Finding the source of a roof leak can be a daunting task sometimes. First suspect is the seal around roof and tank vents. Next suspect is the edge seams. Depending on how the RV is sitting (level) water may enter and run for a bit before coming through a ceiling joint.
I hope when you said you caulked the roof, you meant you sealed with a sealant like Dicor or sikaflex. I would start taking any covers off that you can like vent covers and if the fridge vent is in the area, that too.
Inspect the entire roof front to back and pay special attention to the corners and the front cap seam. ANY gaps in sealant can and will allow water. Check the A/C to be sure its pulled tight, it has a foam seal that is compressed with 4 long bolts and over time they can loosen or the seal can deteriorate. Good luck, take your time and you'll find it.
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2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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