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. Heater Blower Motor Resistor Auto Temp Controls … The way this circuit works is all on the ground side. The blower motor resistor is an electrical component that is a part of the vehicle's heating and air conditioning system. I bench tested the blower and it worked fine. This is why at the bottom of the article we include a 2008 F150 blower motor wire diagram. 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. The fuse was blown. Remove the two screws that fasten the blower resistor in place. Top. Blower motor works in some speeds, but NOT all speeds. The blower motor resistor (located on top of the heater core housing and behind the glove box) isn't hard to test. The coil resistance causes them to heat up, thereby reducing the amount of voltage that can flow to the blower motor. IT was nasty! thanks. You've conclusively ruled out the fan. I've found the fan will work on High only if the resistor's bad. Check for bad fuse or bad high speed relay. 1 people found this helpful. Is my problem the blower motor resistor. It’s then typically installed in the ductwork, near the car blower—either under the dash or under the hood. When the blower motor resistor fails, 1 of the 3 or all 3 first speeds stop working. 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, … This will allow you to pull the blower resistor down and disconnect the wires. The resistor is responsible for controlling air flow though the blower motor. Continuity check time just for good measure. kjhiggins Posts: 38 Joined: 02 Sep 2009, 20:14 Year and Model: 2010 XC70; 2006 S40 Location: Boston. 12 volts is always present at the motor, and the switch in your dash provides the ground. How does the heater blower motor resistor work? 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. Step by Step Instructions. The air conditioning and heating controls allow you to switch fan speeds — and the blower motor resistor controls that speed once you select it. New Listing GENUINE FORD MOTORCRAFT BLOWER MOTOR RESISTOR MODULE W/ CONNECTORS YH-1827 (Fits: Ford) Brand New. To gain access, the passenger's side lower insulator panel will first need to be removed. Motor ran fine. 9 product ratings - GENUINE FORD MOTORCRAFT BLOWER MOTOR RESISTOR MODULE W/ CONNECTORS YH-1827. 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. 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. The fan speed is normally one of the most adjusted features in … This will be based in part on motor requirements. Onward... ED7. A blower motor resistor is an integral part to your heating and cooling system and its ability to be adjusted to your preference. Yes, you can run the blower full speed with direct power. The motor itself is very low tech. Blower motor does not work on certain settings. Blower motor works in high-speed only. When a resistor coil burns out, you lose that fan speed. Replace the resistor. I have power from the switch to the blower resistor and from the resistor to the motor. It helps control the speed of the fan that pushes the conditioned air into the cabin. Tools & Materials. This can be annoying, but troubleshooting is easy. And the resistor is gonna get hot. The air conditioning and heating controls allow you to switch fan speeds — and the blower motor resistor controls that speed once you select it. In most cases, these resistors will wear out long before the car does. The resistor block contains three different high resistance coils. took the entire can! ‘HI’ is the only blower speed that doesn't depend on the blower resistor to function. 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. i believe it is but want to double check. Safety Glasses Nitrile Gloves Screwdriver Magnetic Bowl Blower Motor Resistor Instructions. It's located under the passenger's side dash, mounted near the blower motor. 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 The interior fan is powered through two separate fuses and a blower motor relay. Please narrow the Heater Blower Motor Resistor results by selecting the vehicle. The blower motor resistor (green arrow) (or final stage) varies voltage to the blower motor to achieve the desired speed. The blower motor resistor, when it goes bad, you'll start losing speeds on your blower. (Refer to a service manual to locate yours.) Noisy as can be, but works otherwise. The blower motor resistor is responsible for powering the blower motor directly. How does this type of resistor work? This is a dead ringer symptom of a bad blower motor resistor, not a bad speed switch. Here are the details about it & signs of its failure, and ways you can fix the blower motor resistor. BWD® offers over 700 blower motor resistors as high-quality replacements that match the OE to ensure top performance. Remarkably, the blower works at all speeds now. The blower motor is a D/C electric motor driven by varying current supplied by the blower motor final stage unit. Mark helpful. Follow the wiring harness from the blower motor to the blower motor resistor. 10 people found this helpful. Another common symptom of a faulty blower motor resistor is a a blower motor that does not function on certain settings. For example, you might have speed one and four, but not two and three. View related parts. Appreciate it guys!! Brake cleaner worked on the blower wheel. 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. Think of these coils like a filament in a light bulb. Do not pull of any balance clips on the blower wheel. 2008 Santa Fe - Answered by a verified Hyundai Mechanic We use cookies to give you the best possible experience on our website. 4 Blower Motor Resistors found. This will make disconnecting the connector from the blower motor resistor block very difficult. Air flow is controlled using vents and the vents are altered by this resistor. 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. The blower motor resistor is designed to last for the car’s lifespan. Once removed, is connect the electrical connectors from the blower motor resistor. IF cleaning it, do not get the blower motor in any liquid. The resistor module is easy and inexpensive to replace. If you start at the blower motor, and check resistance in the circuit, you will find the problem … Also the ground point behind the passenger side kick panel could be bumming. This diagram shows how the blower motor resistor is connected in a typical car. I did notice that the power to the resistor and to the motor are constantly hot, don't know if that is normal. It is responsible for controlling the blower motor’s fan speed. Ford blower motor resistor problems remain the most common solution to interior fan malfunctions on Ford cars and trucks. 1 bid. C $63.69. Some 1994 Chevy/GMC pickups use this type of blower resistor. Post by kjhiggins » 12 Sep 2010, 04:34. I then checked the 30amp Batt3 fuse within the engine compartment. So if the resistor heats up, generally it's gonna burn the resistor out before it blows the motor. Re: Blower motor or resistor (controller) bad? With that said, failed blower resistor assemblies don't solve all of the possible failures. Here is the location of the blower motor speed control module (resistor) below. The resistor is between the power source and the fan, and allows only the desired amount of power to go to the fan. And when one or more of these resistors burn out, you’re usually left with only one heater blower motor speed—high. The most common symptom of a faulty blower motor resistor is a blower fan that only works on one speed, usually high. 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. That's why in some cars, the blower motor may still work in the "High" speed setting if the resistor is bad. All you need is a 7/32 inch socket and a ratchet. Hooked it up to a 12V battery. Swap the high speed relay with another relay with the same part number. It's very common for the resistor connector terminals to corrode or for the connector to burn and melt. Gently pull the blower resistor down and disconnect the wiring connector. 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. Dodge Ram 1500 Blower Motor ResistorPart Number: 68048900AA RESISTOR-BLOWER MOTOR Vehicle Specific. Mark helpful. It's pretty easy. Kinda blew me away because the corrosion was very minor. 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. Additional Resources. After seeing useful information above, removed resistor near blower motor and cleaned the minor corrosion from the back side. 5.0 out of 5 stars. I am having a problem with the blower motor resistor. 2006 Dodge 2500, blower motor would only work on high speed. However, it is susceptible to failure, which will affect the luxury of driving a BMW. There are a number of things that can render your heater blower motor resistor useless. From United States +C $20.08 shipping estimate . I went through a car wash the other day. 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