Principle of sound

The horn is a kind of electrical energy into sound a conversion device, when the energy of electron to the coil, coil generates a magnetic field interaction energy and the magnet, this interaction caused by paper disk vibration, because the electron energy change, horn coil will exercise forward or to post, so the paper tray will trumpet follow the movement, this action makes the density of the air changes produce sound.

The common faults of Daquan automobile horn

The car horn is a frequently used device, but in time of need, not ringing or strange sounds, is also very inconvenient. Horn chirp is not good reasons are mostly poor contact. Especially around the steering wheel each contact, because use time is too long, so that contact appears bad contact. In the fault check the horn, turn the steering wheel to the left, if there are larger hissing friction sound, mostly contact surface is not smooth. In order to solve this problem, you can put the steering column cover removed, to contact position injection grease. This can reduce the friction sound are hissing, response can also improve the horn. In order to contact a thorough maintenance horn push switch, must turn the steering wheel itself removed, remove the dirt on the contacts, re coated with a layer of grease, conductive so it can greatly improve the contacts, which can safely push the car horn. Check the horn chirp, chirp, if feel is not clear, a weak, mostly contact contact is not good. Repeatedly pressing the horn of a switch, if the speaker sometimes ring, sometimes not ring, mostly by pressing the switch inside the contact point is not good. About to turn the steering wheel, if there are large hissing friction sound, can be related to the contact position injection some grease. If the speaker is completely not ring, probably fuse is burned out, check the relevant fuse. May also be the power line horn has the problem, find the power line of the horn, the connection plug dismounting power line one, check whether there is bad contact. If the horn of croaking depressing, probably is the horn itself is faulty, then just knocked a horn, mostly can be improved.

The horn does not ring causes and Solutions

The horn is a frequent use of the device while driving, if the speaker fails, when the car will be very convenient. Sometimes the horn, the sound is not like mosquitoes called, is very hoarse, even there wasn't a sound. This is what causes?

We first have a look the horn is and how it works. When you press the steering wheel or other position of the horn button, the current from the battery current to the electromagnetic coil for horn relay through the loop, the moving contact switch is closed electromagnetic coil to attract the relay, the current will flow a speaker. The current speaker within the electromagnet to work, so that the vibration of membrane vibration and sound.

According to the author's experience, the failure in many of the speakers, the problem often is the speaker's own fault. Especially some automobile design defects speaker mounting location, in the rain, very easy to cause the horn drenched by rain, causing damage to the speaker. When the speaker does not ring, common failure parts have no more than 3 points, namely the horn itself, horn switch contacts and the horn wiring harness, when fault occurs can refer to the following steps to check.

(1) sometimes do not sound the horn switch, if the speaker is sometimes loud, sometimes does not ring, mostly horn switch contacts within the contact is not good, there is also the speaker itself problem.

(2) a husky voice is due to plug bad contact, especially around the steering wheel all the contacts, the use of frequent, easy to make contact wear.

(3) completely not ring first check to see whether the fuse fuse, and then unplug the speaker plug, measured with a multimeter here in the horn switch are electrically. If there is no electricity, should check the horn and horn relay wiring harness; if there is electricity, is the horn itself, this time also can try to adjust the speaker on the adjusting nut to see whether they can sound, if still don't ring, you need to replace the horn