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Old 06-15-2015, 11:40 AM   #1
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Moisture in clearance lights

Was on the ladder yesterday putting Rejex on the front of the Discovery and noticed moisture in all of the clearance lights. Is this normal or are they supposed to be waterproof? We have had a lot of rain lately and I'm worried this may provide a path for water to enter and do damage.
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Old 06-15-2015, 11:41 AM   #2
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I can tell you from experience that cracked and/or leaking clearance lights can definitely provide a path for water. I replaced all of mine, front and rear, a couple of years ago and doing so resolved a nagging leakage problem I had had for several years.
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Old 06-15-2015, 11:55 AM   #3
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Are those are the lights on the top front and top rear of the RV?
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Old 06-15-2015, 12:35 PM   #4
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Yes, the yellow lights on the front roof.
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Old 06-15-2015, 12:41 PM   #5
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Yes, the yellow lights on the front roof.
Sometimes also called the ICC lights.
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Old 06-15-2015, 01:21 PM   #6
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Sounds like I need to take them apart and dry them out. Any suggestions for how to seal them so they will still come apart when it's time to change the bulb?
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Old 06-15-2015, 03:34 PM   #7
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Sounds like I need to take them apart and dry them out. Any suggestions for how to seal them so they will still come apart when it's time to change the bulb?
Mine were cracked so we just replaced them. They're not expensive.
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Old 06-15-2015, 05:30 PM   #8
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I just replaced one of my lenses. I noticed a water mark on the inside of the windshield right below the light. Check the caulking/silicone around the light when you replace the lens. I also put a very thin line of silicone on the lens itself before I put it on.
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Old 06-15-2015, 05:44 PM   #9
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Sounds like I need to take them apart and dry them out. Any suggestions for how to seal them so they will still come apart when it's time to change the bulb?
Depending on the type of clearance light (as thy all can differ just a wee bit), I would remove all of the lenses to let them air out. I would then remove (if applicable) the housing attached to the hull. They will more the likely just be screwed in with self tappers.

Get yourself some marine grade quick set silicone and fill in the wiring hole, re-affix the mount and put a tiny bead around the seam. Then replace the bulbs with LED's (just a recommendation) and as installing the lenses put a small bead of silicone around each and install.
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Old 06-21-2015, 12:38 PM   #10
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Tiffin experienced moisture in clearance lights and issued a fuseable link to keep lights from shorting our and causing a fire. 2 of their coaches caught on fire hence the fix...didn't replace lights just created a fuse so there weren't wires shorting out in the front and rear caps. ??? Why not replace the lights ??? Who knows what they were thinking and took the less costly approach instead of changing lights in the first place.
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