Q: Horn independently honks; fuse disengaged

asked by on

My horn will independently just start honking. At first, the problem was intermittent, but now it has progressed into a continual problem. It happens whether I am driving or stationary. So, we had to disengage the fuse for the horn. I haven’t taken it to an auto repair shop and I’m wondering if this is something that I can fix myself. What should I do to fix this?

A: Hello. We will be happy to assist you. I be...

Hello. We will be happy to assist you. I believe a faulty horn switch or horn relay to be the problem. Your horn is likely original. Inside of the horn, the horn contact switches expand and contract due to temperature changes and the horn switch may develop shorts which cause the horn to sound randomly.

A faulty relay can be subject to the same expanding and contracting circumstances. A technician could check your relay with the relay tester. One way to check a relay without a relay tester is to try to switch one relay of the same size with another and see if the horn condition changes. The horn switch itself could be tested with a multimeter.

If you don't have access to the tools to test relay and the horn switch please keep in mind YourMechanic dispatches technicians which perform these test.

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・Save up to 30%

Get a quote

What others are asking

Q: A/c blowing cold air intermittently with warm air

Hello. If the system continually blows hot and then cold, this is typically caused by a failing blend door actuator. If it fails, it can allow the temperature door to not hold the right position. It can also be caused...

Q: Car seats won't move; is it due to fuses or relay?

Hello. If the seat functions stopped all of a sudden then you either have a blown fuse or a bad circuit breaker. Both are common issues, especially if something is failing in the seat. I would usually check the fuses...

Q: Car horn honking by itself

Your clock spring is likely faulty and shorting. The clock spring is the device between the steering wheel, and steering column. It allows you to control the functions of the steering wheel, and turn the steering wheel, while holding all...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.