The car horn goes off in the middle of the night if there is a horn wiring issue and it touches the ground. Turns out, that a faulty steering wheel airbag and a bad relay are other culprits that cause this horn issue.
Addressing and solving those issues will stop the car horn from going off randomly. And this guide will help with this by walking you through the troubleshooting steps to fix the horn problem. So, stay in tune with us.
Car Horn Goes Off In The Middle Of The Night [3 Easy Fixes]
Your car horn keeps going off randomly because of bad horn wiring, bad relay, or a faulty steering wheel airbag. Below, we will break everything down.
Note: You can also read how to fix the new Power Steering Pump still hard to turn.
1. Faulty Steering Wheel Airbag
A faulty steering wheel airbag, sometimes, causes the horn of your car to blow up. If the outer plastic covers of the airbag get distorted from heat, the airbag will make contact with the horn (when it cools at night) and cause an electrical short. Consequently, the horn will go off.
Replacing the damaged steering wheel airbag will be the only solution to this problem. And the bad news for you is- it costs you around $1000 to change the airbag.
Keep in mind, that it’s the price of the airbag alone. You should spend more bucks that include the labor cost. If you are mechanically inclined, you can watch this video to learn how to replace the steering wheel airbag:
2. Horn Relay May Expose To Moisture
If the horn relays are exposed to moisture or cold, it will cause the car horn to keep going off. Generally, the horn relays are mounted on the firewall or a fender under the car hood. And the sad news is- this location of the horn relay is prone to take a beating from the weather.
First off, detach the wiring leads to the horn and get your friend to press the horn button while having your ears hear the clicking noise. If it clicks, you should replace the horn relay. Fortunately, it takes only $10 to $15 bucks to get the horn relay. Once you get the replacement part, watch the below tutorial to learn how to replace the horn relay:
Alternatively, you can replace the horn relay professionally. In this case, you need to spend over 100 bucks.
3. Wiring Issue
If replacing the horn relay doesn’t bring any luck for you and the car horn keeps going off randomly, we bet there is a problem with the wiring of the horn. Just take a look at the chafed wires that may sort out on a metal part or a problem in the steering column.
Honestly, it’s challenging to track down the wiring issue. So, the best suggestion we can give you is to call a professional mechanic to solve this problem.
What do you do if your car horn won’t stop?
If your horn won’t stop honking, the horn fuse or the relay is at fault. Just remove the horn fuse or the relay and it will solve the horn issue. If you can’t detect the correct fuse, just remove the main fuse.
How much does it cost to get a car horn fixed?
Generally, it will cost you around $130 to $150 to get a car horn fixed. The part itself requires around $70 and the labor cost will be between $60 to $80.
Why is my car horn randomly beeping?
Your car home will beep randomly if the horn wiring gets exposed and it touches the ground. A bad relay can also cause the car horn to beep.
Throughout this guide, we broke down every culprit that causes the car horn to go off in the middle of the night or randomly. Bad horn wiring or bad relay is the main caveat behind this issue. You can easily replace the bad relay and it will not cost you more than 100 bucks if you install it professionally.
But it will be challenging for you to track down the wiring issues. Regarding this, we highly recommend you call a professional mechanic to fix this issue for you. Good luck!