Horn Doesn’t Work But Alarm Does

Here are seven reasons why your horn doesn’t work but alarm does, and what you can do about it.

Imagine riding down the road, and your car horn starts honking for no reason. You press all the buttons on the dashboard, but the horn keeps honking. 

What do you do? It can be a very frustrating experience, but thankfully there is a solution. The Alarm in your car will still work even if the horn does not. So if you ever find yourself in this situation, know that you can still use your Alarm to get help.

Horn Doesn't Work But Alarm Does

Causes For Horn Problems

Car horns are a vital part of any vehicle, allowing drivers to signal to others on the road. But if your car horn isn’t working correctly, it can be a significant inconvenience – and even a safety hazard.

So what can cause car horn problems? Here are seven potential causes:

1. A blown fuse

A blown fuse is one of the most common reasons a car horn stops working. If you suspect this is the problem, check your vehicle’s fuse box and replace any blown fuses.

2. Corroded wires

If the wires that connect your car horn to the battery are corroded, they may not be able to carry enough current to operate the horn. It can be difficult to fix yourself, so you may need to take your vehicle to a mechanic.

3. A bad relay

The relay is an electrical switch that controls the flow of current to the horn. If the relay is faulty, it may prevent the current from reaching the horn. Again, this is something you’ll need to have fixed by a professional.

4. A stuck horn button

If your car horn button feels stuck or doesn’t depress properly, this could be causing the problem. The button may need to be replaced, or there could be an issue with the wiring behind it.

5. Loose connections

Another potential cause of car horn problems is loose connections. If the horn wires or terminals that connect the horn to the battery are loose, they may not be able to carry enough current. It is a relatively easy problem to fix – tighten the connections.

6. A faulty horn

In some cases, the car horn itself may be faulty. If this is the case, you’ll need to replace the horn.

7. A problem with your vehicle’s electrical system

If none of the above seem to be the problem, there could be an issue with your vehicle’s electrical system. It will need to be diagnosed and repaired by a professional.

If your car horn isn’t working correctly, it can be a significant inconvenience – and even a safety hazard. So if you’re having car horn problems, check for these seven potential causes.

Horn Doesn't Work But Alarm Does

Troubleshooting Car Horn Problems

1. Examine the fuses:

The first thing you should do while troubleshooting a car horn is to check the fuses. If the fuse for the horn has blown, it will need to be replaced before the horn can work again.

2. Check the horn’s ground:

Another possible reason for a vehicle horn not working is a poor ground connection. You can check this by testing for continuity between the ground terminal on the horn and a good ground point on the vehicle. The ground connection will need to be repaired or replaced if there is no continuity.

3. Inspect the wiring harness:

If the fuse and ground are in good condition, the next step is to inspect the wiring harness for the horn. Look for any signs of damage or wear and tear; if any are found, the broken wires will need to be repaired or replaced.

4. Examine the Horn Relay:

Another possible cause of a car horn not working is a faulty horn relay. You can check the relay by testing for continuity between the terminals while pressing the horn button. If there is no continuity, you will need to replace the relay.

5. A clock spring that doesn’t work:

If your car has an airbag, then it likely has a clock spring that powers the airbag and the horn. If this clock spring fails, neither the airbag nor the horn will work.

6. Test the voltage at the horn:

If you have checked all of the above and the car horn still isn’t working, then the next step is to test the voltage at the horn. You can do this with a voltmeter, and the problem is likely with the car’s electrical system if there is no voltage present.

7. Directly feed the Horn system:

If you have ruled out all other possible causes and the car horn isn’t working, you may need to directly feed the horn system with power from another source. A qualified mechanic or electrician should only do this.

Horn Doesn't Work But Alarm Does

Frequently Asked Questions

How do I know if my horn relay is bad?

The fuse for your horn is located in the engine compartment. It is usually a black box with a red or white wire running. The fuse will be labeled “HORN” or “HORN FUSE.” A bad horn relay can be easily seen from visual inspection.

Where is the horn switch located?

The horn switch is usually located on the steering wheel. To activate the horn, press the button on the switch. A bad horn switch can also cause the horn to stop working.

Where is the fuse for my horn?

The fuse for your horn is most likely located in the fuse box under the hood of your car. If you cannot find it there, check your car’s owner’s manual for its exact location.

How much does it cost to fix the horn in the car?

Installing a new car horn can be pretty expensive, especially if you hire an experienced mechanic to do the work. The installation price will vary depending on your chosen shop and mechanics rates but expect it to be around $64-$81 more than what was mentioned above at about 134-150 total!


Now you understand the possible causes of the horn problem. You also know how to troubleshoot it. We hope this information was helpful. If you have any questions, please do not hesitate to reach out to us for assistance.

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Sean Mendez

Hi, I am Sean, a self-confessed petrolhead. I live in Boise, Idaho with a busy family of four and our energetic Labrador retriever. Thank you for visiting my website. You can find my email on the contact page.

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