The main reasons for the horn not ringing or the sound hoarse are insufficient battery storage, damage to the horn relay and button, damage to the horn and so on. details as follows:
1. Check the sound of the horn. If you feel that the sound is not crisp, low and weak, it is mostly due to poor contact.
2. Press the switch of the horn repeatedly. If the horn sounds sometimes and sometimes does not sound, it is mostly because the contacts inside the switch are not in good contact.
3. Turn the steering wheel left and right, if there is a loud "hissing" friction sound, you can spray some grease to the relevant joints.
4. If the horn does not sound at all, first check the fuse to see if it is blown, then unplug the horn, and use a multimeter to measure whether there is electricity when the horn switch is pressed. If there is no electricity, check the horn wiring harness and horn relay; if there is electricity, it is the problem of the horn itself. At this time, you can also try to adjust the adjusting nut on the horn to see if it can make a sound. If it still does not sound, you need to replace the horn.
5. If the sound of the horn is dull, it is likely that the horn itself is faulty. At this time, as long as you knock the horn, most of them can be improved. The joints are all in poor contact, especially the wires around the steering wheel, which are prone to wear and tear due to frequent use.
6. The seal is not tight and it is easy to get damp. Although the interior of the horn is airtight, if the seal is not tight, go to wash the car, it is easy to enter the mist or there is water vapor in the air in the interior space, and the water vapor can easily cause the contacts to be damp and not work properly .
7. The working condition of the horn is related to the working condition of the battery when the car is at low speed. If the energy of the battery decreases, the sound of the horn also decreases. It is necessary to check whether the battery storage capacity is normal.