120VAC and 12VDC are separate systems. You should put the battery back in and connect it. If your trailer has any slides, operating them without a battery can damage the converter. Make sure to connect the battery cables correctly-WHITE is NEGATIVE.
Now as far as having no power: first thing is to make sure you have power. Turn everything OFF in the trailer, then check the plug at the house. If there is power, then you have to verify power at the trailer.
If your comfortable using a Volt/Ohm meter, you can check the main breaker at the panel.
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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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