Rainy Season Headlight Maintenance Guide

The biggest threat to truck lights during the rainy season is water ingress.

There is a vent rubber tube on the rear cover of the headlight, which is used to discharge the heat generated by the headlight as much as possible during use to maintain the normal use of the headlight. It is because of this vent tube that moisture in the external air enters the headlight through it.

During the rainy season, when the headlights are turned off, the temperature inside the headlights drops, and the temperature difference between the inside and the outside causes moisture in the air to enter the interior through the rubber tube.

In addition, when the vehicle wades through water, the moisture will form a large amount of water vapor due to the heat generated by the engine and exhaust system, and enter the headlights through the ventilation pipe.

When washing the truck, if you use a high-pressure water gun to flush the engine but do not deal with the accumulated water in the engine compartment in time and start it normally, the water will not be able to dissipate in the closed engine compartment, and water vapor will enter the headlights.

So how do we prevent water from entering the headlights?

1. Regularly check the integrity of your headlights.

2. Avoid using a high-pressure water jet to directly flush the engine compartment to prevent high-velocity water from damaging internal components.

3. After washing your truck, be sure to clean the engine compartment thoroughly.

4. When repairing or replacing bulbs, avoid using inferior bulbs and always have them repaired or replaced at a professional repair shop.

What should you do if water gets into your truck headlights?

1. Check the headlights for leaks, damage to the lampshade, and any loose air ducts.

2. Turn on the headlights for 10-15 minutes to allow the heat to evaporate the fog.

3. If the headlights are heavily fogged or even have accumulated water, take them to a professional repair shop for inspection. 

Daily Lighting Inspection: A truck has different types of lights, such as headlights, turn signals, taillights, fog lights, etc. Be sure to carefully inspect each one; don't neglect them!

Replace bulbs regularly. As consumables, bulbs have a limited lifespan. Generally, if you notice a decrease in brightness after every 50,000 kilometers or about two years, it's best to visit a professional repair shop to check and determine if the bulb needs replacement.

When washing your vehicle, be sure to minimize water from entering the engine compartment. If water does enter the engine compartment, be sure to dry it out. As the engine compartment heats up during driving, the moisture inside will turn into vapor, which can easily flow through the vent pipe from the engine compartment into the headlights, causing damage to the lights.