Paul, I agree that you have a problem with the emegerncy start solenoid as it should be open unless activated. Either repair or replace. If you decide to leave it disconnected at the cable you will not effect anything else but will not be able to join both the house and chassis batteries without it. To check to se if the altenator is charging a battery bank, simply check the volltage of the bank before starting the motor. Recheck voltages after starting the motor; it should co up in value to about 13.8 to 14.2 volts. GOod luck and keep us posted.
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7