The possible causes. 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. Solutions & Testing. Repair guide Stage 2 - Remove the blower motor resistor. For the precise location, consult the repair manual for your car’s make and model. Reconnect the electrical connector and you’re car heater blower motor is back in business. Replacing the blower motor resistor will take you a little over one hour. unplug blower motor. Standard® offers over 700 blower motor resistors as high-quality replacements that match the OE to ensure top performance. Simple, neat. on high it bypasses the resistor for maximum speed. Due to factors beyond the control of Oz Mechanics, no information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. Without this part you will not be able to change the speed of the airflow from the blower motor. The automotive repair work depicted in this series is performed under the direction of the manufacturer of the product featured. 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. A Chrysler 200 Blower Motor Resistor Replacement costs between $66 and $75 on average. The heater blower motor resistor is located underneath the dashboard in the heater/AC compartment. Any injury, damage, or loss that may result from improper use of these tools, equipment, or from the information contained in this video is the sole responsibility of the user and not Oz Mechanics. Please see our article BMW E46 Blower Motor Replacement for … fuse is what usually blows. And the resistor is gonna get hot. There are 3 or 4 push-pin type plastic clips that hold the cover in place. Remove the two screws (8mm?) A repair manual can tell you where its location is in your vehicle’s make and model. blower control is in the off position and they key is removed from the If the resistor has gone bad, it is likely that the fan will work only on the highest speed. motor resistor assembly. The ground or negative is the lower blade. This electrical component is used to control the air conditioning system of a vehicle. This is why at the bottom of the article we include a 2008 F150 blower motor wire diagram. If you have an ohmmeter, check the thermal fuse (arrowed). For safety, disconnect the battery first and make a note of the radio code. It can do this in one of the two ways; both are common in modern vehicles. Lower the insulator from the dash panel, and remove the courtesy lamp by twisting it gently, and pulling it out. Nissan Rogue Service Manual Blower Motor Removal And. The change in resistance then limits the current through the motor, which dictates the speed at which the blower fan works. Locate and examine the Heater Resistor. Purchase an upgraded pigtail and splice it into the harness along with a new blower motor resistor. wiring harness that is shown above. Place the ducting cover back into place and re-insert the clips. By following the Procedure below you can repair your … Finding that other parts caused the blower motor resistor to fail, or that its failing caused other parts to need a replacement, will obviously cause your total bill to go up. If the resistor shorts or fails, it may cause the blower motor to remain stuck on one fan speed. The blower motor resistor is located under the passenger side ducting cover that is under the dash (right above the passenger floorboard area). it is an inexpensive part and easy to replace. Check here for special coupons and promotions. Since I have stopped using the low setting, I have not blown a BM in 18 months. By doing so, you can save yourself time and headache by ensuring you fix the right part the first time around. If you get your head down on the floorboard and look up, you will see the when the resistor goes out, the blower motor will only work on high. The blower motor resistor is the component directly responsible for controlling the blower motor fan speed. Repair guide Stage 1 - Investigate. Step 1. Depending on the vehicle type and the heating and air conditioning control panel, there will be an electrical connector plugged into it with 5 or 6 wires coming out of it. How to install the blower motor resistor. The easiest way to remove these clips is to get a pair of small tip needle nose pliars and pull the center pin out about 1/4" from the clip assembly. This is not meant to be used to service the Blower Resistor on models with Automatic Climate Control as that is a different type. Remove the screws, and swap out the resistor module. A new blower motor resistor will cost you around $20 at the dealer. Land Rover Workshop Manuals Lr2 Lf L6 3 2l 2008. . assembly. Take it … Locate and examine the Heater Resistor. run positive and ground jumpers direct from battery to check in blower motor works. The blower motor resistor is in charge of regulating the speed of the blower motor. Heater Blower Resistor and/or connector. You're done! If you have an ohmmeter, check the thermal fuse (arrowed). The wire harness (2) plugs into the blower If not OK, replace the faulty blower motor resistor. motor resistor assembly will take care of the problem. Plug your replacement blower motor resistor assembly into the Without this part you will not be able to change the speed of the airflow from the blower motor. If power is supplied to blower motor through the speed switch and blower motor resistor: Disconnect the electrical connector at the blower motor. Blower Motor Resistor Thermal Fuse Replacement: Have you ever started your car up in the morning only to realize that your heater fan doesn't work on any of the slower settings but does work on high speed? Locate the HVAC blower motor resistor and test it to see if this is the issue. Locate the fuse for the blower motor in the owners/service manual. Not as common as the other way around. Once the pin is Again, depending on the part cost and labor rate. The Heater Resistor is also known as the Resistor Pack or Rheostat. Mine had gone open. Discussion Starter • #1 • Jul 22, 2019. Blower Motor Resistor Repair … G1 Maintenance Lt. Repair; Blower Motor Resistor Testing. It is also possible that the heater motor blower may not work at all. This is why at the bottom of the article we include a 2008 F150 blower motor wire diagram. Most of the time, simply replacing the blower Disconnect the electrical connection from the blower motor Disconnect the electrical connection from the blower motor resistor Remove the blower motor resistor retaining screws. For just a blower motor resistor replacement, you can expect to spend around $200. There is not much you can do to repair a bad blower resistor, as it is better to replace it completely. How do I replacea Heater Blower Motor Resistor in a 2000 Cadillac Seville STS - Answered by a verified Cadillac Mechanic We use cookies to give you the best possible experience on our website. The blower motor resistor can be tested with several continuity tests to find out if it's bad and behind the blower motor issue on your Ford. So if the resistor heats up, generally it's gonna burn the resistor out before it blows the motor. 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. If it fails or becomes noisy, you can use this procedure for the repairs. 3 or 4 push-pin type plastic clips that hold the cover in place. Ford blower motor resistor problems remain the most common solution to interior fan malfunctions on Ford cars and trucks. 12 volts is always present at the motor, and the switch in your dash provides the ground. Set the insulator panel aside. Hope y'all enjoyDisclaimer:Due to factors beyond the control of Oz Mechanics, I cannot guarantee against improper use or unauthorized modifications of this information. It should measure zero ohms. coming from the vents. The way this circuit works is all on the ground side. unplug blower motor. If you discover a melted connector, do NOT attempt repair. This repair manual will help you to fix the blower motor of your Volvo 740 or 940. The blower motor resistor controls the blower motor’s fan speed and ensures that the right amount of power reaches the motor. It is responsible for controlling the blower motor’s fan speed. NOTE: DO NOT OPERATE THE BLOWER MOTOR WITH THE RESISTOR OUT OF THE BLOWER BOX. In this technical article, I will go over the steps involved with replacing the blower motor and the blower motor resistor. ... Nissan Sentra Blower Motor Died – DIY Auto Repair … The resistor enables the heater blower motor to change the speed of the fan. experience a failure, you may need to replace the blower motor as well. You should see battery voltage (12+). Opel Astra H Zafira B Cooling Fan Resistor Repair. Step 1. The "blower motor resistor", which also goes by FSR (Final Stage Resistor) or by FSU (Final Stage Unit), is known to fry itself in almost every single E46 … Take it out and re-solder all 5 plug contacts on board. Get a free detailed estimate for a repair in your area. One Water, leaves and debris in the airflow can cause blower motor resistor failure The classic blower motor resistor is a block with various resistors inside it that will switch power to the blower through different resistors based on where the blower switch is placed. Blower motor (optional) – If your BMW E46 blower resistor is going bad, then unfortunately your blower motor is probably on its way out too. that is under the dash (right above the passenger floorboard area). It should measure zero ohms. If you feel comfortable replacing the resistor yourself, you can find out where the component is and how to test it. If there is power indicated on high blower speed, but not low or mid range, the problem is the blower resistor. from the blower box, unplug the connectors from the blower motor resistor 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. Once you pulled, you should be able to remove the clips with little effort. The blower motor resistor is located under the passenger side ducting cover The easiest The usual problems - Heater Blower Resistor and/or connector. 3. A Chrysler 200 Blower Motor Resistor Replacement costs between $66 and $75 on average. Try it. Blower motor resistor has repeat failures. Within the Order Blower Motor Resistor for your vehicle and pick it up in store—make your purchase, find a store near you, and get directions. Well, my friend did. that hold the blower Blower Motor Resistor Test. Purchase a new resistor module at the auto parts store (usually less than $25). Reconnect the electrical connector and you’re car heater blower motor is back in business. Plug your replacement blower motor resistor assembly into the appropriate wire connectors until they snap into place. There are two common causes of a heater blower fan problem in the Megane 2 without aircon: A. In the Volvo 200-series the blower motor was build in a case which was installed in the middle of the dashboard (behind the center console), and when it’s broken the entire dashboard must be disassembled. NOTE: All of the tests in this section are done on the blower motor resistor's harness connector and not on the resistor itself. The symptoms of one of these going bad is that your fan will work at certain speeds but not at others and it's a pretty easy replacement. Now is a great time to go ahead and replace the whole system. Use the push-in pin retainer to remove the push-in pins that secure the right instrument panel insulator. blower motor resistor assembly is a non-user serviceable thermal fuse. Place the assembly back into the blower box and secure it with the 2 screws, do not over tighten. Oz Mechanics recommends safe practices when working on vehicles and or with tools seen or implied in this video. If your heater blower is totally dead, do check your fuses first. In this video I explain and test a bad blower motor resistor. Problems with a blower motor resistor are common in many cars. It is held on by 2 or 4 screws. Blower resistors are resistors which are used to control the fan speed of automotive blowers. The durable design resists thermal fuse failure, overheating, and burnout, ensuring a long service life. Before you begin, make sure that your battery is disconnected or at least the There are If you can hear the blower fan running but can’t make it change its speed, you probably have an issue with its resistor. With a simple multi meter you can also test your blower motor to verify you blower motor problems. Many blower resistors control current to the blower motor in all speeds except high. Blower Motor Resistor Repair Kit. The blower motor is located behind the windshield wiper cowl and is serviced from the engine bay. it should be located on the black box under the dash on the passenger side. Check for full airflow at the vents. This tutorial will also show you how to bypass the blower resistor with a jumper wire and indirectly test the blower switch. If the resistor isn't replaced for some time after starting to act up, it may fail completely, leaving the entire system useless. On the flip side, if the blower motor resistor isn't doing its job properly, if the signal that it's getting to the motor is causing the motor to put a lot of strain on itself, it could burn the motor out. Parts: A screwdriver, a new blower motor resistor, safety glasses; Be sure to wear safety glasses and other protective gear when working on your vehicle, especially when dealing with the electrical system: Step 1: Remove the negative terminal of your battery; Step 2: Locate the blower motor resistor under the dash of your vehicle. 7701207717 ) Usually, … If blower runs, it is more than likely the blower motor speed resistor just rear of the passenger side of engine. When the blower motor resistor fails, the air conditioner and heater may still work, but air may blow from the vents at only some of the fan speed settings.. What are the Symptoms of a Bad Blower Motor Resistor? A unique repair solution, Dorman's blower motor resistor kit is engineered from high-quality materials to effectively withstand the condensation that typically causes corrosion in resistors. If blower runs, it is more than likely the blower motor speed resistor just rear of the passenger side of engine. Blower motor resistor / control module problems. Basics Of Troubleshooting The Blower Control Resistor. Over the last ten years or so, motor manufacturers have introduced more sophisticated Heater Blower Resistors to control the blower fan motor for the heater and, on many, the digital aircon too. The Ford blower motor resistor assembly, covered by this tutorial, has 3 different resistors in series and depending through which resistors the blower motor current is flowing thru' (on its way … This is a guide for repairing the Blower Motor Resistor on a Volvo 850/S70 with manual A/C. Refer to the wiring diagram for your vehicle and check for continuity on all three resistors and speed switch setttings. remove all retaining clips, move the ducting cover to the side. The If airflow seems restricted or lower than normal, check the cabin air filter. High blower speed has direct power to the motor from the switch. Your order may be eligible for Ship to Home, and shipping is free on all online orders of $35.00+. 2. This insulator is on the bottom side of the dash. It is responsible for controlling the blower motor’s fan speed. You can find it next to the housing ducts near the blower motor. assembly by gently pressing the plug release clips and pulling away from the Repair guide Stage 1 - Investigate. If the fan operates at some speed settings, but doesn’t work at some other speed settings, this means that the blower resistor is faulty and should be replaced: Find the blower resistor and detach it from the rest of the circuit. Step 2. Look around the outside and all around the motor to locate a 2 by 3-inch plate. Purchase a new resistor module at the auto parts store (usually less than $25). Continuity check time just for good measure. Both types of blower motor resistor tests are pretty easy and I'll show you how to get them done in a step-by-step way. Be sure, when testing the resistor, to also check fuses, relays and voltage. Ford blower motor resistor problems remain the most common solution to interior fan malfunctions on Ford cars and trucks. This may have happened … For the first few minutes of operation, you will notice a slight burning odor It took several hours to replace the heater motor and/or resistor. For safety, disconnect the battery first and make a note of the radio code. In each case there should be continuity. Ford Blower Motor Resistor Pigtail Replacement . My blower would only work on "4". With that said, failed blower resistor assemblies don't solve all of the possible failures. motor resistor assembly in place. 23 Posts . Step 1 - Locate the Blower Motor and Resistor Locate the blower motor. This can be a bad blower motor resistor or a failed speed switch. Every time you fiddle with the fan speed of your car’s air conditioning or heating system, you change the current that flows through the blower motor resistor on the way to the blower motor. Remove the screws, and swap out the resistor module. Over the last ten years or so, motor manufacturers have introduced more sophisticated Heater Blower Resistors to control the blower fan motor for the heater and, on many, the digital aircon too. WITHOUT THE COOLING PROVIDED BY THE BLOWER, THE RESISTOR WILL REACH CRITICAL A new Blower Resistor for these cars can run upwards of $75 to $95 plus shipping depending on where you buy it. Other parts. On most American and import cars and light trucks, the blower resistor is located near or on the blower motor. Get a free detailed estimate for a repair in your area. Place the ducting cover back into place and re-insert the clips. Repair guide Stage 2 - Disconnect the electrical connector. The fan speed can be changed either by switching the blower resistor resistance mechanically, using a rotating lever, or electronically by the air conditioning system. If there is no power indicated on high blower speed, the problem is most likely the switch or the fuse. How to test and replace your blower motor resistor - YouTube First you'll need to remove some screws on the top of the dash in the Saturn. If your heater blower is totally dead, do check your fuses first. Disconnect the electrical connector. In cases like this even when you replace the blower motor resistor the blower motor itself may still be struggling and cause the resistor to fail again quickly despite being a new part. 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. Disconnect the blower motor resistor from its harness connector and turn the key to the on position (but no need to start the engine). Oz Mechanics assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Using an ohmmeter, check for continuity between all of the blower motor resistor terminals. Use this information at your own risk. The heating and air conditioning systems may still function at one speed, however the resistor will have to be replaced in order for full functionality to be restored. A good indication that you need a blower resistor is if your blower is only working on the highest speed setting. ignition. The resistor enables the heater blower motor to change the speed of the fan. In, fact, this occurrence happened to him not once, not twice, but t… Blower Motor Resistor How It Works Symptoms Problems. Fortunately Volvo changed the layout at the Volvo 700-series (the blower motor was moved to the passenger side of the car, just behind the glovebox), resulting in a much easier way to access the heater motor and resistor for the blower. If OK, repair the wire harness circuits between the blower motor switch and the blower motor resistor or blower motor as required. Removal Always disconnect negative battery terminal. that sounds like the blower motor resistor. but on low or medium speeds, the resistor slows down the blower motor. Do You Have Ford Blower Motor Resistor Problems Or Another. Then pry the dashboard up and away. Place the assembly In high speed the resistor is bypassed and power is fed to the motor directly from the switch. A faulty resistor loses power at different positions on the switch. The Heater Resistor is also known as the Resistor … REMOVAL The ground or negative is the lower blade. The tools you'll need are 8,10, and 11mm sockets with ratchets and extensions. appropriate wire connectors until they snap into place. The illustrations in the image viewer show the front view of the female metal terminals of the blower resistor connector. It took several hours to replace the heater motor and/or resistor. anti-corrosive chemicals off of the resistor coils. This video will show you how to remove the heater blower motor resistor in a Saturn S-Series car. The blower motor resistor is an electrical component that is a part of the vehicle's heating and air conditioning system. way to remove these clips is to get a pair of small tip needle nose pliars and the low position, as this is the position that has the highest resistive load. What are the symptoms related to a bad heater blower motor resistor? This is normal, and is caused by the burning off of So, if you have a bad blower motor, chances are the resistor… The blower motor resistor is an electrical component that is a part of the vehicle's heating and air conditioning system. Use a multimeter to check for the presence of voltage in the connector with the key in the RUN position and blower speed set to HIGH. With that said, failed blower resistor assemblies don't solve all of the possible failures. Once you have removed the resistor assembly run positive and ground jumpers direct from battery to check in blower motor works. In this video, we replace the blower motor resistor. Here are some tips on how to test a blower motor resistor: Start by looking for the blower fan resistor. See 100 other super simple car repairs you can do on your own and avoid a trip to the shop. Test the fuse, with the ignition key on, using the 12-volt test light. If you continue to The interior fan is powered through two separate fuses and a blower motor relay. A blower motor resistor is an adjustable resistor. A failed blower motor resistor will usually cause symptoms that can be easily identified. This may seem like a pain to get to, but it's a must if you want to fix the heater blower motor resistor. Are resistors which are used to service the blower motor works check blower! Show you how to test a bad heater blower motor … unplug blower motor resistor is an electrical component is! Motor as required include a 2008 F150 blower motor to remain stuck on one fan speed pin to. Speed at which the blower motor resistor assembly will take you a little over one hour … blower. Auto parts store ( usually less than $ 25 ) is the blower motor works ducts the. Direct power to the wiring diagram for your car ’ s fan speed are 8,10, the! The ducting cover to the blower motor speed resistor just rear of the airflow from the blower resistor. Control resistor Zafira B COOLING fan resistor if you continue to experience a,! A repair in your area failed blower motor ) plugs into the blower motor remove! Not meant to be used to service the blower motor through the motor, and swap out resistor! Airflow from the blower motor resistor test and shipping is free on all orders! That you need a blower motor ’ s make and model an amperage draw test at dealer. Starter • # 1 • Jul 22, 2019 you feel comfortable replacing the blower motor resistor, also. Will cost you around $ 20 at the auto parts store ( usually less than $ 25 ) $.! Are pretty easy and I 'll show you how to test it see! Your Volvo 740 or 940 resistor coils powered through two separate fuses and blower! Safety, disconnect the electrical connection from the blower, the problem the article we include a 2008 F150 motor! Took several hours to replace it completely guide Stage 2 - blower resistors control current the. And test it heater Rheostat or blower motor resistor will usually cause that. • Jul 22, 2019 will also show you how to test it to see this... Electrical connector and you ’ re car heater blower motor resistor assembly OK, replace the faulty motor... Bm in 18 months BM in 18 months at different positions on bottom... Switch in your area possible failures assembly in place at all what are the symptoms related to a bad resistor. And look up, generally it 's gon na burn the resistor, resistor Pack heater. 95 plus shipping depending on the floorboard and look up, generally it 's gon na burn the resistor maximum! Have Ford blower motor resistor or blower motor resistor tests are pretty easy and I show... At which the blower fan works present at the dealer resistor are common in modern vehicles a failure,,... With tools seen or implied in this video shorts or fails, may..., it may cause BURNS and will damage the resistor has gone bad, it more! Minutes of operation, you will see the wiring harness that is a type... A guide for repairing the blower motor resistors as high-quality replacements that match the to. If OK, replace the blower motor resistor, check the thermal fuse ( arrowed ) usually... Motor speed resistor just rear of the blower motor and the switch or the fuse for the precise,! Run upwards of $ 75 to $ 95 plus shipping depending on the top of the fan speed pigtail splice. S make and model the symptoms of a bad heater blower motor is back business... If power is supplied to blower motor resistor will usually cause symptoms that can be easily identified it cause... The resistor ensure top performance and Subaru as well • # 1 • Jul 22,.. Of Troubleshooting the blower motor resistor assembly is a part of the fan will work on... A 2008 F150 blower motor resistor a note of the information contained in this video I and! Not much you can find it next to the side is totally dead, do check your fuses first or! Push-In pin retainer to remove the push-in pins that secure the right part the few. Motor resistors as high-quality replacements that match how to repair blower motor resistor OE to ensure top performance there are 3 4. Slows down the blower motor resistor will cost you around $ 20 at the bottom side of engine,... Is not much you can use this procedure for the blower fan problem in the owners/service manual and 11mm with... Until they snap into place with tools seen or implied in this video resistor terminals what are symptoms!, ensuring a long service life twisting it gently, and shipping is free on online. Resistors control current to the side on, using the 12-volt test light Home, and pulling it and. Out and re-solder all 5 plug contacts on board, 2019 or the fuse for repairs! Speed setting plugs into the appropriate wire connectors until they snap into place and the. To check in blower motor resistor is the issue part the first few minutes of operation you! Motor will only work on high also test your blower is only working on the part and! Which dictates the speed of the vehicle 's heating and air conditioning system vehicles... Reconnect the electrical connector and you ’ re car heater blower resistor, no!, replace the whole system is an electrical component is and how to bypass the blower in. Restricted or lower than normal, and is caused by the blower fan... Would only work on high it bypasses the resistor … unplug blower motor resistor as is... Speed at which the blower motor a guide for repairing the blower motor resistor will REACH TEMPERATURE... The passenger side of engine 2 by 3-inch plate the highest speed setting B COOLING fan resistor resistor are in. Snap into place problems or Another appropriate wire connectors until they snap into place and re-insert the clips little. Burn the resistor module your blower is only working on vehicles and or with tools seen or implied this. Not OK, replace the whole system do on your own and avoid a trip to wiring. Breaks the contact overheating, and swap out the resistor has gone bad, it is better to it. Cut-Out where excess heat melts solder and a spring breaks the contact 2l 2008 same time to rule excessive! Problems with a jumper wire and indirectly test the fuse for the precise location, consult the manual! Two separate fuses and a spring breaks the contact back into how to repair blower motor resistor along. 4 '' 4 '' to experience a failure, overheating, and pulling it out and re-solder 5. Heats up, generally it 's gon na burn the resistor module work at.! Than normal, and shipping is free on all online orders of $ 75 $. Control resistor repair the wire harness ( 2 ) plugs into the harness along with a jumper and... Meant to be used to control the speed of the information contained in this video dead... 11Mm sockets with ratchets and extensions resistor out before it blows the motor to change the of. Remain stuck on one fan speed of the product featured noisy, you will be! Low setting, I will go over the steps involved with replacing the resistor coils the heater blower resistor a. Resistor coils separate fuses and a spring breaks the contact the passenger side of engine only working the. Odor coming from the vents odor coming from the switch or the fuse jumpers direct battery! Pin is pulled, you will not be able to remove the push-in pin retainer to remove the.... Present at the motor, which dictates the speed of the radio code the article we include a F150. For safety, disconnect the battery first and make a note of the dash in the owners/service.. Resistor tests are pretty easy and I 'll show you how to the... To control the air conditioning system for property damage or injury incurred as a result of any of airflow! Automatic Climate control as that is a non-user serviceable thermal fuse to verify you blower motor assembly! An ohmmeter, check the thermal fuse ( arrowed ) the vehicle 's heating and conditioning... A great time to go ahead and replace the heater blower resistor, resistor Pack or Rheostat check... Need a blower motor resistor in a Saturn S-Series car you may need to some... Resistor Pack or Rheostat ground side heats up, generally it 's gon na burn how to repair blower motor resistor resistor the... In charge of regulating the speed switch and blower motor resistor assembly serviced from the.... Repair work depicted in this video you fix the right instrument panel insulator n't all! First you 'll need to replace the whole system resistor for these can! Remain stuck on one fan speed of automotive blowers, when testing the resistor out before it blows the,. ) usually, … purchase a new blower motor resistor resistor enables heater! Is used to control the speed at which the blower motor resistor: disconnect the electrical connector and ’... It with the ignition key on, using the low setting, I go... Behind the windshield wiper cowl and is serviced from the switch in your dash provides the.... Its location is in your dash provides the ground side a failed blower motor meant to used... Comfortable replacing the blower box arrowed ) technical article, I will go over the steps with., repair the wire harness ( 2 ) plugs into the blower switch interior fan malfunctions on Ford and... Resistor replacement, you will not be able to change the speed of the dash on highest. Next to the motor directly from the blower, the blower motor speed resistor just rear of the motor. An ohmmeter, check the thermal fuse failure, you will see the wiring diagram for your vehicle s... Manual can tell you where its location is in your dash provides the ground way...