What to Do When the Car Horn Suddenly Keeps Sounding?
2 Answers
Car horn suddenly keeps sounding may be caused by: the horn relay contacts cannot be disconnected normally and remain in long-term contact. Here is some introduction about car horns: 1. The car electric horn consists of an iron core, magnetic coil, contacts, armature, diaphragm, etc. 2. The working principle is: When the driver presses the horn switch, current flows through the contacts to the coil, the coil generates magnetic force to attract the armature, forcing the diaphragm to move. The movement of the armature causes the contacts to disconnect, interrupting the current. The magnetic force of the coil disappears, and the diaphragm, along with the armature, returns to its original position under its own elasticity and the spring plate. The contacts close the circuit again, current flows through the contacts to the coil to generate magnetic force, repeating the above action. This cycle repeats continuously, causing the diaphragm to vibrate constantly, thereby producing sound.
If the car horn suddenly keeps blaring non-stop, I usually find a safe place to pull over immediately, as it's not only extremely annoying but could also drain the battery or draw unwanted attention. First, check if the horn button is stuck—this is the most common cause; try pressing it repeatedly to see if it releases. If that doesn't work, turn off the engine—sometimes this stops it, but the safer approach is to disconnect the battery's negative terminal or pull the horn fuse. Locate the car's fuse box, typically under the dashboard or in the engine bay, and refer to the vehicle manual for the fuse's exact position. If you're unsure, don't force it—avoid risking a short circuit or electric shock; taking it to a professional repair shop is the safest option. Afterwards, have a mechanic inspect for button wear, wiring shorts, or relay issues, and remember that regular maintenance of the horn system is crucial. While it might seem minor, ignoring it can lead to bigger problems down the road.
