2. Find the horn fuse. The horn fuse is labeled "HORN" or "HORN RELAY."
3. Check the fuse. If the fuse is blown, replace it with a new fuse of the same amperage.
4. Test the horn. Honk the horn to make sure it is working.
5. If the horn is still not working, check the horn relay. The horn relay is located in the fuse box, near the horn fuse.
6. Replace the horn relay if necessary. If the horn relay is faulty, replace it with a new relay of the same type.
7. Test the horn again. Honk the horn to make sure it is working.
If the horn still does not work after replacing the fuse and the relay, you may need to take your vehicle to a mechanic for further diagnosis.