It may be you just blew the battery fuse in the converter. The tongue jack draws a lot of current. Could be more than the converter was designed to handle. Typically the tongue jack is connected right at the battery.
Chuck - Sparta, TN
2012 Jay Flight 22FB, 2 x Honda EU2000i
2013 GMC Yukon XL Denali AWD
EDUCATION is what you get when you read the fine print.....
EXPERIENCE is what you get when you don't.