Sometimes the fog in our headlights blocks the light like a lampshade, and the headlights cannot function at all at night, making the entire road look dark and muddy. Friends who have changed their headlights will also find that the new lights that have just recovered also have this problem? Isn't it because of the headlights?
Whether it is a luxury car or an ordinary car, almost all models have been replaced with sealed and seamless headlights. Compared with old-fashioned detachable headlights, its sealing effect is higher, the air inside and outside will not circulate, and water vapor and impurities in the air will never enter, ensuring the service life of the lampshade and bulb. Since the seal is very tight, it's hard to imagine how the fog got inside? In addition to small stones on the highway breaking the bulb and entering it (of course this is very unlikely to happen), water vapor can also break through the headlight's defense in two ways.
Headlight translucent lampshades and reflective lamp holders are generally made of plexiglass and plastic and are integrated through connections so they cannot be disassembled. Some new cars develop foggy headlights soon after leaving the factory. Most of them are unevenly connected and have holes in their gluing. Some will deform due to long-term exposure to sunlight, and there will be gaps at the seams, which will allow water vapor to take advantage of it. If you replace the bulb yourself, you'll find that the bulb mounting hole is the only access to the headlight. If the bulb's sealing cap or seal is damaged, water vapor can easily enter the car. Maybe someone will say that the bulb is under the hood, there is no rain on it, how can it get in through the bulb?
This is easy to understand. When the headlights are turned on, a lot of heat is emitted. After the air inside the lampshade is heated, the pressure inside is slightly higher than outside. At this time, if there is a gap somewhere, the pressure will be released and the air inside the lampshade will become thinner. Once the temperature is off, the pressure inside the headlight will be lower than the outside atmospheric pressure, so it will go through a brief gap, sucking some air back in to make up the balance. If it happens to be rainy or humid, water vapor can easily be sucked into your headlights. The next time you turn on the headlights, most of the air is squeezed out and some water vapor is sucked in. Repeat this process and water vapor will accumulate.
Knowing these problems, we have ways to deal with it once the headlight gets water. It would be best if the headlight wasn't traumatic. We can enhance the sealing effect by replacing the bulb sealing cap or glue. If it is difficult to determine where the seal is not tight, you can use the following method: Choose a dry day, turn on the headlights to dry the fog inside, then turn off the headlights and pour water on the parts you think may be loose, such as the bulb sealing cover. If fog appears in the headlight after a few minutes, it can be concluded that the bulb holder is not sealed and is causing water leakage. Otherwise, there is only an oil problem at the headlight connection. It should be noted that it is best to remove the entire headlight when applying glue, clean the joints of the lampshade, and then glue them after drying.
Well, after seeing this, I believe you also understand the relationship between fog and lights. If this kind of fog is not cleaned up, it will be very dangerous. Driving on rainy days and in the middle of the night will definitely bring danger, so go and take a look at your own Does the car have this kind of problem?
