How to test an electric motor.

A quick way to test an electric motor for short circuit or open circuit windings.

[KarstenBondy]

What does it mean if a motor's continuity between the terminals goes up from 0.006 to 0.112 depending on where it is turned? I have a motor that passes every test except this one, and does not work. Is this something that can be fixed by taking it apart and cleaning it or something?

[tomcook]

Is the checking between windings and case called a leakage test? I’ve heard the term but not sure what it is.

[דותןאלברט-נפ]

hi there im using a multimeter like you are doing and i get some nods but all of them under 10, would you mind helping me with it?

[Therealjimjam]

Hello! Thank you for the video! I am checking a dec fan from a radiator in a car, I do have about 8-100 ohms reading from one leg of the motor to the casing of the motor, that means it is bad, right?

[roberthutchison]

Thanks i have bought a couple china HD 12V motors and they don't work at all? I will use your video for troubleshooting.

[lengthmuldoon]

Any idea what might be the problem with a cordless circular saw that runs but at about 50% of rotational speed. The batteries charge but there just isn't enough umph from the motor to cut even the thinnest bit of wood.

[bearknuckles]

So what are the readings if the motor is not ok?

[MagicAyrtonforever]

Great video, I have a friction wheel on a Peugeot 207 which I think is causing a short to earth on three sensors on this vehicle. The motor has a high resistance between the two terminals (nothing to the case) Could the 18 + ohm resistance be causing issues? With that one motor disconnected all the faults clear and don't return.

[richardbraun]

How easy does that motor turn.

I have one but seems tough to turn and the bearings are ok

[nolanritchie]

so if im unable to turn the motor like you are doing that means its stuck/broken?

[eviltux]

Sadly not clear for an amateur where and how you exactly connected the probes . Not so useful for many