Why doesn't the car horn sound?

[Butler]

The reasons why a car horn doesn't sound are as follows: 1. Horn damage: If the car's horn has been used for too long, the reason it doesn't sound may be due to damage, in which case it needs to be replaced at a repair shop. 2. Water ingress: If the car's horn gets water inside, especially during car washing, extra attention is needed. Once water enters, drying treatment should be performed. 3. Circuit fault: If there's a short circuit in the car's electrical system, it can also cause the horn not to sound, requiring circuit troubleshooting. 4. Horn contacts: If the horn contacts are not sensitive, it can also lead to the horn not sounding, necessitating corresponding adjustments.

[LaAxel]

Honestly, it's really frustrating when the car horn suddenly goes mute. Last time I encountered this issue, I found it usually boils down to a few common problems: Most likely, it's a poor contact in the horn button on the steering wheel – older cars tend to accumulate dust or wear out inside the button over time. Another possibility is a blown fuse; just look for the small tab labeled "HORN" in the engine bay or the fuse box near the driver's seat, and replacing it costs just a few bucks. The horn itself could also be faulty – it's usually located near the radiator in the front of the car. You can test it by touching the horn's terminals with a screwdriver to see if it sounds. If there's no response, chances are you'll need a new horn. It's also common for front wiring to degrade or get chewed by rodents, so you might need to check under the car. Oh, and for older cars with a horn relay, that little black box could be the culprit too. If you can't figure it out yourself, it's best to take it to a mechanic ASAP – driving without a horn is just too risky.

[LeJoel]

A few days ago, my car horn suddenly stopped working. After struggling for a while, I summarized the experience: the most common issue is a blown fuse. Check the corresponding position in the front fuse box as per the manual, pull it out, and see if the metal wire inside is broken. Poor contact in the horn button pad on the steering wheel is also particularly annoying—you'll need to remove the steering wheel cover to clean the contacts. The aging of the two horns in the front is the most common problem, especially for vehicles frequently driven on construction sites, as mud and water splashing on them can easily cause rust and damage. Wiring issues are more complicated; you need to check if there’s any exposed wiring from the steering wheel to the engine compartment. For cars with added anti-theft devices, pay special attention to loose wiring connections. Nowadays, with some new cars, you also need to watch out for issues with the body control module—this can only be diagnosed by reading the fault codes at a 4S shop.

[Bobby]

Don't panic if the horn doesn't work, let's troubleshoot step by step. The buttons on the steering wheel are the most prone to issues—try giving them a firm slap, as sometimes poor contact can be fixed with a good whack. Locate the round horn in the engine bay, usually near the radiator frame, and test it directly by connecting it to the battery's positive and negative terminals. If it works when connected externally, it's likely a wiring issue. Check the horn's plug for looseness, then follow the wiring to see if it's been chewed through or worn out. For modern cars, pay attention to the clock spring—the rotating wire harness under the steering wheel—as damage here can affect both the horn and the airbag. Also, a weak battery can turn the horn's sound into a faint buzz, so consider all factors.