Wrecker horn exception handling solution

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   Speaker is a device frequently used when driving, if the speaker fails when driving will be very convenient. Sometimes honked the horn, the sound is not like a mosquito called, it is a very hoarse, even the slightest noise. This is what causes it?
(Wrecker manufacturer) tells you: Let's look at how the speaker works. When you press the horn button on the steering wheel or other locations, the current from the battery flows through the solenoid coil loop horn relay and solenoid attract relay movable contact switch is closed,
Current will flow at the horn. Current job electromagnet inside the horn so that the diaphragm vibration sound.
According to experience, in many failures related to the speaker, the speaker itself, the failure is often a problem occurs. Particularly flawed speaker installation location of some design, when it is raining very easy to make rain water speakers, causing damage to the speaker. When the speaker does not ring, no more than a common fault location has 3 points, or horn itself, horn switch contacts and the horn wiring harness, when a fault occurs can refer to the following steps to check.
A completely does not ring. First check to see if the fuse is blown, then unplug the speaker plug, measured with a multimeter where there is power at the horn switch. If there is no power, check the horn and horn relay harness; if there is electricity, it is the speaker itself is the problem, then you can try to adjust the adjusting nut on the horn to see if sound, if still does not ring, you need to replace the speaker.
Second, sometimes it does not ring. Horn switch, if sometimes loud horn, and sometimes does not ring, and more contact with the horn switch contact is not good inside, some also speaker itself.
Third, hoarseness. Mostly due to the plug connection is bad, especially the various contacts around the steering wheel due to frequent use, easy to make contact wear.
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