Our first trip out both marker lights at the top of the front cap of the trailer leaked like crazy into the wardrobes on each side of the front queen bed. We went out in the rain and duct taped the top of the lights and sure enough the water stopped.
Since then, we have caulked the tops of the lights with clear caulk. Don't really know what we will do when the light bulbs need changing except scrape off the caulk, replace the light, and re-caulk.
Proud Mom & Dad
3 Sons + 3 Daughters-in-law
1 Daughter + 1 Son-in-law
1 Grandson, 5 Granddaughters
tent-7yrs, popup-25yrs, hybrid-5yrs, travel trailer-3yrs
now-2016 Flagstaff 5th wheel pulled by F-250 diesel