Unless the fuse or breaker is blown it should work.. I hope you realize that when you tow you have to have the battery attached.. if the trailer becomes detached from the tow vehicle on the highway the trailer e brake wont work without the battery in place.
2004 Chev Silverado Duramax optioned past the max. 2009 Jayco Eagle 308 RLS 765 watts of solar, 6-6 volt batteries (696 amp hour), 2000 watt (4000 surge) whole house inverter.
140 days boondocking in 2016
211/2015, 196/14, 247/13, 193/12