Car high brake light.
The general brake light (brake light) is installed on both sides of the car, when the driver steps on the brake pedal, the brake light is lit, and emits a red light to remind the vehicle behind the attention, do not rear-end. The brake light goes out when the driver releases the brake pedal.
The high brake light is also called the third brake light, which is generally installed in the upper part of the rear of the car, so that the rear vehicle can detect the front vehicle early and implement the brake to prevent the rear-end accident. Since the car has left and right brake lights, people are also accustomed to the high brake light installed in the upper part of the car is called the third brake light.
The high brake light is faulty
The high brake light is the auxiliary light of the brake light, which is usually installed at the upper end of the rear of the vehicle to enhance the warning effect of the rear vehicle. When the high brake light fails, this may be caused by several factors, including severe wear of the brake pads, low brake oil level, and oil leakage of the brake system. In some cases, restart after the high brake light failure light on the Audi A4 may go out, which may be due to a temporary failure after the system self-test.
The replacement and inspection of high brake lights is relatively simple and usually involves removing the lampshade, checking whether the bulb and wiring are damaged or loose, and replacing a new bulb or repairing the wiring if necessary. If the high brake light is loose or faulty, it should be checked and repaired in time to avoid affecting driving safety. The failure of the high brake light may not only affect the safety performance of the vehicle, but also may cause the alarm light to turn on to remind the driver to pay attention. Therefore, keeping high brake lights in good working condition is an important part of ensuring driving safety.
High brake light is not on
Reasons for the high level brake light not working can include power problems, broken fuses, faulty body control modules, brake light switch problems, poor wiring, broken bulbs, etc. For example, if the high brake light does not light, it may be because there is no power supply to that light. When checking, you can unplug the high brake light and use the test light to test whether there is power coming. If there is no power supply, it may be necessary to check the fuses, body control modules (BCM), and line connections. If there is no problem with the insurance and wiring, then the BCM may be damaged and a new BCM module needs to be replaced.
In addition, the high brake light of high-end models may not light because the fault code is stored in the car computer module, and the computer module can be reset by power failure or other methods, so that the high brake light can be turned on again. Problems with brake light switches, wiring connections, or the brake light itself are also common causes. If the brake lights on both sides work normally and only the high brake light is not on, the brake light switch may be intact, and the line connection should be checked. When the brake light is not on, the brake light should first be checked, because the brake light is used frequently, the service life of the lamp is relatively short, if the lamp is found damaged, it can be replaced in time to restore the normal work of the brake light.
In summary, the high brake light is not bright for a variety of reasons, involving power supply, electronic components, line connection and the bulb itself and other aspects, need to be detailed inspection and maintenance according to the specific vehicle situation.
Is it normal for high brake lights to have fog
High brake lights in high temperature weather fog is usually a normal phenomenon. This is because the design of the high brake light contains a rubber tube for ventilation and heat removal, which allows moisture in the air to enter the interior of the lamp and adhere to the lampshade, forming a water mist or a small amount of water droplets. This is especially common in winter or during the rainy season. If the fog is not serious, there is usually no need to worry too much, as it may be due to temperature differences or moisture. Owners can turn on the lights for about 10-20 minutes, using the heat emitted by the bulb to slowly disappear the fog. However, if the fog does not disperse or there is water, it may be necessary to check the tightness of the high brake light and promptly go to the 4S shop or maintenance service organization for treatment.
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