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HOW TO TEST A BLOWER MOTOR

TESTING TO SEE IF ANY GOOD

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  • Dayton Master
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To test the motor windings, use a multimeter to ohm out the common wire wtith the remaining wires of the motor, youn should read resistance, if you read OL on your meter the windings are bad. To test for a short to ground, check the resistance between each motor wire and the motor frame, you should not read resistane ifnyou do the motor is shorted to ground. To test mechanically, spin the shaft by hand, it should move easily, if hard to turn replace the motor. You can also apply power directly to the motor and if it does not start replace motor. Hope this helps

Posted on Dec 11, 2012

Testimonial: "GREAT ADVICE !! "

  • CHARLIE B.WILSON
    CHARLIE B.WILSON Dec 11, 2012

    THANX A LOT ROBERT, THAT WAS VERY HELPFUL !

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A/c blower motor works if I pull power and plug back in until I cut engine off. Then I have to repeat process


Daryl, You may want to check the blower relay/ just switch with one of same type and try and if OK, problem could be the blower motor, wires/plug loose,damaged,burnt or a faulty blower motor resistor. Second link has some trouble shooting of a overheating wire problem, that is to be common in these trucks. Check the attached links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
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How to test blower motor for a 1981 gmc


Turn key on, turn blower switch on, unplug connector off blower motor, with test light check for power and ground at the connector. If signals are good, replace blower motor. If signals are not good, possible blower resistor failed , fuse , relay , controller, etc...

Dec 28, 2013 | 2000 Ford Ranger SuperCab

1 Answer

Air and heat blower will not come on. 1998 sonoma 2.2l


start by checking fuse. if fuse is good, aquire a test light, check the test light on the battery to make sure the test light works. Power to ground = light. access blower motor under pass-side dash panel.(probablly have to remove underdash cover, secured with pop-in style fasteners.) locate blower motor. 2 wires w/connector Purple-power, black-ground. check for power at purple w/test light on known good ground, with ign on, and blower switch on high. if it has power, hook clip of test light to a power source, ( + on battery w a jumper wire) and probe black wire, with test light. if no light, jumper that wire to a good ground. if it lights, you have a bad b-motor. if no light on power side of blower motor, and fuse is good, check power to swith. blower circuit may have 2 fuses. 1 for high and a 2nd for the lower speeds. if switch has power to it, and power is transfered to another wire when switched, suspect the blower motor resistor. James White, White Automotive, Hopkins Mo. ASE tech, 17 yrs exp.

Feb 06, 2013 | 1998 GMC Sonoma

1 Answer

Blower motor does not work, but getting voltage to motor & motor is good


It can be faulty blower motor relay or its issue with blower motor resistor.

Get the blower motor re-inspected. If its faulty it has to be replaced.


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For blower motor testing and replacing, check the link below:----

Blower motor Testing/replacing for all vehicles?

http://repairhelpcenter.blogspot.in/2012/02/blower-motor-replacing-for-all-vehicles.html

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These will help.

Thanks.

Nov 27, 2012 | Cars & Trucks

1 Answer

2002 blower motor replacement


What kind of vehicle? If you have a test light dissconnect the plug from the blower motor, you can use the test light to check power and ground. first take your test light and hook it to your battery make sure it works. When you put your lead on the negetive you are checking for power and when lead is on power you are checking for ground. Now do the same with your connector if you are missing the power or ground with your cars ignition in the on position and blower motor switch is on your blower motor is good. But if you have power and ground at the connector you need a blower motor. I would cycle your switch on and off when checking the power this will simulate the circuit check and your test light will go on and off just like your blower motor would if it is working. Good Luck

Nov 21, 2012 | Cars & Trucks

1 Answer

Trouble shoot blower motor switch


Often times the problem is the blower resistor not the switch.
You would use a meter or a test light to check for power at the resistor and also the switch. The resistor controls power to the blower motor to adjust speed.

Sep 16, 2012 | 2000 Mitsubishi Montero Sport

1 Answer

Why won't the blower motor work in my 1990 plymouth laser


you may have a relay that is not working or your blower motor is simply burnt. find the connections for the blower motor uplug and test to make sure you are getting power to the blower.if you are then test the blower motor.if that is allright then test your resistors for the different speeds .it may be one or all but in my experience 90 percent of the time the blower motor is the culprit.

Nov 21, 2011 | 1990 Plymouth Laser

1 Answer

Trying to find fuse for blower motor on my 2004 dodge durango


Get a good fuse tester. Test all fuses. There are two fuseboxes. One under the hood & one inside the vehicle. All the fuses can be tested while still in the fusebox. there are test points facing out on each fuse. The ignition switch should be in the "on" position during the fuse testing. Power on only one side of the fuse, the fuse is bad. Power on both sides of the fuse, the fuse is good. Power on neither side,may be a spare fuse. If all the fuses test good, the blower motor may have to be tested. Most Durango blower motors, can be removed for testing &/or replacing from under the right side of the dash, without a lot of work.

Jan 29, 2011 | 2004 Dodge Durango

1 Answer

Location of heater blower relay on '92 Accord


If the fuse is good,check to see if there is voltage to the blower motor,if there is,replace the blower motor.Sometimes,not always,if you bump the blower motor,it will start working,if this happens,then the blower motor is bad,if it does not,the fan switch could be bad,but the relay is usally near the blower motor.Testing it with a test light is the best way to test it,ground one end of the test light,the other end has a point on it.Use the piont of the test light to touch all the legs on the relay,with the key on,and the fan on high.The test light will light up,on almost all the legs,but it will also activate the relay when you touch the right leg of the relay,the relay needs to stay plugged up as you do this.If you can not access the legs of the relay,because of a skirt on the relay,push the point of the relay into the wire that you are testing,or into the plug,near the leg of the relay.The legs I am refuring to,are the prongs on the relay.If the relay clicks and turns the fan on,when you touch the right one,then the fan,and the relay are good,it will be the blower fan switch.Now if you already have high,blower fan,and the lower speeds are the problem,replace the blower resister,It is mounted right next to the blower motor,and has about 7 wires plugged into it.

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3 Answers

2003 Suburban heater fan will not working.


three things left to check,
using test light see if you have power at motor with key and switch on,if you do replace motor,if not locate blower motor resistor it will be close to motor,check for power going in,last is the heater control assembly

Dec 10, 2009 | 2003 Chevrolet Suburban 1500

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