Test the motor for continuity using a multitester. Set the multitester to the ohms setting X1. Touch each probe to one of the wires or terminals. The reading should show continuity in the range of 600 ohms for a functional motor. A reading of infinity or zero indicates a faulty motor and it should be replaced.
Testing a Three Wire Motor
Test the motor for continuity using a multitester. Set the multitester to the ohms setting X10. Touch one probe to the wire from the wire cap. Touch the other probe to each of the two other wires in turn. The reading should be between infinity and zero for each wire.
If the motor test results in a zero or infinity reading on either wire, the motor should be replaced.