Why do the lights enter the water or fog, we use the process of daily use how to prevent it?

Why do the lights enter the water or fog, we use the process of daily use how to prevent it?

From time to time, the headlights of your car will find a layer of fog. Then you need to be aware that it's just fog that's not unusual or leaves a scar on the lamp shade. The former is normal, while the latter may be related to malfunctionors or improper use. So why do the lights enter the water or fog, we use the process of daily use how to prevent it?

The headlights of all vehicles are not completely sealed, but are deliberately designed with breathable holes, which is often referred to as "breathing holes". Why? Because the headlights on the internal temperature is very high, will cause the expansion of internal gas, if completely sealed, will produce pressure, light will lead to the headlight deformation, heavy direct explosion. Therefore, the breathable hole must be designed to maintain the balance of internal and external air pressure. Since there are holes, there is water or fog.

Strictly speaking, the headlights only breath holes are connected to the outside world, and there will be corresponding sealing materials elsewhere. So when the headlights come into the water, first of all to question whether it is through the breathing hole. What causes breathing holes to enter the water? One is wading deeper than the height of the breathing hole, and the other is that improper flushing during car wash causes the breathing hole to enter the water. In addition to breathing holes, other parts of the seal is not strict, it is also possible to enter the water. As for the reasons, there are many, such as cracks in the lampshade after impact, or the installation of the light bulb did not cover the dust cover strictly, or the plug harness is not inserted in place, etc. , may lead to poor sealing.

In addition, the headlight fog to be divided into the situation, does not mean that there must be a fault. For example, in cold and wet season, even if the headlights do not enter the water, but because the headlights when the heat generated will cause the water vapor evaporated, when encountering cold lamp shade will naturally condense water vapor. In this case, the general headlights start for a period of time, and so the lamp cover also becomes hot after the water vapor will naturally disappear. Then think, if the headlights turn on for a long time, the lamp cover is still foggy, it may be caused by the headlights into the water, which is the category of failure

Normal situation, the front of the lights is not afraid of water, but some car owners feel that the engine compartment too dirty also take water, that is a big mistake. This not only may cause headlights to enter the water, but may also damage the vehicle's circuit

Headlights can cause sealing problems if they have been undergone post-service, such as replacing a light bulb. Therefore, when the headlights fail, be sure to go to the regular 4S shop for the corresponding maintenance. The maintenance and maintenance of lamps should also pay attention to, to avoid using strong solvent swabs lamps. This should be done with special care when the headlights are attached to a large number of stubborn stains and cleaned up after long or off-road returns. Some beauty shops to save money, it is likely to spray some non-compliant cleaning agents, may lead to cracks in the lamp, water is inevitable

Finally encounter the vehicle wades into the water to be particularly careful, when the water level is too high must control the speed, to avoid stirring too high water flowers, resulting in the headlights breathing hole into the water