Replace it.
Either the fuse if blown, the horn is defective, the horn switch is bad, or you have a wiring problem. Also make sure it is solidly grounded.
You should in the UK, as your car will fail the MOT test if your horn does not work.
To fix a Jeep Wrangler horn, first check the fuse related to the horn in the fuse box; replace it if it’s blown. Next, inspect the horn relay and wiring for any damage or loose connections. If the horn still isn’t working, test the horn itself by connecting it directly to a power source. If it doesn’t sound, you may need to replace the horn.
To fix a non-working horn on a 2004 Mazda 3, first check the fuse box for a blown fuse related to the horn and replace it if necessary. If the fuse is intact, inspect the horn itself, which is usually located in the front of the vehicle; ensure it is securely connected and not damaged. Additionally, test the horn switch on the steering wheel for proper function, as it may need repair or replacement. If these steps don't resolve the issue, consider consulting a professional mechanic for further diagnosis.
Make sure the 1989 Chevrolet Cavalier horn fuse is in working condition. Make sure the positive and ground wires on the horn are tight and free of corrosion.
To fix the horn in a Mercedes-Benz ML320, first check the fuse associated with the horn in the fuse box; replace it if it's blown. Next, inspect the horn itself for any physical damage or corrosion in the wiring. If the horn is faulty, it may need to be replaced. Finally, ensure that the steering wheel's horn switch is functioning correctly, as issues there can also prevent the horn from working.
To fix the horn on a 1988 Camaro, check the horn fuse first. Then check the horn relay, wiring, horn, and switch to find the problem.