Car knowledge self-checking horn failure reference steps

Editor's note:car hornIt is a device frequently used when driving. If the horn fails, it will be very inconvenient when driving.

Let's first take a look at how the speaker works.When the horn button on the steering wheel or other positions is pressed, theAccumulatorThe current will flow through the loop to the hornRelayOn the electromagnetic coil, the electromagnetic coil attracts the moving contacts of the relayswitchClosed, the current will flow to the horn. The electric current makes the electromagnet inside the horn work, so that the diaphragm vibrates and produces sound.

In many horn-related failures, when the problem occurs, it is often the failure of the horn itself.Especially somecarThe design of the speaker installation position has defects. When it rains, it is easy to cause the speaker to get wet by rainwater, causing damage to the speaker. When a fault occurs, you can refer to the following steps to check.

Sometimes no sound

Press the horn switch. If the horn sometimes sounds and sometimes does not sound, it is mostly because the contacts inside the horn switch are not in good contact, and some are also the problem of the horn itself.

Hoarseness

It is mostly due to the poor contact of the plug, especially the contacts around the steering wheel, due to frequent use, it is easy to wear out the contacts.

No sound at all

First check the fuse to see if it is blown, then unplug the horn, use a multimeter to measure whether there is electricity when pressing the horn switch.If there is no electricity, check the speakerWire harnessAnd the horn relay; if there is electricity, it is the problem of the horn itself. At this time, you can also try to adjust the adjustment nut on the horn to see if it can sound. If it still does not sound, you need to replace the horn. (Mainstream modified car)