What to Do When Water Enters the Tail Light of a Sedan?
3 Answers
There are several solutions when water enters the tail light of a sedan: 1. If the water ingress is minor, you can turn on the headlights for a while. The heat generated will help the moisture inside evaporate and escape through the vent pipe, causing no significant impact. 2. Use a hairdryer to blow warm air at the tail light for a few minutes to remove the moisture inside. Ensure even heating and avoid concentrating the heat in one spot to prevent damaging the light. 3. If the water ingress is severe, you need to open and remove the light cover to drain the water and let it dry. Finally, check for any cracks or leaks in the headlight.
A while ago, my car's taillight got water inside, and the lens fogged up, which was quite annoying. Upon inspection, I found that the sealant had aged and cracked, leaving a gap. I first removed the light, used a hairdryer to blow warm air for a while to evaporate the moisture. Then, I cleaned off the old sealant residue and applied some new silicone to reseal it. After letting it dry thoroughly for a day, I reinstalled it, and it hasn't leaked since. I recommend you also check the edges of the lens for any gaps or if the cover is loose. Avoid blasting that area with a high-pressure washer when washing your car. If you can't fix it yourself, getting a new seal at a repair shop doesn't cost much—it's way cheaper than dealing with a short circuit that could fry the wiring.
There are several common causes for water ingress in taillights: seal failure, housing damage, or improper installation. When handling this issue, first disconnect the power to prevent short circuits, then carefully remove the light assembly. Use a towel to absorb the moisture and allow it to air dry naturally for a day. Inspect the sealing components: if cracks are found, the entire unit needs replacement; otherwise, reapply sealant and press firmly. DIY repairs may not be reliable, especially since damp wiring can corrode bulbs—it's best to have a professional technician test the seal integrity with specialized equipment. Additionally, water ingress can cause blurred lighting, increasing accident risks in rainy conditions, so prompt resolution is crucial. Don't delay until bulbs burn out or fuses blow.
