The battery may have been fried from going dead, the brakes should not have been hurt as they rely on movement to activate them HOWEVER the emergency brake switch my be toast... the points inside it my have fried from the current going through them.. best way to check.. hook up pull the emergency pin and see if you can move the RV if you can the breakaway switch is fried..
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