Entering winter, the weather is getting colder and colder. When driving in the morning and evening, have you ever noticed that the headlights of your car are fogging up? Will it even condense into water droplets?
Car owners who don't know the truth often panic: Is the car light broken?
Siege Lion tells you, don’t worry, this is just a normal phenomenon when using headlights. In this issue, let’s take a look at it and see what it is.
As far as the overall structure of the headlight is concerned, whether the car has ordinary halogen headlights or headlights with xenon or LED light sets, there is a ventilation rubber tube on the back cover. Don't ignore this rubber tube. It is mainly used for heat dissipation. The heat generated by turning on the lights is discharged from this rubber tube. Similarly, moisture can also enter the rubber breather tube, causing fog in the car lights.
Sometimes, the car headlights will not be tightly sealed, causing water to enter. You have to pay attention to this situation and don't ignore it!
As we all know, the importance of car lights for night driving is self-evident, and water intrusion will seriously affect the lighting effect of the headlights.
So, how do we distinguish between water in the car headlights and fogging during use?
Fogging of headlights is mostly due to high air humidity, causing water vapor in the air to condense in the headlights. Fogging of headlights at this time is normal. The cause of fogging is related to the humidity of the air, not caused by car washing, rain, snow, etc.
Generally, there is not much water vapor that condenses when fogging up the headlights. After turning on the headlights for 15 minutes, the water vapor will evaporate and will not remain in the headlights.
Water intrusion into the headlight means that moisture in the air enters the headlight through the breather tube and adheres to the lampshade. As the water vapor gathers, the water droplets flow down the lampshade. This situation is more common in winter, because in winter The temperature difference is large, and cold air can easily adsorb on the hot lampshade and condense into water droplets.
In real life, there are several situations where headlights are prone to water intrusion. Drivers should pay attention to:
The first is vehicle wading. For example, in off-roading, since the engine and exhaust system themselves are relatively large heat sources, rainwater will form a large amount of water vapor. Along the breather pipe, some of the water vapor will enter the headlights.
The second option is car washing. Some car owners like to use high-pressure water guns to flush the engine compartment. After flushing, the accumulated water in the engine compartment is not dealt with in time. After the engine compartment cover is closed, the water vapor cannot be quickly dispersed outside the car, and the water vapor trapped in the engine compartment may Get inside the headlight.
The third method is to disassemble the headlight. A common disassembly of headlights is to refit car lights. When refitting some headlights, you need to use a hot air gun to bake the glue of the headlight shade and then glue it back together after the refit. If the refitting master is not careful, it is easy to cause the lamp cavity to not be sealed. Yes, water will enter when washing the car or on rainy days.
So how should we prevent the headlights from getting wet or fogging up?
There is no need to worry about short-term fogging. The treatment method is relatively simple. Just turn on the headlights and use the heat emitted by the headlights to evaporate the water vapor. If the fog is severe, you can open the sealing cover behind the headlight and turn on the headlight to bake, which can speed up the evaporation of the fog.
To prevent water from entering the headlights and long-term fogging, it is necessary to clean the water in the engine compartment after each car wash. You can wipe it off, or ask the car wash shop to blow it directly with an air pump; seal it when modifying the headlights.
If water accidentally gets in, the best way is to replace the headlight assembly directly. Have you gained knowledge about headlights?
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