If the power cord of the stereo is normal, so are the speakers and speakers, indicating that there is something wrong with the audio host. You can find speakers directly connected to the back of the host. If there is no sound, the main engine is broken. Jeep Grand Cherokee is a classic model launched by Chrysler, which inherits the pure bloodline of Jeep brand and creates a high-end off-road vehicle market.

Car horn is a device that is often used when driving. If there are problems such as single tone, poor sound quality, ups and downs, and sometimes no sound at all, it will bring a lot of inconvenience to the owner. It is necessary to distinguish between the circuit fault and the speaker itself.

The failure of the horn itself is mainly due to the following reasons:

1. Contact ablation: Pressing the horn for a long time is likely to cause contact ablation of the horn, resulting in impedance. The current flowing through the electromagnetic coil is weakened, and the decrease of electromagnetic attraction can't attract the armature to drive the diaphragm to vibrate normally, which leads to hoarseness or even silence. But when you keep honking the horn, if the instantaneous strong current can still work normally through the impedance, it will be good and bad.

2. Poor sealing and easy to get wet: Although the interior of the horn is sealed, if there is water vapor or air in the vacant room when washing the car, the water vapor can easily cause the contact to get wet and cannot work normally.

3. Poor contact of electromagnetic coil terminals: The enameled wire terminal joints of electromagnetic coils in some horns are pressed by aluminum rivets, and the welding is not firm. If the insulating paint on the end enameled wire is not handled properly or the rivet is unreliable, it is easy to cause the wrong connection fault and lead to the poor operation of the horn. This fault is the quality problem of the horn, which can't be repaired and can only be replaced with a new one.

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