Another idea but requires a hole to be drilled and that is to use a Shop Vac with the exhaust connector drill a hole to stick the hose into. close it up and fill with air pressure..This will in turn Pressurize the trailer then spray water all over it. Leaks found everyone happy. Of course the first idea is easier no drilling required but if your alone this might be a better way.
1976 Newell Classic (Sold)
Home Base: Riverside, CA
If anyone needs my contact info private message me and I will send it to you.