Are you batteries all dead? You probably have two battery banks, one for starting the engine, and one for supplying the DC power to your coach accessories. It is possible that the bank which starts your generator is dead. However, typically, the coach manufacturer supplies a switch on your dash to connect the other battery bank to the generator for starting purposes. I is labeled different names by different manufacturers, but look for something labeled, "EMERGENY START" or something like that. It is a momentary switch, so push and hold while attempting to start.
