Damp/Cool Bathroom Wall 99 Adventurer 35C

[RVLikeIts-99]

New to forum and RVing. Got our new-old RV home and after a week of nonstop rain have discovered some dampness on the inside of the exterior wall between the top of the bathtub and the ceiling. New dicor was applied by the dealer to the roof and no issues appeared at the time of pickup that I could see or feel.

The damp/cool to the touch wall runs about a foot out from the front left corner of the bathroom in that small space above the bath tub.

Is this likely to be skylight issues? I can't feel any dampness on the ceiling to the walls. Or is this somehow a leak from the side wall or roof connection? If it is the latter which I suspect...where do i even look for this leak? Is it likely above or below the gutter? What should I be looking for?

Any insight to this issue would be greatly appreciated.

I apologize for the picture but i didnt have one on hand, found this online and it was the closest I could get. Hope it demonstrates it.

[Arizona]

Its the rooftop part of your skylight. No big deal. If you can get on roof with razor knife, take the screws out and scrape off punk with razorknife. Apply sealant, set down new skylight, and loosely screw down. Winnebago dealership $114

[Ray,IN]

The best way to actually find a water leak is to have an RV repair shop use a SealTech system. When our 5er was a week old, the first rain showed a water leak. The dealer used the SealTech system to locate the entry point, which turned out to be about 20' feet from where we found water inside the trailer. They continued the search and found 3 very small air leaks that were sealed too. The 5er never had a water leak from that day forward, we sold it last spring still without any water leaks.