5.0 out of 5 stars. This will be based in part on motor requirements. If the blower motor itself, when it's getting its power, is having a lot of trouble, if the motor itself is tired inside, the brushes aren't doing their job as well, it's gonna put a lot of strain on the resistor. Motor ran fine. Mark helpful. Fits the following Dodge Ram 1500 Years: 2009-2010 | Laramie Crew Cab 2WD, Laramie Crew Cab 4WD, Laramie Quad Cab 2WD, Laramie Quad Cab 4WD, … It's pretty easy. 1 people found this helpful. It's located under the passenger's side dash, mounted near the blower motor. The motor itself is very low tech. Think of these coils like a filament in a light bulb. In most cases, these resistors will wear out long before the car does. The blower motor resistor, when it goes bad, you'll start losing speeds on your blower. Noisy as can be, but works otherwise. And the resistor is gonna get hot. 12 volts is always present at the motor, and the switch in your dash provides the ground. Blower motor does not work on certain settings. It’s then typically installed in the ductwork, near the car blower—either under the dash or under the hood. View related parts. The blower motor resistor is designed to last for the car’s lifespan. Air flow is controlled using vents and the vents are altered by this resistor. That's why in some cars, the blower motor may still work in the "High" speed setting if the resistor is bad. Tools & Materials List. For example, you might have speed one and four, but not two and three. The blower motor resistor plays an important part in the luxury provided by BMW as it is intricately related to the functioning of the AC system. It is a white plastic trapezoidal-ish piece that is fastened by two Phillips head screws. I removed the blower motor. If you start at the blower motor, and check resistance in the circuit, you will find the problem … I have power from the switch to the blower resistor and from the resistor to the motor. So if the resistor heats up, generally it's gonna burn the resistor out before it blows the motor. If the blower motor resistors’ internal components fail it may cause the blower motor to malfunction, or not function at all on one or more of the settings. When a resistor coil burns out, you lose that fan speed. ‘HI’ is the only blower speed that doesn't depend on the blower resistor to function. You've conclusively ruled out the fan. This will make disconnecting the connector from the blower motor resistor block very difficult. Top. The first thing you want to do, is you can see there's a connector right here, and, as you follow these wires, there's another connector right back here. Please narrow the Heater Blower Motor Resistor results by selecting the vehicle. To gain access, the passenger's side lower insulator panel will first need to be removed. It is responsible for controlling the blower motor’s fan speed. How does the heater blower motor resistor work? Also the ground point behind the passenger side kick panel could be bumming. Time left 6d 17h left. The reduction in blower fan speed is accomplished thru' resistors (inside the blower resistor assembly). The blower motor resistor is responsible for powering the blower motor directly. The fuse was blown. Here is the location of the blower motor speed control module (resistor) below. Post by kjhiggins » 12 Sep 2010, 04:34. Remarkably, the blower works at all speeds now. The blower motor resistor is an electrical component that is a part of the vehicle's heating and air conditioning system. IT was nasty! The air conditioning and heating controls allow you to switch fan speeds — and the blower motor resistor controls that speed once you select it. Swap the high speed relay with another relay with the same part number. In this tutorial I'll show you how to continuity test it with a multimeter in Ohms mode (Ω).NOTE: This tutorial only applies to the 1988 to 1993 vehicles listed in the ‘Applies To:’ box on the right column. Additional Resources. Blower works on slow speeds, but not on high speed. Step by Step Instructions. i believe it is but want to double check. I then checked the 30amp Batt3 fuse within the engine compartment. 9 product ratings - GENUINE FORD MOTORCRAFT BLOWER MOTOR RESISTOR MODULE W/ CONNECTORS YH-1827. Hooked it up to a 12V battery. It helps control the speed of the fan that pushes the conditioned air into the cabin. Gently pull the blower resistor down and disconnect the wiring connector. Replacing the blower motor resistor on this vehicle isn't a bad job at all. This can be annoying, but troubleshooting is easy. Plugging the resistor back in, plugging the motor into the resistor but the motor fails to work. Onward... ED7. Your Answer: Upload Photo. Appreciate it guys!! Do not pull of any balance clips on the blower wheel. I went through a car wash the other day. In this car, in the highest "4" fan speed setting, the resistor is bypassed and the blower motor is powered directly by the fan switch. I've found the fan will work on High only if the resistor's bad. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. Follow the wiring harness from the blower motor to the blower motor resistor. Blower motor works in high-speed only. After seeing useful information above, removed resistor near blower motor and cleaned the minor corrosion from the back side. This is why at the bottom of the article we include a 2008 F150 blower motor wire diagram. 10 people found this helpful. Mark helpful. Heater Blower Motor Resistor Auto Temp Controls … Brake cleaner worked on the blower wheel. Re: Blower motor or resistor (controller) bad? Kinda blew me away because the corrosion was very minor. I did notice that the power to the resistor and to the motor are constantly hot, don't know if that is normal. The way this circuit works is all on the ground side. Continuity check time just for good measure. The most common symptom of a faulty blower motor resistor is a blower fan that only works on one speed, usually high. IF cleaning it, do not get the blower motor in any liquid. With that said, failed blower resistor assemblies don't solve all of the possible failures. A blower motor resistor controls the fan speed of the blower, so if you have a blower that’s stuck on one speed or doesn’t work on certain settings, it could be the resistor. This diagram shows how the blower motor resistor is connected in a typical car. The day after that my blower motor didn't work. Another common symptom of a faulty blower motor resistor is a a blower motor that does not function on certain settings. Here are the details about it & signs of its failure, and ways you can fix the blower motor resistor. The coil resistance causes them to heat up, thereby reducing the amount of voltage that can flow to the blower motor. 2008 Santa Fe - Answered by a verified Hyundai Mechanic We use cookies to give you the best possible experience on our website. Both of these components are located in the heater housing, behind the glove box. This is true whether you have an AO Smith blower motor, a TYC blower motor or any type. The resistor is between the power source and the fan, and allows only the desired amount of power to go to the fan. Tools & Materials. The resistor is responsible for controlling air flow though the blower motor. On speeds 1-3 the ground is re-routed through the resistor pack and on high speed it bypasses the resistor pack and the motor gets full voltage. Blower motor works in some speeds, but NOT all speeds. Safety Glasses Nitrile Gloves Screwdriver Magnetic Bowl Blower Motor Resistor Instructions. Is my problem the blower motor resistor. And when one or more of these resistors burn out, you’re usually left with only one heater blower motor speed—high. When the blower motor resistor fails, 1 of the 3 or all 3 first speeds stop working. The blower motor resistor (green arrow) (or final stage) varies voltage to the blower motor to achieve the desired speed. Blower motor won't work, I suspect resistor - how do I test it? (Refer to a service manual to locate yours.) Some 1994 Chevy/GMC pickups use this type of blower resistor. 4 Blower Motor Resistors found. There is no power to the blower motor in my 2008 grand Marquis.I hot wired the blower motor to the battery and it works.Is the a fusible link for the power.There is no fuse I can find. A blower motor resistor is an integral part to your heating and cooling system and its ability to be adjusted to your preference. The blower motor is a D/C electric motor driven by varying current supplied by the blower motor final stage unit. Yes, you can run the blower full speed with direct power. I bench tested the blower and it worked fine. This will allow you to pull the blower resistor down and disconnect the wires. How does the heater blower motor resistor work? Ford blower motor resistor problems remain the most common solution to interior fan malfunctions on Ford cars and trucks. All you need is a 7/32 inch socket and a ratchet. The blower motor resistor (located on top of the heater core housing and behind the glove box) isn't hard to test. New Listing GENUINE FORD MOTORCRAFT BLOWER MOTOR RESISTOR MODULE W/ CONNECTORS YH-1827 (Fits: Ford) Brand New. However, it is susceptible to failure, which will affect the luxury of driving a BMW. The resistor is between the power source and the fan, and allows only the desired amount of power to go to the fan. I am having a problem with the blower motor resistor. 1 bid. C $63.69. Check for bad fuse or bad high speed relay. thanks. Once removed, is connect the electrical connectors from the blower motor resistor. The resistor block contains three different high resistance coils. The blower motor resistor is usually located in or right close to the blower motor Usually you'll notice that the switch feels looser than normal when you use it. Blower Motor Resistor - Sold individually, Blower Motor Resistor, Manual A/C Manufacturer #1712040 ( Reviews) Questions, Answers $29.29 You Save : $10.67 (27%) List Price : 39.96 More info From United States +C $20.08 shipping estimate . The interior fan is powered through two separate fuses and a blower motor relay. 6 people found this helpful. Replace the resistor. Remove the two screws that fasten the blower resistor in place. Passenger side airbag and dash cover $30 Blower motor resistor (makes ur heat work on all speeds not just high) $10 ABS Unit $20 A/C lines $5 each A/C Condenser $40 Turbo intercooler $40 All parts came off of a 2000 vw Jetta gls 1.8t $90.00 Blower Motor Resistor BMW 325i 325xi 328i 335d 335i 335is Z4 64116927090,64119265892 City of Toronto Featured. The air conditioning and heating controls allow you to switch fan speeds — and the blower motor resistor controls that speed once you select it. 2006 Dodge 2500, blower motor would only work on high speed. Usually, the wear that the blower motor resistor has is due to the constant use that it gets and the heat that it is exposed on a regular basis. How does this type of resistor work? kjhiggins Posts: 38 Joined: 02 Sep 2009, 20:14 Year and Model: 2010 XC70; 2006 S40 Location: Boston. Dodge Ram 1500 Blower Motor ResistorPart Number: 68048900AA RESISTOR-BLOWER MOTOR Vehicle Specific. 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