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Old 06-05-2014, 09:32 PM   #1
Join Date: Apr 2014
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Moisture in Clearance Lights

Just checked the roof of my MH and noticed drops of water inside 3 of the 5 clearance lights. The lights are completely sealed...no idea how the moisture got in there.
I'll have to dig out the screw (covered in sealant) and cut the sealant around the lens in order to remove it. Or should I just leave it?

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Old 06-06-2014, 04:19 AM   #2
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I had some of that in a few of mine. Dealer made a few attempts to remove and reseal. It came back but it didn't create any issue for the next five years I owned that coach.


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Old 06-06-2014, 05:29 PM   #3
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Three of my five clearance lights also had moisture inside. I removed all the lenses, cleaned the insides, replaced all the bulbs and re-installed the lenses and sealed them with silicone. No leaks, so far. I figure if water can get into the lights, over time it will corrode the lamp connection. Plus the water could possibly leak into the coach. Fix the leaks while they are minor.
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Old 06-06-2014, 05:43 PM   #4
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It is probably caused by air transfer due to temperature changes. Warm air expands and escapes and after it has cooled of a vacuum develops and outside air gets back in and over time the remaining water just accumulates.

Edit: Good idea to fix it early before something shorts out.
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Old 06-06-2014, 09:08 PM   #5
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I agree, it may develop into something larger. One of my 5ers had this problem, Water accumulated and followed the wiring into the wall and caused a lot of damage. I drilled a 1/16" hole in the bottom of each lens to preven water accumulation again. From then on, every trailer clearance light I've owned has a 1/16" hole in the bottom.
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Old 06-06-2014, 09:20 PM   #6
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thanks for the replies.

I took a closer look today and noticed that the lenses have an opening at the bottom, I would say about 1/2" long and 1/8" high, but it was all covered with sealant.

I assume the opening is for ventilation... I'll open them up tomorrow and see if that will dry them out.

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2002 Volkswagen Beetle on a eze-tow dolly
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lights, moisture

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