Thanks for all the help. I was finally able to pull the heater blower motor with the intent of replacing the brushes. Before repairing the motor, however, I applied 12Vdc directly and the motor works fine.
The motor therefore was not the problem with the blower fan not working. Next to the motor is a finned aluminum "heat exchanger" with three input wires out to a plug and a red and blue wire going to the motor.
I suspect that there is an over temperature sensor on the "heat exchanger" that may have failed in the open position because I do not get continuity across this unit from the blue motor wire to any pin on the plug.
I do get continuity from a pin on the plug to the red motor lead.
3-Wire Plug -> Finned Aluminun Heat Exchanger -> (Red & Blue Wire) ->
Motor
Can anyone confirm that there is a normally closed (NC) overtemperature contact on the Finned Aluminun Heat Exchanger?
(Since I have voltage on the female end of the plug I do not believe that the pushbuttons are an issue. Any other trouble shooting tips will be appreciated.)
Anyone with a circuit schematic?
Thanks