Skip the auto shop - Our mechanics make house calls

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?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Alarm and keyless entry malfunction, G error code

Hey there, thanks for writing in about your 2007 Mercedes Benz E550. The car alarm in many of the later model Mercedes vehicles has it's own set of small batteries. When these batteries go bad, they will automatically set off the...

Q: Headlights, lights, brakes, steering go out & car won't start

Hello there, thanks for writing in about your 1999 Oldsmobile Cutlass. With this type of fault, many different components could potentially be the cause. The most common would be the battery, alternator, ignition switch, a wiring short, or a failing...

Q: Car shaking, squeaking, and clunking

These noises can be caused by a number of different sources. I would need more information, such as where these clunks are coming from and when you are hearing them, to make an accurate diagnosis. I suggest you call the...

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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.