What causes the rear speakers in the 2021 Boyue to have no sound?

[Keegan]

Rear speakers having no sound can be caused by poor sealing leading to moisture exposure, poor contact at the electromagnetic coil terminals, or burnt speaker contacts. Regular maintenance and dust cleaning of the speakers are essential to ensure the normal operation of the car audio system. Poor sealing leading to moisture exposure: Although the interior of the speaker is sealed, if the sealing is not tight, moisture can enter during car washing or water vapor can accumulate in the internal space. This moisture can easily cause the contacts to become damp and fail to function properly. Poor contact at the electromagnetic coil terminals: The electromagnetic coil connections inside the speaker are joined by aluminum rivets rather than being securely welded. If the insulation varnish on the enameled wire ends is not properly treated or the rivets are not firmly crimped, it can easily lead to intermittent contact faults, resulting in poor speaker performance. This type of fault is due to the quality of the speaker and cannot be repaired; the only solution is to replace it with a new one. Burnt contacts: Prolonged use of the horn can cause the contacts to burn and develop resistance. This reduces the current flowing through the electromagnetic coil, weakening the electromagnetic force and preventing it from attracting the armature. As a result, the diaphragm cannot vibrate normally, leading to a hoarse sound or even complete silence. When the horn is pressed continuously, if a strong instantaneous current passes through the resistance, it may still work intermittently, causing the sound to come and go.