You should be able to contact American Coach for schematics. Are you getting voltage to the blower motor? If so and it does not run on any speed it has a bad motor. If not check the resistor pack that changes the speed the motor will run and/or insure a good ground. 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