Look for the blower motor under the right end of the heater box, under the dash. It should be right above where the front passenger's feet would be. Bang on that while the fan is turned on. If the motor starts running, it has worn brushes and will intermittently not start up. When it does run, it will continue to run until it is turned off.
If it never runs, check for voltage between the two wires in the plug for the motor. If you find 0 volts all the time, the thermal fuse in the resistor assembly is burned out. That is because the motor has tight bearings. If you don't replace the motor, the new resistor assembly will also burn out. Normally that resistor is bolted to the heater box just under the radio, but your car model is similar to my Dynasty. They have the resistor under the hood, way up at the top of the firewall, close to the right hood hinge.
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Saturday, July 29th, 2017 AT 1:10 AM