If there is another GFI, it won’t be connected to your failed one. Think back to anything you did before when it was working.
It could be a failed GFCI outlet, and since they aren’t that much, I might be inclined to replace it first. Since there is a “supply” side and a “load” side, you could disconnect the power to the trailer. Then take the outlet apart and test for continuity across the hot and ground. If there isn’t any I would change the outlet. If there is then your off on a hunting trip without a guide as wiring diagrams are elusive as a unicorn.
Let us know what you find.
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2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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