1. Open the hood of your car.
2. Locate the engine compartment fuse box. It is usually near the battery.
3. Find the horn relay. It is a small, black box with a green or blue connector.
4. Remove the horn relay by gently pulling it out of the socket.
5. Inspect the horn relay for any damage or corrosion. If it is damaged, you will need to replace it.
6. If the horn relay is not damaged, reinsert it into the socket and close the hood of your car.
Here are some additional tips for troubleshooting a horn that will not stop blowing:
* Check the horn switch to make sure that it is not stuck in the "on" position.
* Check the wiring connections to the horn to make sure that they are secure.
* If the horn is still blowing after you have done all of these things, you may need to take your car to a mechanic for further diagnosis.