I have a 5 year old travel trailer with a roof leak. I pin point exactly where but know the vacinity. Since there is nothing glaringly obvious and given the vast amount of information out there can ...
Roof warranties are almost useless as the leak is probably at a seam and that's a maintenance item. I'd pressurize the trailer and use soapy water sprayed on any potential leak. Sealtech provides equipment used by some service centers to do this. There are also some DIY threads floating around here.