Keeping this in consideration, how do I know if my DC motor is bad?
To test your DC motor, touch the leads of the ohmmeter to the leads of the motor. The meter's screen should indicate a low resistance (somewhere between 10 and 30 ohms), but if it reads an infinite ohms or an open circuit you should rotate the end shaft of the motor.
Similarly, how do you test the windings on a DC motor? The most common method used to check for shorted windings is to perform a drop test. In this test an ac voltage, normally 110 volts, is applied to the field leads. The voltage drop across each field pole is measured with a voltmeter. In a healthy motor, all voltage drops should be equal.
Correspondingly, how do you test a fan motor?
How to Test Your AC Fan Motor
- Check the power. If you suspect the fan motor is bad, the first thing you should check is the power to the motor and the power to the air conditioning unit.
- Check the windings. Next, check the windings of the fan motor for an open or a short.
- Inspect the capacitor.
How do you test a 12v DC fan motor?
Check to make sure the DC motor's rotor can turn with no impediments. Switch the voltmeter to "Ohms". Attach one end of the red lead wires to the DC motor and run the DC motor's red wire to the battery. Attach the clip of the black lead wire to the DC motor and run the black motor wire to the battery.
