Car Horn is Honking by itself, What are the Causes & How to Fix?

Some technology is so essential, so ingrained in daily life, that you simply expect it to work. When something as simple as a car horn fails, which you probably don't think about until you need it, it can quickly turn into a nightmare scenario. And, despite its simplicity, a car horn can break in some ways, including cases where the horn does not work at all and situations where the opposite occurs. In this dreadful "always on" state, unsuspecting drivers may find themselves with a horn that will not stop honking no matter what they do.

How to Stop Your Horn from Honking? 

We're going to cut to the chase right now, assuming that your car horn won't stop honking. Check out the sections below for more information on how car horns work, why they fail, and how to fix them. Here's how to silence your car horn quickly:

1. Find the fuse box.
2. Look under the dash, on the side of the dash that is hidden when the door is closed, or inside your vehicle's glove compartment. Examine the engine compartment around the edges. Some vehicles are equipped with multiple fuse boxes. Consult your owner's manual if you can't find it.
3. Take off the fuse box lid.
4. Look for labels inside the fuse box lid and on the fuse box itself.
5. Locate and disconnect the horn fuse or relay.
6. A small fuse pulling tool is included in many fuse boxes. If you can't remove the fuse by hand, look in your fuse box or fuse box lid for one of these tools.
7. If you remove the correct fuse or relay, your horn will immediately stop honking.
8. Once your horn has stopped honking, you can read the rest of this article for suggestions on how to fix your problem, or carefully drive to a nearby mechanic. Your horn will not work until the problem is resolved and the fuse is replaced.

What Causes a Horn to Keep Honking?

A car horn can honk continuously without driver pressing the horn button due to few different issues. Here are some common reasons: Stuck Horn Button: Sometimes, the horn button on the steering wheel can get stuck due to dirt, debris, or wear and tear. If it's stuck in the "on" position, the horn will continuously sound. Wiring Problems: Electrical issues in the wiring of the horn system can cause continuous honking. This may be due to a short circuit, a damaged wire, or a faulty horn relay. When the electrical connection is disrupted or faulty, it can cause the horn to stay on. Faulty Horn Relay: The horn relay is responsible for controlling the flow of electrical current to the horn. If the relay gets stuck or malfunctions, it can keep the horn engaged, resulting in continuous honking. Alarm System Malfunction: Many modern cars have security and alarm systems that are integrated with the horn. If the alarm system malfunctions or gets triggered accidentally, it can cause the horn to honk continuously. Faulty Horn: Sometimes, the horn itself can be faulty, with its internal components malfunctioning and causing continuous honking. Also Read: How to Eliminate a Browser Hijacker? If you find yourself in a car or truck with a horn that won't stop honking, the most important thing to remember is not to panic. Other drivers and pedestrians may assume you're laying on the horn in a fit of rage, but there's nothing you can do about it. What you should do is pull over as soon as possible and locate the fusebox for safety.

How to Repair a Car Horn Honking by itself:

Once you're not in danger of permanently damaging your hearing, repairing a car horn that won't stop honking is as simple as determining which component failed. Because each vehicle is wired differently, you may need to look up a diagnostic procedure specific to your vehicle. However, determining whether the relay is internally shorted or the horn switch is broken is usually all that is required. If you're lucky, you can perform this type of diagnostic without using any tools at all, but you'll most likely need some basic car diagnostic tools. A multimeter will be the most important tool in your arsenal. However, a test light can also be used to check continuity. In some cases, you might get lucky and find a horn relay that is identical to a relay used in another circuit. In that case, simply swap the presumed-good relay for the horn relay and see if the horn stops honking. If the horn works with the replacement relay, you should be able to simply replace the relay and solve the problem. If you don't have an identical relay for testing, you'll have to test both the horn switch and the relay. If the relay is internally shorted, replacing it will solve the problem. If the switch is in good working order, pressing the horn button or pad inside your vehicle should result in a change in the multimeter reading. Remember that some vehicles combine the horn switch with the airbag module. If your vehicle is set up in this manner, you will need to research the proper procedures or take it to a qualified mechanic. Setting off your airbag by accident can be a costly or even dangerous mistake.