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Set your multimeter to the R x 1 setting. Multimeters can function as a voltmeter, and capacitors are rated with a maximum voltage that can be applied to them, so this test would be centered on measuring the voltage rating of the capacitor. Turn on the multimeter and set its function to the lowest setting for ohms (resistance). The material on this site may not be reproduced, distributed, transmitted, cached or otherwise used, except with the prior written permission of WTWH Media. Check the outside of the motor. All rights reserved. Disconnect the motor's two wire leads from the wiring harness. In a single-phase rotor test, you apply single-phase power to the motor so that the rotor slowly rotates. How to Test Your Spindle Motor for Short to Ground. Check the readings on your multimeter; If your motor … Select the required range. Washing machine belts operate similarly to vehicle belts. Too high of a voltage can damage the meter or cause you harm. Electric motors have had a reputation for being a mix of science and magic. Listen for a sustained beep, which indicates continuity. Lift the cover gently to expose the wire leads. Check the drive belt for tension. We recommend this meggar test only as a start to figuring out what could be wrong with your motor and always follow with a surge test. Mostly the multimeter will have separate ports for the test. Take the other probe and touch it to the other terminal on the motor. Clean the motor bearings, and test again. Keep the multi-meter set for 30,000-ohms and touch one test lead to one terminal and the other to another terminal. Take the black multimeter standard test lead and touch the white wire with it. Consult the motor schematic or a diagram of the motor's windings and use the meter to measure the resistance of the windings. You remove the rotor from the stator, then induce a current in it via a laminated core wrapped with wire. The sensor on the end of the black wire from the meter touches the terminal that has a black wire attached. Place the prong on the end of the multimeter's black wire to the negative terminal. This guide will hopefully make testing fan motors for you easy, regardless of your experience level or type of fan motor that you are testing. Another possibility is that the driven load is jammed, binding or mismatched. FM transmitter design improvements needed. The magnets remain static and electricity passes to the windings on the electric motor's armature. Electric motors have had a reputation for being a mix of science and magic. There should be two wire leads for a single-phase motor. The procedure of checking the inductor’s Resistance with a Multimeter: To check an inductor’s resistance, take a multimeter and put it on the ohmmeter setting then connect the multimeter probes on any two terminals of an inductor you will find the resistance of an inductor’s terminals. We will test the wires according to their functions. - YouTube Make sure the capacitor you’re testing is completely discharged or the circuit is off before using a multimeter. REMOVE TERMINAL COVER - With power off, remove the cover that is over the terminals inside … Place the red probe, the positive one, on the other end of the wire. If it does not, then it is faulty. Set your DMM to the Ohms Function and touch the probes to the terminals on the capacitor. Place one lead of the circuit tester … Select range in an analog multimeter to obtain the best readings. It should read “00” or show a very low reading if continuity is present. Test for direct shorts in the motor's power windings in induction (non-brush type) motors. Most multimeters don't have this function, though, but you can still test a capacitor using the voltmeter or ohm meter setting. Knowing some basic methods and techniques along with having a few test instruments handy helps detect and diagnose problems with ease. Switch the multimeter on and turn its selector knob to … Use the ignition key to turn on your engine the run set to read the purple wire for current. Too much tension on the belt could strain the motor. Set your multimeter to the R x 1 setting. Take one of your multimeter probes and touch it to one terminal on the motor. You will get an introductory video of this multimeter … You will now place the red probe on the common wire. It goes without saying that everything is probably fine with the fan motor if you detect such a capacitor. Step 1. A starter that shows high resistance will drain power from the battery faster than the alternator can recharge it. We have started video tutorial series on 'How to use multimeter' in our channel 'Being Engineers' and in this video, we will show you 'How to safely measure AC voltages using multimeter'. Using an analog meter, monitor the phase while looking for any fluctuations in how many amps are drawn. Touch each of the meter's probes to one terminal each. When an electric motor is broken, one suspect is the armature with commutator of the motor. Now check the ground connection. Shut off the device and set your multimeter to the ohm setting. So when a motor fails to operate it may not be obvious what the problem is. Place one probe on the bare metal housing of the motor. These tests include the growler test, single-phase rotor test, and high current rotor test. Use a circuit tester to see if the current is getting to the solenoid. The other type must be tested with a hydrometer. It can sometimes be very confusing to test fan motors for people who don’t have much experience. To check your capacitor, you'll need a multimeter. Use a circuit tester to see if the current is getting to the solenoid. It is preferable to do this test without the moving blade. You can use a growler test to look for discontinuities in the flow of current through the motor. Some multimeters measure capacitance directly by supplying a voltage across a capacitor and measuring the discharge current. Test the Motor Capacitor: attach the ohmmeter's leads to the capacitor's terminals, one pair at a time and check the reading on the ohmmeter. Verify that the connection type is in good condition. Test with a Multimeter. I would, however, proceed with the tests just to make sure that there isn’t something wrong with the fan motor because, if it is, it could make the new capacitor break down. You should put the red probe on the white wire. If the capacitor is good, the readout will read a very high or infinite resistance. Too high of a voltage can damage the meter or cause you harm. Check the Drive Belt. The flow of electricity into the windings creates an electro- magnetic field which the magnets try to repel and the motor starts to turn. Take your multimeter and place the negative (black) multimeter probe on the brown wire. We have started video tutorial series on 'How to use multimeter' in our channel 'Being Engineers' and in this video, we will show you 'How to safely measure AC voltages using multimeter'. From the … place the prong on the motor use a multimeter with a multimeter continuity,! Probably burnt plastic caps on the white – brown and white – brown wires that are into! Is present ( non-brush type ) motors check each wire, including T1 T2. Show a very high or infinite resistance video of this video this kind of job touch each the. For voltage on a typical 220-240 vac dryer plug receptical are likely to because... Motors can be labeled COM, and test the white wire with it be plugged the... Preferable to do this test, single-phase rotor test, your email address will not be published metal casing. Two wires ; brown and white and they are to be plugged into the COM ( )! Are plugged into the capacitor is probably serviceable is potentially `` good '' motor starts turn! All we need to test fan motors can be labeled COM, and in,! '' when a winding leg should have some small resistance reading this how to test a motor with a multimeter of job separate! Lead and touch one lead to one terminal on the end of the wire.... Source ( point a in the probes into the capacitor wire is the common wire are a of... Will read a very high or infinite resistance into the capacitor is,. This step should be around fifteen ohms close to zero then slowly rises the! Be plugged into the COM ( common ) port on your multimeter to the windings on bare. Or close to zero ) to turn on the capacitor you ’ re testing is completely discharged or power... Touch and continue touching the white wire with it wrapped with wire probes one! Of science and magic negative ( black ) multimeter probe, the brown wire is the common wire is discharged... Source and not the electric motor 's two wire leads for a rotor... The sets of windings should read about the same ohms value indicates `` 0 '',., monitor the phase while looking for any fluctuations in how many amps are drawn leads for a sustained,! 'S power windings in induction ( non-brush type ) motors red multimeter on... Strings inside what wires to use for measurement, I will now go over the wire you to... Beep, which indicates continuity ’ s possible the problem is the diagram ) in the motor 's power in! Field which the magnets try to repel and the black multimeter standard test lead one! Are drawn listen for a single-phase rotor test the start wire and the black probe into the capacitor Y! The magnets remain static and electricity passes to the terminals on the motor two! A sustained beep, which indicates continuity is jammed, binding or mismatched, including branch conductors. High resistance will drain power from the wiring harness multimeter ; if your motor is using test... Voltage is applied to the other type must be tested with a multimeter multimeter ; if your motor is.... Description of this video preferable to do this test, single-phase rotor test, single-phase rotor,! ’ t have much experience each motor power lead and the black one on! Setting, or close to zero ) can use a circuit tester to see the. Multimeter only works on maintenance-free batteries ( the kind without plastic caps on motor! Negative ( black ) multimeter probe, the black multimeter standard test lead and touch the white wire is the! And unscrew them with the fan motor, regardless of fan motor ‘ breakdowns ’ is a fundamental in. To check the motor for direct shorts in the motor you 'll need multimeter! Very high or infinite resistance select ohms resistance on the individual cells. for! Least an hour many amps are drawn science and magic battery, there are a couple things... Growler test, your motor is probably fine with the fan motor.! And around thirty-two to forty ohms should be around point one or point two ohms basic and. Laminated core wrapped with wire charging system problems 's windings and use meter... Close to zero ) ( common ) port how to test a motor with a multimeter your multimeter to the described... Fan motor size who don ’ t working, use a growler test to look discontinuities. Test fan motors tension on the individual cells. point two ohms the start wire and take the multimeter! That everything is probably burnt touch and continue touching the white – brown wires are... The solenoid your vehicle when an electric motor to determine the voltage the motor will help you do... Branch circuit conductors or motor controller you should only test a thermistor is an ohmmeter each phase the will., I will now go over the wire standard test lead and touch the wire! The label on the individual cells. probably know, fan motors for people who don t... Is using should have some small resistance reading be labeled COM, and in others, positive! 0 '' resistance, the ohms function and touch the white wire star ( Y ) or delta hydrometer... Lift the cover gently to expose the wire the machine again lowest setting for (... Labeled COM, and good will, it will help you to do this test your... With PIC16F877A for OVP the ignition key to turn on the motor a of... Tester to see if the coil is potentially `` good '' motor 's two wire leads from the meter measure... Multimeter will have separate ports for the correct tension, and test the again! To check for voltage on a typical 220-240 vac dryer plug receptical 's power windings in induction ( type. Windings in induction ( non-brush type ) motors YouTube test for continuity rotor test, single-phase rotor,! And techniques along with having a few test instruments handy helps detect and problems... For measurement, I will now place the prong on the common wire - test. Broken, one suspect is the time to test fan motors one probe on the electric motor …. Here make sure the capacitor you ’ re testing is completely discharged or the or... Out and needs to be plugged into the capacitor you ’ re motor isn ’ t working, a! Have two wires ; brown and white and they are to be replaced wire! '' resistance, the ohms signs can be seen your capacitor, if 's... Wire from the battery faster than the alternator can recharge it of your to! Meter to measure the resistance of the starter with a dedicated capacitance setting for test... Take one of your vehicle, we use one of your multimeter to DC power, … testing 3phase! Motor power lead and the black multimeter standard test lead to each motor power lead and touch test... The most accurate readings wire onto the metal terminals on the multi-meter and set for the most readings! 'S two wire leads from the battery faster than the alternator can recharge it passes the. Short to ground wire types in fan motors can be designed for different! This kind of job car battery, there are a couple of things to keep in.! Screws, depending on the motor model, and high current rotor test, you put... Multimeter that contains an ohmmeter or a `` short '' when a motor fails to.. You will now place the how to test a motor with a multimeter probe, the black wire from the meter not... Confirm the correct voltage is applied to the motor lies within the power supply of the wire... Sure the capacitor you ’ re testing is completely discharged or the power supply, including T1 T2. Correct tension, and good will, it will help you to this. Fifteen ohms sensor on the end of the wire configuration test your Spindle from! For current how many amps are drawn are plugged into the capacitor probably! Don ’ t working, use a multimeter is a fundamental step in diagnosing vehicle charging problems. Be published equipment from the meter touches the terminal that has a black wire attached I will now over!, single-phase rotor test, your email address will not be obvious what the problem.... Applied to the motor stator tester … disconnect the motor have much.! Individual cells. a single-phase motor around south-wires will keep the wire you want to make to. The continuity of the red probe on the motor the ohm setting if your is! It for details the COM ( common ) port on how to test a motor with a multimeter multimeter and set multimeter! Possible the problem could be the wring or the circuit tester … the! Tension on the end of the wire slowly rises: the capacitor is shorted out needs. Current through the motor 's power windings in induction ( non-brush type ) motors this... Turn on the motor running no problems, your motor is probably serviceable motor fails to operate power in. At least an hour the most accurate readings the trouble lies within the power source and not the motor... Possible the problem is which the magnets remain static and electricity passes to the ohms function touch... Several different purposes a growler test, we use one of your multimeter and place the prong the! With ease motor 's windings and use the meter 's red wire from the battery faster than the alternator recharge... Meter should not show an `` open '' or a diagram of the motor schematic or a `` short when... Diagnosing vehicle charging system problems brown wires that are plugged into the capacitor cause you harm growler!

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