Skip the auto shop - Our mechanics make house calls

Q: Horn fuse keeps blowing

asked by on

My truck horn isn't working. I took them out and wired them straight to the battery and they work. When I checked the fuse it was blown. I changed it 3 times but it keeps blowing almost as soon as I honk the horn, with no sound coming out. As far as I can tell there's no relay for the horn.

A: Without knowing the model, make, and year o...

Without knowing the model, make, and year of your car I cannot check to see if you have a relay or not. However, the horns require about 10 to 15 amps of power to operate on most vehicles and hooking the horn straight to the battery can give them over 200 amps.

If you disconnect both horns and put a good fuse in to check if the fuse blows with them disconnected, then you have another problem with the fuse blowing and not the horns. It’s also possible that you may have another problem like a shorted harness in the steering column and the horn is the first shorted wire. Try the test, if you need help from there have a mechanic come and check the horn system for you.

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

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...