What to Do When the Car Horn Suddenly Stops Working?

1 Answers
StAlina
07/30/25 8:39am
Reasons why the car horn suddenly stops working: 1. Contact point erosion: Prolonged pressing of the horn can easily cause the horn contacts to erode, creating a certain level of impedance that weakens the current flowing through the electromagnetic coil (reducing the electromagnetic force). This makes it impossible to attract the armature to drive the diaphragm for normal vibration, resulting in a hoarse sound from the horn or even complete failure. 2. Moisture due to poor sealing: Although most car horns on the market have good sealing, over time, this sealing can degrade. When cleaning the interior, be careful around the horn area to prevent water vapor from entering, as this can cause moisture inside the horn, directly affecting its sound quality or even causing it to stop working entirely. 3. Poor contact at the electromagnetic coil terminal: Some horns have electromagnetic coil terminals connected not by welding but by aluminum rivets. If the insulation varnish on the enameled wire is not properly treated or the rivet connection is loose, poor contact (false connection) can occur, leading to intermittent horn functionality.
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