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**chuckster57** · 12-30-2017, 08:32 PM

Welcome to the forum

First off YES the battery has to be connected to the trailer for the DC appliances to work if not plugged into shore power. Very important that the leads be hooked up properly. As a rule the white is negative and black is positive. In some cases the red is positive and black is negative.

If you plugged into shore power without the battery connected, then you may have shorted out the positive cable and blown a fuse. Hooking up the battery backwards even for an instant will do the same thing.

Look at the fuse panel, there should be a long row of fuses, probably 15A and off to,the side should be a pair of 30 or 40A fuses. Test those. If everything is right then you need to test the output of the converter. When plugged into shore power it should produce 13VDC+, if it isn’t then look for blown fuses on the back.

12-30-2017, 08:32 PM	#3
chuckster57 Site Team Join Date: Jul 2014 Location: Modesto Posts: 20,357	Welcome to the forum First off YES the battery has to be connected to the trailer for the DC appliances to work if not plugged into shore power. Very important that the leads be hooked up properly. As a rule the white is negative and black is positive. In some cases the red is positive and black is negative. If you plugged into shore power without the battery connected, then you may have shorted out the positive cable and blown a fuse. Hooking up the battery backwards even for an instant will do the same thing. Look at the fuse panel, there should be a long row of fuses, probably 15A and off to,the side should be a pair of 30 or 40A fuses. Test those. If everything is right then you need to test the output of the converter. When plugged into shore power it should produce 13VDC+, if it isn’t then look for blown fuses on the back. __________________ 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.