I have been unsuccessful in finding them online and I have confirmed that my fuses/blower fan are all in working condition and I have replaced the air conditioner/blower relay and yet my blower fan … How to test and replace your blower motor resistor - YouTube How do I reset my Whirlpool Duet steam dryer? A good motor should read less than 0.5 ohms. My blower only works on high, so I pulled the resistor and checked it with my voltmeter. Any value greater 0.5 ohms indicate trouble with the motor. In the past, this was done by varying the voltage supplied to the blower motor. Misc Index  |   If it’s a zero reading, then this indicates that your winding has a shortage. The connector is a 3 wire. You'll need to remove the resistor block to test it and once removed, you'll be able to inspect it for any heat/burn damage on it and its connector. The second method requires only 2 measurements but it is a little more complicated test setup. Earth Continuity and Resistance Test With a multimeter, measure the resistance between motor frame (body) and earth. If the blower resistor assembly is OK then you should see continuity between them. The change in resistance then limits the current through the motor, which dictates the speed at which the blower fan works. Select ohms resistance on the multi-meter and set for the 30,000-ohm range. You should discharge the capacitor before handling it. This electrical component is used to control the air conditioning system of a vehicle. If the circuits are in good repair but the blower motor keeps blowing fuses, replace the blower motor [source: You Fix Cars ]. The blower motor resistor is responsible for controlling the blower motor speed. Locate the fuse for the blower motor in the owners/service manual. How to Test a Blower Motor. Earth Continuity and Resistance Test With a multimeter, measure the resistance between motor frame (body) and earth. Testing the blower motor is as simple as applying battery power and Ground to the blower motor terminals. A good motor should read less than 0.5 ohms. What is the most powerful handheld blower? Unplug the blower motor and test for power using the 12-volt test light in the same manner as explained in Step 1. En Español  |   A blower motor resistor is an adjustable resistor. This tutorial will help you test the 2001-2004 Dodge Dakota and Durango blower motor resistor in a step-by-step way. Honda  |   (4.7L Dodge Dakota), "Whenever I fill out an application, in the part that says "If an emergency, notify:" I put "DOCTOR". This is the correct and expected test result. Start car and see if blower motor works. Blower motor works in some speeds, but NOT all speeds. Test the fuse, with the ignition key on, using the 12-volt test light. It will be located between the heater and air conditioning control knobs and the blower motor itself. Unplug the blower motor and test for power using the 12-volt test light in the same manner as explained in Step 1. Copyright 2020 FindAnyAnswer All rights reserved. When you turn a knob to produce more air flow for heat or cool air, the resistor adjusts the electrical resistance to control the power sent to your blower motor. Similarly, you may ask, how do you troubleshoot a blower motor resistor? Ignition System Wiring Diagram (2002 4.7L Dodge Dakota And Durango), Ignition System Wiring Diagram (2000-2001 4.7L Dodge Dakota), How Often Should I Replace The Spark Plugs? Ford  |   In newer applicati Disconnect the blower motor resistor from its connector and remove it from its location. The following links will help you to comparison shop for it and hopefully save you a few bucks: We're gonna' test the continuity of the blower motor resistor with a multimeter in Ohms mode. Test for ground at the blower motor if there is power indicated at all ranges, but the motor does not function. If the blower resistor block and connector have any heat damage (in other words: burns or are melted), you can stop here and conclude they're bad and need to be replaced. Do NOT follow this link or you will be banned from the site! How do you test a blower motor resistor with a multimeter? If fuse blows again, check for loose circuits. In high speed the resistor is bypassed and power is fed to the motor directly from the switch. In the past, this was done by varying the voltage supplied to the blower motor. Start car and see if blower motor works. Continuity should be present between all terminals. Resistors do not hold a polarity, so it doesn't matter which side gets the red or black lead. If the resistor block's connector is damaged or is melted, it must be replaced with a new one. Attach the clip lead of the test light to a good ground like a bolt screwed into metal, and touch the sharp probe end to the terminals on the fuse. Any value greater 0.5 ohms indicate trouble with the motor. Your purchase helps support my work in bringing you real diagnostic testing information to help you solve the problem on your vehicle. Let's take a look at what your test results mean: CASE 1: Continuity exists between all the blower motor resistor terminals. The most common symptom of a failed blower motor resistor is when the heater fan only runs at the highest speed setting (4 or 5) and doesn't work at low speeds. The blower motor resistor is an electrical component that is a part of the vehicle's heating and air conditioning system. If the resistance IS NOT within specification, we can conclude your Honda Civic's blower motor power transistor is bad and needs to replaced. This material may not be reproduced without the author's consent. What does it mean when a resistor is open? How To Test The Blower Motor Resistor (2001-2004 Dakota, Durango), TEST 1: Resistance Testing The Blower Motor Resistor, Blower Resistor Continuity Specification Tables, Cómo Probar La Resistencia Del Motor Soplador (2001-2004 Dakota, Durango), How To Test The Blower Motor (2001-2003 Dodge Dakota And Durango). To find out the amperage draw, we'll test the blower motor's resistance. What happens when a blower motor resistor goes bad? NOTE: If continuity DOES NOT exist between 2 terminals, your multimeter will display the letters OL (Open Loop). Your vehicle's blower motor resistor controls the speed of your blower motor. It felt a little stiff too me. Blower resistors, being a mechanical component, are prone to wear and are the most common point of failure in a car’s heating system. One of the first symptoms of a potential problem with the vehicle's heater blower motor is low airflow from the vents. 100% Brand New Aftermarket Blower Motor Resistor with Premium Quality. Another symptom of a bad or failing heater blower motor is a motor that only functions at certain speeds. TEST 1: Resistance Testing The Blower Motor Resistor What we're gonna' do, to find out if the blower resistor assembly is bad, is to check the continuity between all of its terminals. Set an ohms range that is equal to or higher than the value of the, Common reasons for this to happen: Blown fuse: Like many electrical units in, This is due to the voltage attempting to force more current (electrons) through the, Any interruption in the circuit, such as an. What is the difference between teak oil and linseed oil? Original standard, direct … Both the front blower motor resistor and the optional rear heater-A/C unit blower motor resistor can be diagnosed using the procedure that follows. Blower Motor Resistor Testing An A/C blower motor resistor uses resistance to control the speed of the blower motor. Fixing Dodge Blower Motor Problems. How do you know if a resistor is bad? (Check the meter's operation manual if necessary) Choose the highest scale (R X 1000 or similar) and zero the meter by touching both probes against each other. You can test the resistor with an Ohm meter (don't know what spex are). Components and wires are coded with colors to identify their value and function. Locate the fuse for the blower motor in the owners/service manual. 18 thoughts on “ ECM 2.3 Variable Speed Blower Motor Troubleshooting ... have done so for nearly 20 years. What kind of transmission fluid does a Nissan take? Testing the blower motor of your home HVAC system If debris is not the problem, use your multimeter to check for voltage in the contacts motor. NOTE: To see actual resistance specifications for the continuity test of this test section, go here: Blower Resistor Continuity Specification Tables. Depending on the exact location of the blower motor (on your specific 3.8 liter equipped GM vehicle) you can test it on the car or you may have to remove it for ease of access. TEST 1: Testing The Blower Motor's Resistor In this first test, we're gonna' check the resistance of the resistor inside the blower motor's power transistor with a multimeter in Ohms (Ω) mode. Does anyone know what the blower motor resistor specifications are? For circuit descriptions and diagrams, refer to Air Conditioning/Heater in Group 8W - Wiring Diagrams. Diagnosis/Testing - Blower Motor and Fuse f33 High Resistance in Supply Line and/or Fuse f33 - Blower Motor The blower motor resistor is responsible for controlling the blower motor speed. What's the best leaf blower on the market? How to Troubleshoot a Blower Motor Resistor. Stable characteristics, high reliability, resolves over heating issues. Nissan  |   To test a resistor or motor, you’ll need to know the basics of electrical circuitry and have access to a multimeter and the proper electrical specifications for the involved circuits. What are the signs of a bad blower motor? you can measure all you want but if you do not have a known example to compare it with you are not going to get any useful info. Use voltmeter or ohmmeter to check for a blown fuse. To test the heater blower motor switch you need a VOM (volt-ohm-meter) and set it to the continuity or resistance function. Mitsubishi Click to see full answer Keeping this in consideration, how do I know if my blower motor resistor is bad? If there isn't any burn damage to the resistor's coils or its connector, then you can conclude the blower motor resistor block is OK and not defective. It will have to be thin camper tape 2 duct tape the outside of the plenum. 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