How to Replace a Car Horn

Not having a functional car horn is dangerous and can prevent your vehicle from passing state inspection. As such, it is important to understand how a horn assembly works and when it may need to be replaced.

When the horn button (located in the steering wheel pad) is depressed, the horn relay is energized, allowing power to flow to the horn(s). This horn assembly can be tested by supplying power and ground directly to the horn. If the horn barely sounds or does not sound at all, it is defective and should be replaced.

Part 1 of 2: Removing the old the horn assembly

In order to safely and efficiently replace your horn, you will need a couple of basic tools.

Materials Needed

  • New horn assembly
  • Protective gloves
  • Repair manuals (optional); you can buy these through Chilton, or Autozone provides them online for free for certain makes and models
  • Ratchet or wrench
  • Safety glasses

diagram showing where to find the horn assembly

Step 1: Confirm the location of the horn assembly. The horn is generally located on the radiator support or behind the grille of the vehicle.

hand disconnecting the negative battery cable

Step 2: Disconnect the battery. Disconnect the negative battery cable and set it aside.

diagram showing how to remove the electrical connector from the horn

Step 3: Remove the electrical connector. Remove the horn’s electrical connector by pushing down on the tab and sliding it off.

hand removing the fastener

Step 4: Remove the retaining fastener. Remove the horn’s retaining fasteners using a ratchet or wrench.

removing the horn

Step 5: Remove the horn. Once the electrical connector and fasteners have been removed, pull the horn out of the vehicle.

Part 2 of 2: Installing the new horn assembly

hands installing the new horn

Step 1: Mount the new horn. Place the new horn in position.

hands tightening down the fasteners

Step 2: Install the fasteners. Reinstall the fasteners and tighten them down until they are snug.

electrical connector being reinstated

Step 3: Reinstall the electrical connector. Plug the electrical connector into the new horn.

Step 4: Reconnect the battery. Reconnect the negative battery cable and tighten it down.

Your horn should now be ready to honk! If you’d prefer to leave this task to a professional, the certified mechanics at YourMechanic offer expert horn assembly replacement.


Next Step

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Recent Car Horn Replacement reviews

Excellent Rating

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Rating Summary
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4
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78
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James

16 years of experience
39 reviews
James
16 years of experience
Mitsubishi Eclipse V6-3.0L - Horn - San Antonio, Texas
All I can say he did an awesome job. Was very professional I would recommend him to all my friends and family!

Steffon

11 years of experience
30 reviews
Steffon
11 years of experience
Toyota Corolla L4-1.8L - Horn - Windsor Mill, Maryland
Steffon was excellent! He was courteous, knowledgeable, and very personable. He explained what he was doing as he did it and completed the job in an efficient and proficient manner.

Roberto

12 years of experience
304 reviews
Roberto
12 years of experience
Ford Explorer V6-4.0L - Horn - Humble, Texas
Excellent Service from Roberto. A True Gentleman who is truly Professional. Anyone I know who has issues with their vehicle. I always mention Roberto /Your Mechanic. A lot of Companies need to learn from Your Mechanic and their Professional Mechanics. I only trust Your Mechanic.

Patrick

15 years of experience
406 reviews
Patrick
15 years of experience
Nissan Sentra L4-2.0L - Horn - Richmond, Virginia
Patrick Is top notch!..This Is My 2nd time Having Him work on a car (This Time My Daughters ) He Arrived on Time performed the work and waited when a defective part was discovered to allow me to go get it replaced. I'd recommend him strongly!

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