How to Solve the Zizzing Sound of Car Horn?
2 Answers
Solutions for the zizzing sound of car horn: 1. If the issue is in the wiring connection part, it is necessary to enhance the shielding of the audio lines, including replacing the speaker wires. Moreover, the routing of the lines should avoid interference sources; otherwise, there will still be noticeable current noise. 2. If the amplifier equipment is faulty, locate the loose connection and secure it properly. 3. If the zizzing sound of the horn increases with the throttle, the input signal line of the amplifier should use shielded cable, and the cable's mesh layer should be grounded. The power wiring of the amplifier should be connected from the back to the front, and the power should not be connected at the input end.
My car horn also made a buzzing sound once, which was caused by oxidized contact points. You can check the horn button on the steering wheel, as dust accumulation there often causes abnormal noises. Simply cleaning the plugs and contacts with a cotton swab dipped in alcohol can solve most issues. If the sound persists, it might be due to the horn's diaphragm getting stuck or a coil malfunction. You can try removing the front plastic cover yourself to check if the horn relay and wiring are loose. Voltage instability can also cause buzzing, so test the battery voltage to ensure it's above 12V. Don’t overlook safety—a malfunctioning horn can be dangerous in emergencies. If it can’t be fixed, just replace the horn; brand-name parts online cost only around 100 yuan. Regular maintenance of the button area can prevent this problem.
