No power to panel?

[zroadhouse]

Dale, thank you for your helpful reply. I have a GFCI tester similar to what you show. Yesterday I also unhooked everything from the panel (including the power in!!) and still had no dice with the GFCI on the house. I strongly suspect that I either did something wrong when I rewired the inlet (likely) or that there is actually a short somewhere else (insulation rubbed through).

By re-wiring the inlet with fresh 10 gauge cable, I should be able to more easily test that the inlet is good. Then I can move on to systematically checking the panel wiring one circuit at a time as you described.

[zroadhouse]

Hot and ground (black and green) are connected somewhere.

[zroadhouse]

Looks like I caused the short when I put the inlet back together by clamping the hot wire against the ground wire. I carefully reassembled the inlet with new wire, plugged in, and seems good. Now to carefully rewire the panel.

[zroadhouse]

Success! My outlet on the trailer tests green!

[MtnDon]

[zroadhouse]

No thread would be complete without pictures. So here are some I took while figuring stuff out. Thanks to everyone who helped!