Newbie with electrical problem.

Which is the FIRST outlet then the SECOND and so on? It should be required to provide a secematic of how the wiring was done.or photos before the walls go on. Most wiring I am familar with on an rv is Vampire connections where the wire is pokked into the back of an outlet and a cover snapped over it. If that outlet fails the others down the line still work. GFCI outlets still have screws so maybe the load has loosened up a wire and has caused the trouble. I would check at the gfci first. Pull it out and test, just don't look at it. I've changed too many that have reset and still nothing comes out.