There are some fuses in the converter that will blow if you accidentally hook up the battery backwards. Check them. I believe they were to the left of the main vertical line of fuses on my 2012 Roo 19. See the two fuses pinkish fuses on the left in the pic.
1988 Coleman Sequoia - popup (1987-2007)
2012 Roo19 - hybid (2012-2015)
2016 Mini Lite 2503S - tt (2015 - ???)
2011 Traverse LT, 3.6L, FWD
2009 Silverado Ext Cab, 5.3L, 4x4, 3.73
2016 Silverado 2500HD Dbl Cab, 6.0L 4x4, 4.10