Product Detailed Introduction Car horns are devices that are frequently used while driving. If they often produce single tones, poor sound quality, are good or bad, and sometimes do not sound at all during use, it will bring a lot of inconvenience to car owners. So what should you do if your car horn doesn’t sound or makes abnormal noises? How to perform routine maintenance and self-inspection? When the above fault occurs in the speaker, you should first distinguish whether it is a circuit fault or a fault in the speaker itself. Let’s first take a look at how the speaker works. When the horn button on the steering wheel or other location is pressed, the current from the battery will flow through the circuit to the electromagnetic coil of the horn relay. The electromagnetic coil attracts the movable contact switch of the relay to close, and the current will flow to the horn. The current causes the electromagnet inside the speaker to work, causing the diaphragm to vibrate and produce sound. Line faults are mainly caused by virtual connections, such as: loose horn plug terminals, ablated horn relay contacts, poor contact of the horn switch at the steering wheel, etc. But among many speaker failures, the one that causes more problems especially in winter is the failure of the speaker itself. Combined with our usage environment and other factors, the faults of the speaker itself are mainly due to the following reasons: Contact ablation: If the horn is pressed for a long time, it is easy to cause the speaker contacts to ablate and produce impedance. The current flowing through the electromagnetic coil is weakened, and the electromagnetic suction force is weakened. The decline cannot attract the armature to drive the diaphragm to vibrate normally, resulting in hoarse or even no sound. But when you keep honking the horn, if a strong current passes through the impedance for a moment, it will still work normally, so it will go up and down sometimes. If the seal is not tight, it is easy to get damp: Although the inside of the speaker is sealed, if mist enters during car washing or there is water vapor in the air in the internal space, the water vapor can easily cause the contacts to get damp and prevent them from working properly. Poor contact of the electromagnetic coil terminals: Some speakers' internal electromagnetic coil enameled wire terminal joints are connected by aluminum metal rivet crimping, which is not a reliable welding connection. If the insulating paint on the enameled wire at the end is not treated cleanly or the rivet crimping is not firm, it is easy to cause a virtual connection. malfunction, causing the speaker to malfunction. This kind of failure is caused by the quality of the speaker and cannot be repaired. It can only be replaced with new parts. Note: When washing the car, remember to prevent the horn from getting wet. If you find water in the horn, blow it dry with an air gun as soon as possible. Try not to press the horn for a long time. This may easily cause premature ablation of horn contacts and horn failure. Try to seek help from a professional maintenance technician. , do not blindly replace the speakers, which may cause unnecessary waste.
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[Business contact person] Mr. Hu
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