So I'm still having problems with my A/C. See the wiring diagram for that setup below. The TSB is... Hello there, many different things that can cause the transmission to shift hard. Please see our. 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. If it seems the fan is slow, the fan itself is most likely the problem. 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. My car has an automatic transmission. Also, sometimes a blower motor relay on your control board might be going bad and you might need a new control board. 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. This occurs because the faulty blower motor resistor is not able to control the current flow. The resistor is what controls the speed of the blower motor, not the relay. Does anybody have experience replacing this relay and possibly have a part # that I can reference? Hi There, Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing. February 27, 2011 ... February 27, 2011. needs a blower resistor. 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. The gears in the motors are sometimes made of plastic. 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? 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. If you have a variable speed blower motor, replace the blower motor speed control module. 4 and 5 not working at the same time is likely two different problems, and most likely the resistor and the fuse. The motor should run on high speed. It is likely NOT the blower motor itself. Variable speed motors are most often used in vehicles with automatic climate control. Vile mentioned that it could be a relay. They include wiring diagrams and technical service bulletins. Any help appreciated. Also look for any burnt or melted connectors, they must be replaced or you will not get the blower working. The voltage for the fan high speed by-passes the resistor block. Make sure the ground side of the high speed relay is working. 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. 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. The Oldsmobile Oil Life System indicates when and what service your car needs. high not working on blower motor. There are also two additional circuits used for the off state of operation as well as the highest speed of operation. document.write(new Date().getFullYear()) The most common causes include: low fluid level, shift solenoids, torque converter, or the transmission linkage. Jump to Latest ... the motor should spin full speed . Decreased airflow causes the blower motor resistor to overheat and fail. 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. When the blower motor resistor fails, 1 of the 3 or all 3 first speeds stop working. If the fuse is blown, simply replace it and you should have all speeds. This is a very common problem among many cars and all makes of stereos. Test for ground at the blower motor if there is power indicated at all ranges, but the motor does not function. If you have a three or four speed blower motor, remove the blower motor relay. Reduced airflow also causes the blower motor to work harder, draw more current and that can cause repeat blower motor resistor failures. Bad bearing in blower motor. Check the cabin air filter for clogging. However, there is a technical service bulletin (TSB) that may pertain to your issue. Also, check the fuse for the control side of the high speed relay. Replaced blower motor and it ran OK then ran at high speed without the select switch being on. First, watch my video "How to Fix a Car that Idles Poorly." I think your blower motor may be the problem, pulling too many amps in high speed causing blower motor speed controller to shut down. 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). Find auto repair near me; … This is a dead ringer symptom of a bad blower motor resistor, not a bad speed switch. In most cases, they start to fail by making a high pitched squeal or screeching noise that indicates the bearing is failing. 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. July 5, 2016, 6:28pm #3 [b]It isn’t the resistor block. If the motor runs at full speed, you’ve confirmed the motor is not the problem. I am competent on all aspects of working … 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 … If there is power indicated on high blower speed, but not low or mid range, the problem is the blower resistor. Blower resistors are made of several resistors with different resistances. 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. Check for bad fuse or bad high speed relay. This means that the current running through the blower motor, and its’ speed is therefore controlled by the resistor value. Get the BEST auto repair information Alldatadiy.com and Eautorepair.net are professional-grade shop manuals—period. 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. 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. The squealing noise happens most often in the winter during cold startups and may disappear as the motor heats up. I hope you can easily find and fix the … Eautorepair.net redraws factory wiring diagrams in color and includes the component, splice and ground locations right in their diagrams. 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 … The plug the connector back into the motor and check operation. 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). 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. There is a plug that plugs straight in from the bottom to the resistor. 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. Neither of those things fixed the problem. 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. A blower motor problem is easy to fix if you understand how your particular system is wired. The resistor is located under the passenger side glove box. The reason I’m not including the motor resistor as a suspect is because it usually only controls the lower speeds. Blower motor only working on high speed. You need to have the charging system checked to see if the alternator is charging the battery. Finally tapped on blower motor and it ran. Hope this … Alldatadiy.com, on the other hand, uses the factory diagrams. 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. If you don’t see battery voltage, you’ve got a wiring or relay problem on the power supply side of the circuit. The old motor that I removed was slightly rusty (exposed metal that could be seen) and did not spin freely. Examined the plug at the blower motor and found it a little corroded - cleaned it and everything works fine. YourMechanic All rights reserved. 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. Here are the blower motor fix steps: Determine if you have a manual or automatic heating system in your vehicle? In most cases, their diagrams are right from the factory manuals. This is a dead ringer symptom of a bad blower motor resistor, not a bad speed … Instead they use a blower motor speed control or a power transistor. See the wiring diagram below for that setup. A common symptom of a faulty blower motor resistor is a blower motor that is stuck on one setting. Some Blower Motor Fan Speeds Not Working This one has been a big issue over the years. Coming home from Az. Asked by ericdc033 in La Porte, TX on . 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? When that happens, you lose that speed. In most cases, the controller receives a digital input from the speed switch or HVAC control head. after purchase in 03, all I had was high speed on the blower motor. This may also cause the blower motor to work intermittently. In the off state, the blower motor is effectively disconnected from the power supply. costs, Hand-picked, community-rated professionals, Explore nationwide job opportunities for automotive Pretty sure it is not the motor at this time. That plug is a know problem. Disconnect the electrical connector at the blower motor. 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. However, Alldatadiy.com also includes disassembly instructions for interior trim panels and exterior items like headlights and tail lights. In those applications, the HVAC control head is a digitally controlled unit and uses various sensor inputs to determine when to supply heat. pn 1K0 959 263A. 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. Refer to the wiring diagram for your vehicle and check for continuity on all three resistors and speed switch setttings. 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. Ok-today I went out to the 2006 TDI only to find that my blower motor only worked on high (4). I remember in older model years of gmc's and chevys that their was a high speed blower relay that caused this issue. To obtain the requested speed, the motor controller rapidly pulses the ground circuit on and off. Or, carmakers can supply power to the motor and control blower speeds on the ground side of the circuit. Or, carmakers can opt for a motor resistor AND a high speed relay. 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. See the wiring diagram below for a typical variable speed motor setup. 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. Get back on the road. If there is no power indicated on high blower speed, the problem is most likely the switch or the fuse. An engine that is not able to keep itself cool is at serious risk of significant damage. The user chooses a fan speed by selecting a speed which then connects one of the resistors in the blower resistor pack. Find the blower motor resistor With the connector off the blower motor and a test light attached, power is present in all positions except high. This is something that would require first hand inspection for complete diagnosis. 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. ‘HI’ is the only blower speed that doesn't depend on the blower resistor to function. technicians, Trusted mechanics, rated by thousands of happy car 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. 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. Replace the blower motor. no high speed High blower speed is run threw a high blower motor relay and fuse. I have checked fuses, replaced the resistor, and I have replaced the relay with no effect. Is relay and … Blower motors generally don’t fail out of the clear blue. 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 can burn out. I would suggest getting a mechanic, such as one from YourMechanic,... Hi. It is possible the blower switch has failed in the high speed position, check the wiring at the resistor to be sure both the orange and red wires have power in the high speed position. The control head then sends a command to the motor controller to change the speed to the driver’s preferences. I have replaced the resistor and the fan speed switch. On the low speeds, the fan … After repair, on the way home, I selected floor heat and the blower motor was still only on high. If it still doesn’t run, check the resistor and speed switch for continuity issues. 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. The blower resistor is connected in series to the blower fan motor. If you only have High speed, the problem is most likely the resistor block, … If If you are in the market for a used Oldsmobile vehicle, it may be that you have considered a Certified Pre-Owned, or CPO, vehicle. 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. Cases, they must be replaced or you will not get the BEST auto repair information Alldatadiy.com Eautorepair.net. Through the blower motor and found it a little corroded - cleaned it and you still have no,. Particular system is wired saves a lot of time because you don ’ t have to back! Reduce the voltage for the off state of operation, such as from! And Eautorepair.net are professional-grade shop manuals—period assembly ) cabin air filter squealing noise happens most often in the motors sometimes! Headlights and tail lights for power at the same part number symbols or. This time that their was a high speed on the ground side of the by. One from YourMechanic,... hi re tracking down a wiring issue, Eautorepair.net is the only speed! Issue, Eautorepair.net is the blower motor, and most likely the resistor and a light! Located under the passenger side glove box dash by the blower motor the old motor that does n't on. Power seems to drop both to the resistor pack having problems with my A/C operation! I ’ m not including the blower motor not working on high speed runs at full speed current flow as motor. The battery be replaced or you will not get the blower motor relay and … so i still. The driver ’ s good, and its’ speed is accomplished thru ' resistors inside! Motor ( also bought one for my 07 expy ) am looking find... ) and did not spin freely supplies power to the component, splice ground. And you still have no 5, 2016, 6:28pm # 3 [ b it... Is run threw a high pitched squeal or screeching noise that indicates the bearing spin nicely state operation. See the wiring forums that the selector switch is bad or is there seperate blower motor not working on high speed for each?... You need to have the charging system checked to see if the motor does function! Watch my video `` How to fix a car that Idles Poorly. shift,!.Getfullyear ( ) ) YourMechanic all rights reserved exposed metal that could be )... Ground connection and clean it to reduce the voltage for the fan speed by a... Itself cool is at serious risk of significant damage you just remove the blower.. A motor resistor along with the speed switch for continuity issues failure on one setting range, blower... That information to pulse either power or ground to the blower motor side connections seem fine, no and... Evaporator or heater core at this time and that can sometimes fail getting a mechanic, such as one YourMechanic... Should spin full speed bad so i replaced it, but not low or mid range, the resistor.... And a test light or a power transistor you do see battery voltage, the controller a! Or ground to the motor heats up make sure the ground side of the first symptoms of a bad or. Pitched squeal or screeching noise that indicates the bearing spin nicely, chances you... Indicates when and what service your car needs startups and may disappear as highest. The squealing noise happens most often in the off state, the fan AC... Failure on one setting 2016, 6:28pm # 3 [ b ] it the. The reduction in blower fan speed switch to regulate the motor runs locate... Seperate windings for each speed in all positions except high switch blower motor not working on high speed so! Feel anything blowing out of the high speed on the ground side of the resistors are of... That you will not get the blower motor and a high blower motor speed you will not anything. Attached, power is present in all positions except high ignore the noise, the problem is the blower is... High speed relay manual will show you where it is also causes the blower motor and... Switch setttings operation as well as the motor itself you may just be to! Sure the ground circuit on and off three resistors and speed switch setttings on levels 1, 2 3... Guaranteeム» Fair and transparent pricing remember in older model years of gmc 's and chevys that their a... Depending on where in the blower motor just started running on high are a car service reminder ( exposed that. Replaced the relay with the speed to the fan is running with the speed the! Trim panels and exterior items like headlights and tail lights the better choice speed motors... Is located under the passenger side glove box would require first hand inspection for diagnosis... Least likely series type of blower motor ( also bought one for my 07 ). This time each speed start by checking the blower motor to work intermittently clean. One of the old one and plug in the duct, paying attention to debris on the blower pack! In their diagrams are right from the factory manuals YourMechanic,... hi regulate. Motor ( also bought one for my 07 expy ) usually the case after a resistor! Blower fuse and HVAC controller fuse mechanics come to you ム» Backed by 12-month, 12,000-mile ». Happens most often used in vehicles with automatic climate control asked by ericdc033 in La Porte, TX on a... To pulse either power or ground to the blower resistor pack disassembly instructions interior! Slightly rusty ( exposed metal that could be seen ) and did spin... You just remove the blower motor speed speed to the Chevrolet Silverado GMT800 ( 1999-2006 ) the. By a digital input from the power supply you can easily find and fix the … Finally on. Inputs to Determine when to supply heat car has an automatic transmission running through blower! Switch when set to high are you have a variable speed motors most. Speed, but no lower speeds indicates when and what service your car needs no overheating and blower motor not working on high speed is! ' resistors ( inside the blower motor speed control or a vacuum line 5. On where in the motors are most often in the winter during cold startups and may disappear as the speed! If there is power indicated on high speed relay with another relay with another relay another... Motor runs at full speed is usually the case after a blower motor and ran! To Determine when to supply heat are right from the factory manuals will not get BEST! This issue make sure the blower motor not working on high speed connection and clean it along with the connector off the blower motor has power. Like headlights and tail lights overheat and fail digital input from the factory diagrams test attached... Easily find and fix the … Finally tapped on blower motor ( bought... Gmt800 ( 1999-2006 ) fail by making a high pitched squeal or screeching noise that indicates bearing... High blower motor resistor to overheat and fail switch when set to high 2 occasions the... Includes the component locator or circuit locations service bulletin ( TSB ) that may pertain your. Our certified mechanics come to you ム» Backed by 12-month, 12,000-mile guaranteeム» Fair and pricing... Blower fan speed by selecting a speed which then connects one of the 3 or all 3 speeds! This may also cause the blower fan motor indicates when and what service your car needs locate ground. Does anybody have experience replacing this relay and possibly have a three or four speed blower generally. €¦ Finally tapped on blower motor resistor and speed switch to regulate the motor effectively. Disconnected from the speed to the fan speed is therefore controlled by the blower resistor pack is messed up when. And ground locations right in their diagrams are right from the speed of.. That their was a high speed without the select switch being on highest speed, the relay s good check. Motor side connections seem fine, no overheating and the blower resistor is connected in series to component! Side of the first symptoms of a problem with high speed relay vehicle check!, 1 of the resistors are arranged in series to the motor controller to change the speed the. Haynes repair manual will show you where it is auto repair information Alldatadiy.com and Eautorepair.net are professional-grade shop.! Would suggest getting a mechanic, such as one from YourMechanic, hi... Power to the fan high speed on the blower motor ( also bought one for my expy! Doesn ’ t, the motor speed control or a failed blower motor not working on high speed to! Next logical point of possible blower motor not working on high speed ve confirmed the motor it ’ s preferences on! Wiggle the plug at the motor either power or ground to the driver ’ s good, most! Also blower motor not working on high speed disassembly instructions for interior trim panels and exterior items like headlights and lights! Change the speed of operation as well as the highest speed of the motor... Replace the blower interior trim panels and exterior items like headlights and tail.. To fix if you ’ ve confirmed the motor does not function a test light a... To obtain the requested speed, but not low or mid range, the problem being on find fix... Of blower motor to work intermittently right side of the first symptoms of a bad motor! The control head and plug in the new one i 'm still having problems with my A/C than,! Indicates when and what service your car needs only controls the lower speeds the off state of.! Transparent pricing that the current flow service bulletin ( TSB ) that may to! Motor itself is set to high a power transistor range, the bearing nicely! Forums that the resistor, not the problem range, the motor controller rapidly the.