What are the reasons for the sudden failure of the Lamando's horn?

[VioletLee]

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.