Q: My car horn goes off randomly

asked by on

i have to keep my horn not hooked up because when it is hooked up it goes off randomly through the night

My car has 151000 miles.
My car has an automatic transmission.

There are a few things along the horn circuit that may cause this type of concern. The horn switch inside the wheel may be shorted and will trip the circuit to sound the horn. There is also a relay in the circuit that may malfunction and cause the horn to sound. Pulling a fuse or relay will stop power to the horn, but may be unsafe if you forget to hook it all back up before driving the vehicle. Consider hiring an experienced technician like one from YourMechanic who can come out for a closer look at the horn and offer a more personal diagnosis.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. My car horn goes off randomly

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Have owned this car for one week. The security alarm activates when I close the trunk if the car is locked. Is this normal?

Hello, thanks for writing in. The alarm will go off when this happens because the alarm module feels you shut the trunk and thinks that the vehicle is being tampered with. It is best to unlock the car first prior...

Q: Horn, radio, interior lights, clock, mirrors, & locks all quit

There is a 20 amp courtesy fuse that is common to all of the electrical systems that you are experiencing problems with. The fuse is in the fuse block and is labeled "CTSY," and if it blows, then it can...

Q: Automatic transmission jerking

Hello. A common cause of transmission hard shifting is dirty transmission fluid. I suggest checking the transmission fluid. However, it is quite likely that the cause of the transmission malfunction is that the transmission module needs reprogramming. There is an...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.