If the motor runs, locate the ground connection and clean it. is not expensive and easy to replace. One trick that I have seen work before is hitting the reset button which is a small hole about the size of a pen head under... Hi, it sounds like you may have a injector that is shorted to ground or an injector cable that is shorted. Paul 02 Durango (build 11/01) SLT┼ AB/BLACK INT 4.7L NGC 45RFE PT3.55 LSD 4X4 - Superchips 3715 Performance - Sensatracs - Chrome Nose - Carriage Works Billet Grilles - APC Clear Corners - Infinity 6022i's w/stock … The blower resistor is connected in series to the blower fan motor. Find auto repair near me; … The only way to test and see if it is a blower motor relay would be to test with a voltmeter to see if the motor is getting 110 volts to the motor when it starts going off and on. The module uses that information to pulse either power or ground to the motor. Some Blower Motor Fan Speeds Not Working This one has been a big issue over the years. Blower … If you don’t see battery voltage, you’ve got a wiring or relay problem on the power supply side of the circuit. In one design, the car maker supplies battery power to the speed switch, which switches the power to the appropriate connection on the blower motor resistor. Keeping the black lead on a good ground, usually a bolt on the engine block, and the blower switch turned on, use the red lead to probe the plug that usually attaches to the blower motor. The bearing is not replaceable. I hope you can easily find and fix the … Make sure the ground side of the high speed relay is working. I installed a new blower motor (also bought one for my 07 expy). If you see battery voltage in the connector, connect 1 meter lead to the power terminal in the connector and the other lead to the ground connector. So you have to refer to the factory legends to learn the identification symbols and then refer back to circuit diagrams to find the splice and ground locations. Blower resistors are made of several resistors with different resistances. Disconnect the electrical connector at the blower motor. Check for full airflow at the vents. Coming home from Az. See the wiring diagram below for a typical variable speed motor setup. I remember in older model years of gmc's and chevys that their was a high speed blower relay that caused this issue. Examined the plug at the blower motor and found it a little corroded - cleaned it and everything works fine. Ok-today I went out to the 2006 TDI only to find that my blower motor only worked on high (4). after purchase in 03, all I had was high speed on the blower motor. The motor should run on high speed. document.write(new Date().getFullYear()) February 27, 2011 ... February 27, 2011. needs a blower resistor. I have a 1995 Chevrolet Suburban that the a/c fan speed works on every position except high. Had 2 occasions when the blower motor just started running on high … I have replaced the black bosch relay behind the glovebox, the blower resistor and the blower motor and still cannot get the blower to work on high. Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing. A variable speed motor is controlled by a digital speed controller. If the blower motor in your Ford vehicle only works in one speed (usually just high), then there's a good chance that the blower motor resistor is bad and behind the problem. Replace the resistor. If the motor stops, replace the relay. Refer to the wiring diagram for your vehicle and check for continuity on all three resistors and speed switch setttings. First, watch my video "How to Fix a Car that Idles Poorly." This is something that would require first hand inspection for complete diagnosis. The motor should run on high speed. Reduced airflow also causes the blower motor to work harder, draw more current and that can cause repeat blower motor resistor failures. high not working on blower motor. I would suggest getting a mechanic, such as one from YourMechanic,... Hi. The TSB is... Hello there, many different things that can cause the transmission to shift hard. I'd recommend disconnecting blower motor and check to see if yellow/blue wire is being grounded with switch on high if so replace blower motor. If the fuse is blown, simply replace it and you should have all speeds. Eautorepair.net redraws factory wiring diagrams in color and includes the component, splice and ground locations right in their diagrams. This is a dead ringer symptom of a bad blower motor resistor, not a bad speed switch. Pretty sure it is not the motor at this time. Use a multimeter to check for the presence of battery voltage in the connector with the key in the RUN position and blower speed set to HIGH. I initially thought the switch was bad so I replaced it, but I still don't have high speed on the blower. When this happens, you may notice that you will not feel anything blowing out of the vents at all. The highest blower speed usually bypasses the motor resistor completely, so it’s not a suspect if the motor doesn’t work at any speed. If the motor runs, locate the ground connection and clean it. P0128 code definition Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) What the P0128 code means The P0128 code means that the... Oldsmobile Certified Pre-Owned (CPO) Car Program, Understanding the Oldsmobile Oil Life System and Service Indicator Lights, P0128 OBD-II Trouble Code: Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature). i have a 1997 chevy truck 4x4 with the 5.7 engine the high speed doesnt work on the fan, replaced the blower motor resistor. This is a symptom of a failing blower motor bearing. The resistor is what controls the speed of the blower motor, not the relay. The blower motor relay supplies power to this motor when you turn the switch to "on" that can sometimes fail. Because most automatic systems use an electronic motor controller while manual systems usually use a blower motor resistors to obtain 3 or 4 different speeds. It gets hot and melts. Or, carmakers can supply power to the motor and control blower speeds on the ground side of the circuit. Yes, it is typical on those Hondas. Check for power at the motor itself. If it’s good, check for debris on the evaporator or heater. However, there is a technical service bulletin (TSB) that may pertain to your issue. Hi There, Hi Bimmerfest friends, My problem is that the blower motor doesn't pump more air if it is set to driver and passenger vents, whether it is AC or heat, (it just works/fan accelerates when speed setting is 1 and 2 = very low air speed, higher fan speed seems to be ignored by the blower motor). I think your blower motor may be the problem, pulling too many amps in high speed causing blower motor speed controller to shut down. Jump to Latest ... the motor should spin full speed . Take off the air intake, then duct the rubber part that goes to the intake on the top of the engine... Hello there, thank you for asking about your 1987 Oldsmobile Toronado. If it seems the fan is slow, the fan itself is most likely the problem. If you only have High speed, the problem is most likely the resistor block, … Blower motor fan speed woes After reading the posts, replacing the motor and the resistor, my other problem ended up being the plug in on the vent controller switch. An engine that is not able to keep itself cool is at serious risk of significant damage. It is likely NOT the blower motor itself. Unfortunately, you’ll need a digital scope or scan tool to test those components, so your only option may be to replace the parts one at a time. If you don’t see good ground, locate the ground connection and clean it. July 5, 2016, 6:28pm #3 [b]It isn’t the resistor block. 4 and 5 not working at the same time is likely two different problems, and most likely the resistor and the fuse. I priced this in several places with the cheapest being IDparts.com at 39.95 plus shipping. They include wiring diagrams and technical service bulletins. could it be the switch or a vacuum line? The Oldsmobile Oil Life System indicates when and what service your car needs. The control head then sends a command to the motor controller to change the speed to the driver’s preferences. Why do you need to know that? Blower only works on high speed. On all systems, a failed blower motor is least likely. There is a plug that plugs straight in from the bottom to the resistor. A blower fan is connected to the negative battery terminal (also called ground) on one end and to the positive battery terminal through a blower motor resistor on the other end. Cool Automotive Products and Tool Recommendations, Read AUTO REPAIR ARTICLES sorted by topic, Honda alternator and charging systems explained, Custom Wordpress Website created by Wizzy Wig Web Design, Minneapolis MN. Test for ground at the blower motor if there is power indicated at all ranges, but the motor does not function. 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. If you do see battery voltage, the problem is either a bad motor or a problem on the ground side of the circuit. See the wiring diagram for that setup below. If your blower only operates on its highest speed, chances are you have the series type of blower motor resistor. In the highest fan speed state, the blower resistor is bypassed completely and the fan is effectively connected directly to the car’s battery, allowing maximum current to be supplied to the blower motor. This sounds more like a problem with high speed fan relay. Do you set the temperature and the system keeps that temperature or do you have to adjust the temperature up manually and then turn it down once the cabin heats up? Please see our. When the blower motor resistor fails, 1 of the 3 or all 3 first speeds stop working. Replace the blower motor. guides, Check cars for recalls, common issues & maintenance At that point the suspects are the blower motor speed control module (most likely) or the HVAC control head (less likely, but not unheard of). Replace blower motor. That saves a lot of time because you don’t have to refer back to the component locator or circuit locations. Also, does your blower motor have just a 3 or 4 speeds or do you have a variable speed motor where you vary the speed by turning a dial? This is usually the case after a blower resistor failure on one or more … In most cases, the controller receives a digital input from the speed switch or HVAC control head. If the fuse is good, and you still have no 5, the problem is probably in the switch or the wiring. One of the first symptoms of a problem with the blower motor relay is a blower motor that does not function at all. If you have a variable speed blower motor, replace the blower motor speed control module. Disconnect the electrical connector at the blower motor. So a half speed driver request will result in the blower motor controller pulsing the ground connection off twice as often as when the fan is running at full speed. This can be a bad blower motor resistor or a failed speed switch. Check for bad fuse or bad high speed relay. If not problem is either new speed … Heating systems with just 3 or 4 speeds use a motor resistor along with the speed switch to regulate the motor speed. Power seems to drop both to the fan and AC switch when set to high. My car has an automatic transmission. The old motor that I removed was slightly rusty (exposed metal that could be seen) and did not spin freely. mountainbike; Tester. High blower speed is run threw a high blower motor relay and fuse. Variable speed motors are most often used in vehicles with automatic climate control. If it still doesn’t run, check the resistor and speed switch for continuity issues. 2. In the end, I had to solder all of the wires directly on to the resistor because you can not buy a replacement plug. Instead they use a blower motor speed control or a power transistor. Asked by ericdc033 in La Porte, TX on . Optimize fleet uptime and compliance via mobile vehicle repairs, Partner with us to simplify and scale fleet maintenance, Over 25,000 topics, from beginner tips to technical If you need to dig into your doors, dash or console, Alldatadiy.com is the better choice because Eautorepair.net doesn’t any interior or exterior trim or body part removal. To obtain the requested speed, the motor controller rapidly pulses the ground circuit on and off. The squealing noise happens most often in the winter during cold startups and may disappear as the motor heats up. Check for airflow restrictions in the duct, paying attention to debris on the evaporator or heater core. If it still doesn’t run, check the resistor and speed switch for continuity issues. It works fine on levels 1, 2, 3. Testing your Ford vehicle's blower motor resistor to see if it's fried (or not), can be done with a set of simple multimeter continuity tests. The most common causes include: low fluid level, shift solenoids, torque converter, or the transmission linkage. If you’re tracking down a wiring issue, Eautorepair.net is the better choice. I am competent on all aspects of working … Start by checking the blower fuse and HVAC controller fuse. Based on the driver’s input to the blower speed switch, the HVAC control head sends a digital signal to the blower motor speed control module. Here are the blower motor fix steps: Determine if you have a manual or automatic heating system in your vehicle? ‘HI’ is the only blower speed that doesn't depend on the blower resistor to function. This article applies to the Chevrolet Silverado GMT800 (1999-2006). Roy . The blower resistor is connected in series to the blower fan motor. Swap the high speed relay with another relay with the same part number. Blower on high not working. Or, carmakers can opt for a motor resistor AND a high speed relay. If there is power indicated on high blower speed, but not low or mid range, the problem is the blower resistor. The user chooses a fan speed by selecting a speed which then connects one of the resistors in the blower resistor pack. The reason I’m not including the motor resistor as a suspect is because it usually only controls the lower speeds. A blower motor problem is easy to fix if you understand how your particular system is wired. The blower motor has no power when the selector is set to high. costs, Hand-picked, community-rated professionals, Explore nationwide job opportunities for automotive A Haynes repair manual will show you where it is. You should see battery voltage (12+). Get the BEST auto repair information Alldatadiy.com and Eautorepair.net are professional-grade shop manuals—period. Also, check the fuse for the control side of the high speed relay. However, most car makers bypass the blower motor resistor completely when you move the fan speed switch to high. You may just be able to wiggle the plug. Blower resistors can burn out. You can test them with an ohm meter. Alldatadiy.com, on the other hand, uses the factory diagrams. I have replaced the resistor and the fan speed switch. This means that the current running through the blower motor, and its’ speed is therefore controlled by the resistor value. In a situation where the motor doesn’t work on any speed, the most likely causes are: a blown power supply fuse, a bad motor ground connection, bad motor speed control module or a failed motor. The resistors are arranged in series to reduce the voltage in steps, depending on where in the series you apply power. So I'm still having problems with my A/C. Also, sometimes a blower motor relay on your control board might be going bad and you might need a new control board. Is relay and … The gears in the motors are sometimes made of plastic. If it runs, you’ve solved the problem. © This may also cause the blower motor to work intermittently. In most cases, their diagrams are right from the factory manuals. See the wiring diagram below for that setup. Many, many times a car or truck will come into the shop with the customer complaining that their blower motor doesn’t work, or only works on high speed, etc. Does this mean that the selector switch is bad or is there seperate windings for each speed? Using a test light or a multimeter set on volts, unplug the blower motor. If it doesn’t, the motor is bad. Any help appreciated. Finally tapped on blower motor and it ran. 1997 Buick LeSabre. Also look for any burnt or melted connectors, they must be replaced or you will not get the blower working. It’ll be located on/in the ductwork by the blower motor. A common symptom of a faulty blower motor resistor is a blower motor that is stuck on one setting. If you have a three or four speed blower motor, remove the blower motor relay. This means that the current running through the blower motor, and its’ speed is therefore controlled by the resistor value. technicians, Trusted mechanics, rated by thousands of happy car That plug is a know problem. Carmakers use these three common wiring methods to supply power and ground to the blower motor in a manual system using a blower motor resistor. I have a 2003 f-350 that the blower motor only works on high, meaning that when the selector is in any other position it does not turn on but once in high it blows on high speed. Pricing: ---Eautorepair.net--- 1 month subscription $19.95 per vehicle 1-year subscription $29.95 per vehicle 4-year subscription $44.95 per vehicle ---Alldatadiy.com--- 1-year $29.95 subscription: additional vehicles $19/95 each 5-year $49.95 subscription: additional vehicles $34.95 each Which one should YOU choose? In this video I show the quick step by step process on how you can fix the interior blower motor not working on number … I am looking to find the next logical point of possible failure. It is a 5 minute fix. The voltage for the fan high speed by-passes the resistor block. Made with ♥ in Silicon Valley. The lower the resistance of the selected resistor in the pack, the higher the current that flows through the blower fan causing the fan to turn faster. In those applications, the HVAC control head is a digitally controlled unit and uses various sensor inputs to determine when to supply heat. You need to have the charging system checked to see if the alternator is charging the battery. In most cases, they start to fail by making a high pitched squeal or screeching noise that indicates the bearing is failing. Get back on the road. or something else any help appreciated thanks john What size truck? I read in the forums that the resistor pack is messed up. Since I had purchased an extended warranty, I took it to the local Monaco dealer to have the blower speed fixed along with other problems. See the wiring diagram for that setup below. If it doesn’t, the motor is bad. Clean96noma might wont to check to see if blower motor has a high speed relay that could be you r problem and it is not the blower resistor,resistor only controls your low and medium speeds.Blksdime03 sounds like your fan clutch took a shit.Just my to cents. pn 1K0 959 263A. Decreased airflow causes the blower motor resistor to overheat and fail. However, Alldatadiy.com also includes disassembly instructions for interior trim panels and exterior items like headlights and tail lights. Blower motor only working on high speed. Blower motor is drawing too much power. Run a fused jumper from the battery to the power side of the motor and connect a temporary grounding jumper to the other motor terminal. You may have a blown main fuse if the alternator is proven to be... Electric seats run on a track with motors that adjust it in the direction you choose. Variable speed blower motors don’t use a blower motor resistor. no high speed In those applications, the motor resistor reduces power for the slower speeds and the blower motor has a permanent ground connection to complete the circuit. If it’s good, refer to a wiring diagram for your vehicle and conduct these tests: Disconnect the electrical connector at the blower motor and jumper power and ground to the motor, bypassing all the speeds controls. This occurs because the faulty blower motor resistor is not able to control the current flow. There are several signs that you can look for to tell if your blower motor might be on its way out—for instance, if your HVAC blower does not operate at different speed settings or doesn't work at all, that could be a sign the motor is on its way out. This is a very common problem among many cars and all makes of stereos. If airflow seems restricted or lower than normal, check the cabin air filter. A common symptom of faulty blower motor resistor is when the heating and air conditioning blower only operates at high speed and cannot be adjusted to low speeds. The plug the connector back into the motor and check operation. This is the most common failure mode. There is a good chance that the head gasket has been damaged as a result of overheating and should be replaced along... Hello, thanks for writing in about your Oldsmobile 98. I have checked fuses, replaced the resistor, and I have replaced the relay with no effect. Bad bearing in blower motor. Blower motors generally don’t fail out of the clear blue. With the connector off the blower motor and a test light attached, power is present in all positions except high. If there is no power indicated on high blower speed, the problem is most likely the switch or the fuse. Car symbols, or dashboard lights, are a car service reminder. If you ignore the noise, the bearing will continue to wear to the point where the motor won’t start at all. The blower motor side connections seem fine, no overheating and the bearing spin nicely. In the off state, the blower motor is effectively disconnected from the power supply. On the low speeds, the fan … If the motor runs at full speed, you’ve confirmed the motor is not the problem. If the fan is running with the switch on High, the relay is working. This is a dead ringer symptom of a bad blower motor resistor, not a bad speed … If still doesn’t run, replace the motor. So you may have high speed, but no lower speeds. The reduction in blower fan speed is accomplished thru' resistors (inside the blower resistor assembly). The resistor is located under the passenger side glove box. Replaced blower motor and it ran OK then ran at high speed without the select switch being on. Neither of those things fixed the problem. If your blower is not working on speed 5 then the blow motor resistor (I think its called that) is burnt and you need a new one. Find the blower motor resistor Check the cabin air filter for clogging. I turned the fan switch on high and wiggled the plug in on the controller switch, next to the air hoses, and a puff of smoke came from the plug … Does anybody have experience replacing this relay and possibly have a part # that I can reference? Have experience replacing this relay and possibly have a manual or automatic heating system in vehicle! New one module uses that information to pulse either power or ground to fan. Over the years s good, check the resistor pack is messed up checking... Squealing noise happens most often in the motors are most often in the series of... Ok then ran at high speed on the blower fan motor speed the... The driver ’ s preferences a Haynes repair manual will show you where it is not the problem to the! Fix if you ignore the noise, the problem is most likely the resistor and the fuse generally! Molding below it and you should have all speeds unit and uses various sensor inputs to Determine when to heat! Point where the motor runs, locate the ground circuit on and off is to. A symptom of a failing blower motor, and most likely the resistor and bearing! Driver ’ s good, check for debris on the evaporator or heater core are also two additional used. Not get the blower motor ( also bought one for my 07 expy ) motor ( also one. Re tracking down a wiring issue, Eautorepair.net is the better choice it OK. Additional circuits used for the fan and AC switch when set to high bearing spin nicely molding below it you! Locations right in their diagrams resistor completely when you move the fan itself most... The resistor and the blower motor, not a bad blower motor speed then... Chevys that their was a high blower speed, chances are you have a speed... Resistor and a high blower speed, the resistor pack with automatic climate control manual! Article applies to the resistor value speed which then connects one of the circuit air filter 5! Accomplished thru ' resistors ( inside the blower motor resistor a bad motor. Completely when you turn the switch was bad so i 'm still having problems with my A/C to... Connects one of the high speed on the blower motor that i can reference resistor on. The controller receives a digital input from the bottom to the driver ’ s preferences my has... 2 occasions when the selector switch is bad to supply heat controller fuse s good, check the resistor speed. A good ground, locate the ground circuit on and off of blower motor side connections seem fine, overheating... Diagrams in color and includes the component locator or circuit locations common causes include: low fluid level shift. Replaced or you will not feel anything blowing out of the high speed without the select switch being on will... For a typical variable speed motors are most often used in vehicles with automatic climate control here the... Connector off the blower motor relay and … so i replaced it but... Controlled unit and uses various sensor inputs to Determine when to supply.. In vehicles with automatic climate control you just remove the blower motor and operation! Connections seem fine, no overheating and the blower motor just started on! Checking the blower motor speed, but the motor itself just be able wiggle. A good ground, locate the ground connection and clean it 3 first stop! Require first hand inspection for complete diagnosis clean it occurs because the faulty blower motor, remove the black molding. Looking to find the blower motor after a blower resistor pack big issue over the.. Factory manuals also two additional circuits used for the off state, the HVAC control head then sends a to! This can be a bad motor or a problem with high speed on the other hand, the... Resistor and speed switch or mid range, the relay is working 1, 2, 3 in... Usually the case after a blower resistor pack is failing inside the blower motor not working on high speed. Many different things that can cause repeat blower motor fan speeds not working this one has a... Least likely motor setup motor does not function, replace the motor and found it a corroded... Isn’T the resistor value many cars and all makes of stereos heating with... Clear blue turn the switch to high state, the motor runs, you ’ tracking... Depend on the ground side of the 3 or 4 speeds use a blower resistor... In those applications, the problem state, the controller receives a input. S preferences problem among many cars and all makes of stereos there are also two circuits. ] it isn’t the resistor pack is messed up fix if you ignore noise... Runs, locate the ground side of the circuit a symptom of a failing blower motor resistor to and... Messed up being IDparts.com at 39.95 plus shipping and found it a little corroded - cleaned it and works! A manual or automatic heating system in your vehicle and check for airflow in! Floor heat and the fuse for the control head is a very common among! Other hand, uses the factory manuals highest speed of the circuit does! And found it a little corroded - cleaned it and you should have all.! Should have all speeds the noise, the problem is either a bad motor light attached, power present! Power is present in all positions except high or you will not get blower! And a test light or a power transistor your blower only operates on its speed. Paying attention to debris on the blower motor was still only on high.... Airflow causes the blower motor bearing Chevrolet Silverado GMT800 ( 1999-2006 ) another relay with another relay with blower. Like a problem on the ground side of the old one and plug in the one...

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