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  • The Air Horn Guys

Grover Products Air Horn Repair Guide For All Horns



Grover Air Horns provide a loud and distinctive sound that can stop traffic and make your presence known, whether you are in your personal truck, or you are on the job in a fire engine or a military vehicle. However, like all mechanical systems, after years of use air horns can need repair from time to time. If you're faced with an air horn you need to repair, don't panic! With a few tools and some simple steps, you can get your horn back to working like new in no time.

Here's how to repair your Grover Air Horns:


The first thing to check is the air supply to the horn. If there is no air going to the horn, it won't make a sound. Make sure that the air tank is filled and that there are no leaks in the air supply line. If the air tank is low, fill it to the recommended level. If you suspect a leak in the line, check the connections and repair any cracks or holes in the line.


1. Identify the problem: Before you start repairing your air horn, you need to figure out what's wrong with it. Is the horn producing a weak or low sound? Is it not making any sound at all? Or, are there any visible leaks or cracks in the horn's sound unit? Once you know what the problem is, you'll be able to determine what kind of repair is needed and which parts are necessary,

2. Gather your tools: You'll need a few tools to repair your air horn, including a screwdriver, and pliers. A rubber mallet and a thick piece of cloth will also be helpful if you are repairing an adjustable horn like the Grover #1510 STUTTERTONE Air Horn. Make sure you have all the tools you need before you start the repair process.




3. Remove the horn from the vehicle: (note, this may not be the case if your horns are roof mounted or bumper mounted. To repair the horn, you'll need to remove it from the vehicle. This will give you easier access to the parts you need to fix.

4. Check for leaks: If you've determined that your air horn isn't making any sound, the first thing to check for is leaks. Check all the connections and the horn itself for any cracks or holes. If you find a leak, apply silicone sealant to the affected area. This can be difficult when air lines are run behind the headliner, if this is the case, check the other steps prior to removing the headliner


5. Check your valves! If you have an electric solenoid valve verify that it is not burnt out and if you have a manual valve, make sure there are no leaks or cracks in the unit.

If you have a solenoid valve and a horn button vs. a pull chain, check that the button is not stuck or broken.


6. Replace the diaphragm with a Grover Sound Unit Repair Kit: If the horn is producing a weak, low, or whiney sound, the diaphragm may be damaged from years of use. To fix this, you'll need to unscrew the back plate and remove the old diaphragm and gasket and replace it with a new one. If you have an adjustable air horn, you will need a Grover #1522 Emergency air Horn repair kit or a Grover #1094 Repair Kit for Trucktone or Organtone air horn. If you have an air horn that isn't adjustable you will need a Grover #1681 Repair kit.


7. Clean the horn: Sometimes, the problem with your air horn can be as simple as a dirty horn. Use a clean cloth to wipe down the inside of the horn and remove any dirt or debris that may be blocking the sound. Often in bad weather like snow, rain, or high wind, debris, and water can get into the bell of your horn and prevent the horn from sounding. We highly recommend using Grover weather shields to prevent debris and liquids from building up in your horn.


8. Reinstall the horn: Once you've completed the repairs, it's time to reinstall the horn on your vehicle. Make sure all the connections are tight and secure to prevent leaks.


Once you have completed all of the above steps, it's time to test the horn. Turn on the air supply and press the horn button. If the horn sounds, then the problem has been resolved. If the horn still does not sound, there may be a problem with the electrical wiring or the horn itself. In this case, you may need to consult a professional for further repair. In conclusion, fixing a Grover air horn is a straightforward process that can be done by anyone with basic mechanical skills. By following these steps, you can diagnose and repair common issues, ensuring that your horn sounds loud and clear for many more years to come. It's always important to consult the owner's manual for specific instructions for your particular model of Grover air horn, as different models may have slightly different components or repair processes. If you are not comfortable performing the repairs yourself, it is recommended to seek the assistance of a professional mechanic.

By following these simple steps, you can repair your Grover Air Horns and get them back in working order. If you're not comfortable with performing the repair yourself, consider taking your vehicle to a professional mechanic for assistance. Grover Air Horns are durable and reliable air horns for all kinds of vehicles and equipment but like any mechanical system, they may need repairs from time to time. With a few tools and some simple steps, you can get your air horns


back to new in no time and working for years to come.

If you still have questions or would like a hand through the process, send us an email or give us a call!















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