What are the reasons for the sudden failure of the Lamando's horn?
3 Answers
The horn is the audio signal device of a car. The sudden failure of the Lamando's horn may be caused by the following reasons: 1. Contact point erosion: Prolonged pressing of the horn can easily cause the horn's contact points to erode, creating impedance. This weakens the current flowing through the electromagnetic coil, reducing the electromagnetic attraction force, which prevents the armature from driving the diaphragm to vibrate normally, resulting in a hoarse sound or even complete silence. 2. Poor sealing leading to moisture: If the horn is not sealed properly, moisture can enter during car washing, or water vapor can be present in the internal space. This moisture can cause the contact points to become damp and fail to function properly. 3. Poor contact at the electromagnetic coil terminals: In some horns, the terminals of the electromagnetic coil's enameled wire are connected with aluminum metal rivets. If the insulating varnish on the ends of the enameled wire is not properly removed or the rivets are not securely crimped, it can easily lead to a loose connection fault.
When I was driving my Lamando, I encountered a sudden horn failure. After some thought, I decided to start troubleshooting from the basics. The most common cause is a blown fuse. The fuse box is usually located under the steering wheel or in the engine compartment. Open the cover and look for the fuse corresponding to the horn to see if there are any signs of burning. If it's not a fuse issue, then check the horn itself—it might have water damage, accumulated dust, or become loose due to vibration, especially since high temperatures in the engine compartment can easily cause malfunctions. Poor contact in the steering wheel button is another major cause; after a few years of use, the buttons can wear out or get dirty—try pressing harder a few times. If you have a multimeter, it's better to measure the voltage; if not, don’t force it—safety first. The horn is crucial during emergency maneuvers. If it stops working, pull over immediately to check, to avoid causing a rear-end collision. I recommend starting with checking the fuse and the button. If that doesn’t work, take it to a proper repair shop—it won’t cost much but will save you a lot of hassle. Don’t ignore small issues; they can turn into big hazards.
I've dealt with similar horn malfunction issues before, and I suspect the problem might lie in the wiring. A blown fuse is often the primary culprit—try replacing it with a new one to test for quick resolution. If that doesn't work, inspect the wire connections for any looseness, wear, or corrosion, particularly in areas like the undercarriage and engine compartment, where prolonged exposure can lead to wire aging or rodent damage causing open circuits. The relay could also be faulty—if the contact points on that small control switch component oxidize or get damaged, it's game over. In the Lamando model, the compact design makes heat buildup more likely. Additionally, check if the battery voltage is sufficient, as low power can affect the entire vehicle's electrical system. Driving without a functioning horn is risky since you can't alert others when overtaking. I've found that promptly checking the wiring helps prevent accidents, but if you're not familiar with electrical work, it's best to seek professional assistance. Preventive measures include regular inspections of the battery and connection points—mention it during routine car maintenance.
