Some technology is so basic, so ingrained in daily life, that you just expect it to work.
Under the hood, look around the edges of the engine compartment.
Some vehicles have multiple fuse boxes.
When your horn won’t stop honking, pushing it again may unstick a bad switch, but that won’t always fix the problem.nubumbim/iStock
If you’re free to’t find yours, consult your owner’s manual.
Remove the fuse box lid.
Examine the interior of the fuse box lid and the fuse box itself for labels.
Locate and remove the horn fuse, or the horn relay.
Many fuse boxes include a small fuse pulling tool.
Your horn will immediately stop honking if you remove the correct fuse or relay.
Your horn will not function until the problem has been fixed and the fuse has been replaced.
How Do Car Horns Work?
In a typical car horn circuit, the switch or button the driver pushes is connected to a relay.
This horn relay will be connected to the horn switch, battery positive, and the horn or horns.
When the driver activates the horn, the relay provides power to the horn.
When one of these components fails safe, the system just doesnt work anymore.
In the latter case, its possible for just one horn in a two-horn pair to stop working.
The issue is that car horns are loud.
The average car horn is about 100-110db, and some are even louder than that.
So if it wont stop honking, what are you supposed to do?
What Causes a Horn to Not Stop Honking?
However, its typically a matter ofdetermining whether the relay is shorted internallyor if the horn switch is broken.
The most important tool in your arsenal will be a multimeter.
If you find that the relay is shorted internally, then replacing it will fix the problem.
it’s possible for you to then use a multimeter to check for continuity between these wires.
Keep in mind that some vehicles integrate the horn switch with theairbag module.
Accidentally setting off your airbag can be a costly,or even dangerous, mistake.
The first thing to check is whether or not the horn relay is getting power.
If it isnt, then youll have to look at the wiring between the relay and the battery.
Youll need to check for power and ground at the horns.
If you find power and ground, you probably just need a new horn or horns.
If there is no power or ground, then its a wiring issue.
Most modern cars are set to honk the horn when the doors are remotely locked by default.
