What Causes the Weak Sound of Civic's Horn?

[LeAdelyn]

Civic's horn may not sound due to contact erosion. Prolonged pressing of the horn can easily cause the horn contacts to erode, creating impedance. This weakens the current flowing through the electromagnetic coil, reduces the electromagnetic suction, and prevents the armature from driving the diaphragm to vibrate normally, resulting in a hoarse sound or even no sound at all. Poor sealing leading to moisture: Although the horn is internally sealed, if the sealing is not tight, mist can enter during car washing or water vapor can be present in the internal air space. This moisture can easily cause the contacts to get damp and fail to function properly. Poor contact at the electromagnetic coil terminal: In some horns, the enameled wire terminal connections of the internal electromagnetic coil are made with aluminum rivet crimping instead of secure soldering. If the insulation paint on the enameled wire ends is not properly removed or the rivet crimping is not secure, it can easily lead to intermittent contact faults, causing the horn to malfunction. This type of fault is due to the horn's quality and cannot be repaired; only a replacement with a new part is possible.