Discovered a leak, where is it coming from?

[92DakotaHD]

My floor cracked a few winters back. Decided to fix it and pulling the old linoleum I found a leak in the back corner I wasn't aware of. It's wet even with the trailer sitting since labor day weekend and some recent rains. Oddity is that there is zero sign of the leak above the linoleum. The trim above it is dry, everything feels solid. Cant find any leaks on the water heater and the signs of moisture seem to end under it. Wet on one side, dry under the flooring on the other. The awning does have the lower clamp near it but I am stumped. Anyone have any ideas?

[donn0128]

Pay to have it seal tested.

[FLGup]

Water test. Dry everything out first and then start with the door. Have someone pour water at the door from a hose while you look for water with a flashlight from inside. If it isn't th door, try higher up. Keep searching by trying water from different areas. Inspect caulk above....that is the usual areas.

[westend]

Those kind of leaks usually start up higher where rain can accumulate and enter the wall. Gravity pulls the water down through the wall and onto the floor.

It looks like you have another leak with the utility knife, the scissors, and the band aid. Red stuff leaking?

I'd suggest to inspect the walls in that corner and see if everything is solid and sealed. One image you posted shows the discoloration in the corner. Since this is a utility space that is enclosed, I'd suggest to remove wall paneling in that corner and inspect. You may be able to cut the panel along the trim of the enclosure and pry the whole panel piece out of the corner. That would allow you to reinstall easily. One of the small reciprocating saws is a great tool for this kind of job.