Blower Motor Relay Test


There have been cases where the final stage has kept the blower motor running while the ignition key is off, therefore draining the battery and leading to a "no-start" problem the next morning. 3) Set blower switch to LOW position. That's why, with a good switch, you might lose one blower speed yet have the others still working. When the blower motor does not respond at all, it may not be due to mechanical failure within the motor itself. Hvac blower motor relay test. Test your fan blower. Sometimes,not always,if you bump the blower motor,it will start working,if this happens,then the blower motor is bad,if it does not,the fan switch could be bad,but the relay is usally near the blower motor. There is a relay in the under hood fuse box , blower motor relay. If you want to test it use these instructions Honda-Element-Blower-Transistor. When the blower motor fails, see if the signal from the resistor goes. If it operates correctly, the issue will be resolved, and you can return to enjoying warm air forced through the ducts to heat your entire home. Testing the Voltage Output of the Blower Switch on the Heater Control Panel. The AC is about 5 years old, and worked perfect. The Civic blower motor uses this resistor to scale down the voltage or the speed of your air vents. Finding the location of the fan assembly is a good place to start. At the bottom of this page is a video that's very popular. After I replace the relay I have all fan speeds then the relay burns out after about an hour. The power coming out of the relay into the heater blower motor is weak. This tells you that the blower. Black, as usual, is a ground. In this tutorial, I'll show you how to test the blower motor and blower motor relay on 2001-2005 1. A blower motor is a combination of a motor and a fan that forces air through the vents into the passenger cabin. The blower motor relay switch should be below the dashboard on the passenger side of the passenger compartment. Pontiac Grand Prix Heater blower relay switch i went an found a blower motor at a junk yard that work, they test them there if you want jsut change resistor. The socket or connection is checked for damage. If the blower motor doesn't work at all, the blower motor itself must be tested first. Testing the flasher relay is a straightforward task that should take you about 15 minutes. All other connections to relay have good power and ground. I am having a problem with my blower motor on my 2004 Chevy Silverado 1500. For all other speeds the current flows from the switch through the resistor. Anything from no air circulation to annoying or noisy operation. Always consult a professional repair manual before starting your repair. How to change heat blower speed?. Buy online, pick up in-store in 30 minutes. Testing Blower Motor Amperage and Voltage Disclaimer: This video is not meant to be a definitive how to. Part 4 of 4: Replacing the heater blower relay. For information regarding diagnosis of other blower motor circuit components, refer to the appropriate Ram Truck Service Manual. If your heater or air conditioner does not blow air through the vents, this could indicate that the blower motor fuse has probably blown. How To Test The Blower Motor (2001-2005 1. The blower motor pushes the warm or cold air through your vehicle's ventilation system. In diagnosing why the motor is not working, we would typically just access the motor and test for power on the input wires and/or apply power directly to the motor. Finding the location of the fan assembly is a good place to start. Left of the blower motor is the cabin filter. The blower motor relay is located in the. It reviews best practices for diagnosing common electrical problems. ABS protection relay. Many blower resistors control current to the blower motor in all speeds except high. If the motor is ok you should see a light turn on when the probe is clipped to ground and check each. If the relay is blown out, you will need to install a new one is soon as you can. Blower Motor Relay Replacement Service What is the Blower Motor Relay all about? Most of your car's accessories require a relay in order to operate - your headlights, the cooling fan on the radiator, etc. I know the air bag is tied into the same fuse , I must have replaced the fuse 12 times. Use caution, but check the blower motor to see if it is hot. Sometimes,not always,if you bump the blower motor,it will start working,if this happens,then the blower motor is bad,if it does not,the fan switch could be bad,but the relay is usally near the blower motor. Using a capacitor tester to test the capacitor. This is with the blower switch on the off position and heater/ac on off. I like to use an incandescent test light. Use caution, but check the blower motor to see if it is hot. It's above the blower motor on the top of the channel of the HVAC box that the blower motor pushes the air into. If your blower motor is not working at all, then it's probably the blower motor relay, which is usually in the underhood fuse box. 12 Volt Source -> Heater Blower Fuses -> Blower Motor Relay -> Blower Motor Resistor -> Blower Motor When testing for power, use a test light, it is a lot easier than having to place your leads on a good ground, place the other one into a prong, and all at the same time, look for a number on your multimeter. That's why, with a good switch, you might lose one blower speed yet have the others still working. i went an found a blower motor at a junk yard that work, they test them there if you want. The blower motor relay on your Chevy vehicle is essential for the operation of the blower. If the motor is pulling a large amount of current (say 20 amps or more) then the motor is on the way out also. CASE 1: The blower motor ran in LO, M1, and M2 speed. 8L Chevy S10/ GMC S15. This is the correct and expected test result and tells you that the blower motor is good. The blower gets it's power from a relay. the blower motor relay. Hazard lamps relay. what else should i look at. Replace the burnt-out blower relay with this OE quality reproduction. Which fan speed you choose determines which resistor gets "used" by the voltage coming from the relay. How to change heat blower speed?. Now having the fan on high trips the relay, turn the air conditioner on trips faster. Same thing with checking fuses. Blower Motor Power Transistor Circuit Descriptions. For the blower motor relay to activate (and thus activate the blower motor), it needs battery power from two fuses. A motor capacitor, such as a start capacitor or run capacitor (including a dual run capacitor) is an electrical capacitor that alters the current to one or more windings of a single phase AC induction motor to create a rotating magnetic field. In the case of my 1996 Ranger the relay is behind the passenger side headlight. Interior fuses 2005-2010. Check both wires going to the blower motor. It is magnetically operated and is used to control electrical circuits from a distant point. If blower motor will not work, check voltage and ground at the blower motor connector, purple wire is voltage, black wire is ground, with HVAC turned on. I believe it's in a relay box under the passenger side dash; just haven't been able to find it. You'll be able to quite very easily switch the blower motor by by yourself, it isn't far too difficult. I checked the 15 amp fuse in the main fuse compartment - its OK. Usually, you'll lose one or two speeds as the resistor in the fan switch goes badnot the whole thing. Make sure you have 12v on both sides of those inside fusebox 30A (heater) and inside 10A (heater relay) fuses. The defective Blower Motor Relay is disconnected or the relay is pulled out of the socket. The values are slightly out of spec (per the repair manual) but I am unsure as to whether or not this is the issue; I swapped the heater and RR A/C relays and the problem did not follow the relay to the front A/C blower motor. If you're a new RVer it may help if you have a good idea of how your RV furnace should work How to test a furnace blower motor relay. A busted Blower Motor Resistor can very well be the culprit for this. I would think that this is an air handler control board problem, but it could be a thermostat problem. Use the probe to see if you are getting voltage to motor with the blower speed selector set to high. Check your owner’s manual for the precise location and other questions about your car's A/C system. Blower motor relays tend to wear out over time from the stress of constantly flicking back-and-forth. Since the blower motor and resistor are working almost constantly, it can wear out over time. The 2004-2005 has the 10-setting switch, and prior years have the 5-setting switch. Blower Motor Relay Bench Test As you're probably already I aware, the relay is made up of two separate circuits. Try this relay on yours should also be on the blower motor. If the motor is ok you should see a light turn on when the probe is clipped to ground and check each. Richard Lloyd 2,332,474 views. My blower motor wont kick on to blow the heat out, it heats up but it wont kick on? Is there any way to bypass a blower motor relay? Testing blower motor relay. I have a simple ICP Central AC unit in the house I bought last year. There is a relay in the under hood fuse box , blower motor relay. Make sure you have 12v on both sides of those inside fusebox 30A (heater) and inside 10A (heater relay) fuses. So the capacitor plays a big role. You should have battery volts. Materials Needed. If there is no damage the new Blower Motor Relay is installed. A relay is often used with computers to control analog devices. The air flow cools the resistors. via YouTube Capture. Basic instructions on how to troubleshoot the heater blower motor of a Saturn S-series. How to Replace a Heater Blower Motor Switch or Relay. To test in circuit, check that 85. Then you can trace it back to the relay. This bulletin will provide diagnosis for the blower motor relay circuit only. If your heater or air conditioner does not blow air through the vents, this could indicate that the blower motor fuse has probably blown. A relay is often used with computers to control analog devices. Relay testing (heater blower motor) This provides the power to 87 and subsequently the device the relay is designed to control. (The black wire is usually the negative. The blower motor pushes the warm or cold air through your vehicle's ventilation system. A blower motor resistor or a blower motor control module is the part that controls the speed of the blower motor. If you find that the fan in your car only works on high, you might well have a broken one. I replaced the fuse, and it blew again, so I went and got a new resistor. remove fuse and relays to control circuits spray a little electronic cleaner allow it to dry. Use caution, but check the blower motor to see if it is hot. lovely24fan not that I doubt you or anything, but before you replace the blower motor you do want to check the blower motor relay and the heater blower transistor. Use the probe to see if you are getting voltage to motor with the blower speed selector set to high. It's above the blower motor on the top of the channel of the HVAC box that the blower motor pushes the air into. via YouTube Capture. Step 1 - To test for intermitted relay failures which are common, remove the relay in question, take a small wire strand, about two inches long and insert it into the relay connector terminal 87 or 30. This will mean you have to test some things using at least a test light probe to check for voltage. The blower motor relay is located in the. For all other speeds the current flows from the switch through the resistor. How To Test Ac Blower Motor Relay Should the blower inside your furnace is not performing any more, the furnace blower motor could possibly be busted. Always consult a professional repair manual before starting your repair. my heater and air conditioning not working nothing is blowing inside the car how do I find out which parts I need to replace (blower, switch, blower resister) please help It's cold for real. TEST 3: Testing The Blower Motor Relay (Part 1) As you already may know, the blower motor relay is the one that connects the blower motor to battery power (when you turn on the heat, or A/C, in your Honda Civic). Today's test vehicle is a 2000 Chevy Suburban and this test does apply to different GMC cars and trucks as well. Blown fuses. This resistor is responsible for controlling the fan speeds of the car's heating and air conditioning unit. I still have no High speed on the Heat/AC blower motor. CASE 1: The blower motor ran without any grinding noise when you applied battery power with the jumper wire. You are able to rather quickly replace the blower motor by yourself, it isn't far too tough. Only this time, you will be attaching the testing probe to the motor's terminals. How to check a standard relay. Also, a weak blower motor relay will result in intermittent operation of the blower motor, while a failed relay will prevent the blower motor from functioning at all. Blower Motor Relay Bench Test As you're probably already I aware, the relay is made up of two separate circuits. my heater and air conditioning not working nothing is blowing inside the car how do I find out which parts I need to replace (blower, switch, blower resister) please help It's cold for real. The blower motor should have +12v at the BR/OR wire with the key on and blower selected mode any other than off. Trying to get blower working and followed richpin's video and all checked out except resistor, relay receptacle 87a. A capacitor helps the motor run and gives it more torque. In this video you'll learn how to find, test, and if need be replace the blower resistor in a 2002 Dodge van. blower motor relay - my 2004 dodge Dakota keeps blowing out the blower motor relay. The blower motor resistor is the component directly responsible for controlling the blower motor fan speed. We provide incredibly reasonable prices on quality parts. Also, a weak blower motor relay will result in intermittent operation of the blower motor, while a failed relay will prevent the blower motor from functioning at all. Buy online, pick up in-store in 30 minutes. I suspect the double pole double throw Plug-In Relay, but not sure how-to test it to verify. Check out free battery charging and engine diagnostic testing while you are in store. The defective Blower Motor Relay is disconnected or the relay is pulled out of the socket. BLOWER MOTOR RESISTOR: Disconnect and isolate the battery negative cable and unplug the wire harness connector from the blower motor resistor. A relay is often used with computers to control analog devices. The Impreza's blower motor relay is connected via connector B50 and is located up inside the dash on the driver's side. I removed the blower motor, hooked it up to 12 volt power supply, and it seems to work fine. The capacitors on most of residential blower motors are very small, so technicians tend to overlook them. Testing the flasher relay is a straightforward task that should take you about 15 minutes. If so, bad blower motor. I ran across some kind folks in another thread that were able to answer my question about the location of the Blower Motor Relay, so decided to share the information here. Blower Motor Products. 8L Chevy S10/ GMC S15. In high speed the resistor is bypassed and power is fed to the motor directly from the switch. Battery was discharged two days ago. The blower motor plays an extremely important role in forced-air systems. One of the first symptoms of a bad or failing AC blower motor relay is a blown AC blower motor relay circuit fuse. what else should i look at. When this happens you’ll be using this tutorial to test both sides of the blower motor equation. Blower motor will not stop after engine is turned off. What besides bad motor or bad wire connection will pull to many amps and overheat the resistor? First thing probably to measure amp draw at the motor, then. If blower speeds LO, M1, and M2 do not function with the relay connected to its connector, but does work when you jumper terminal B and D, then you can conclude that the blower relay is defective and needs to be replaced. If a motor doesn’t have the torque to turn the blower wheel or the fan belt, it won’t start. If you order the connector kit shown on the right amazon will offer you a package deal where it say's Frequently Bought Together items. My ac/heater blower quit working. As the relay is the switch that supplies current to the blower motor, if it fails internally, then power will be cut off from the blower motor circuit, causing the motor to no longer function or blow any air from the vents. The ORANGE wire on that same high speed relay should have +12 on it as well on high speed with IGN key on in the vents position, this provides power to run the relay, black wire goes to a good ground to kick on the relay. In diagnosing why the motor is not working, we would typically just access the motor and test for power on the input wires and/or apply power directly to the motor. How to Bench Test the Blower Motor. Blower Motor Relay Bench Test As you're probably already I aware, the relay is made up of two separate circuits. A relay is often used with computers to control analog devices. If your blower motor is not working at all, then it's probably the blower motor relay, which is usually in the underhood fuse box. The blower motor is powered by a fuse-like device called a relay. I'm thinking there is another resistor or blower relay is bad, but I cant find them to test them. Ground for the motor is provided from the blower motor speed control. The blower motor is an ECM motor. If the relay is blown out, you will need to install a new one is soon as you can. You do have to observe instructions and also have many patience though. For information regarding diagnosis of other blower motor circuit components, refer to the appropriate Ram Truck Service Manual. hi guys, where is the blower motor relay, how do you recognize it to replace, it, have replaced the resistor but sometimes the blower motor wont run and afterwords it will, have feeling its the relay thats faulty. If you hear that the blower motor is operating but don't feel any air flowing through the vents, the problem is with the airflow. What is the next step? Bad blower motor? Is there a way to test that? IS there a relay somewhere? If so, is there a way to test it?. This is the correct and expected test result. The Blower Motor Relay is verified that it needs to be replaced. The first circuit is the control circuit. Found that my receptacle for relay pin 30 is grounded. If the blower was intermittent or non working on high speed it won't be the resistor. I help need. Replaced the blower relay and resistor new from (Advance Auto) as stated in an earlier post. ©, 2017 Rick Muscoplat. STANDARD MOTOR PRODUCTS RY116; This relay is used for the PCM, fuel pump, fan motors, and a bunch of other stuff. BLOWER MOTOR RESISTOR: Disconnect and isolate the battery negative cable and unplug the wire harness connector from the blower motor resistor. Here's a simply way to test the actual relay mounted in the relay box. Usually the problem is a faulty blower switch but if you're sure the large blue wire going to the blower has no power (with key on), then start checking voltages. I am having a problem with my blower motor on my 2004 Chevy Silverado 1500. A blower motor relay that is stuck on all the time will constantly power the blower motor, sometimes with the vehicle off as mentioned. When the blower motor does not respond at all, it may not be due to mechanical failure within the motor itself. In the case of my 1996 Ranger the relay is behind the passenger side headlight. However, during troubleshooting, I too had to eliminate all the other suspect components. BLOWER MOTOR RELAY CIRCUIT TEST. A hot blower motor, which indicates an overheating problem, will require replacement. If it operates correctly, the issue will be resolved, and you can return to enjoying warm air forced through the ducts to heat your entire home. We've got a wide rang of top-quality Ford Mustang Blower Motor Relay of all the best brands in the industry at an affordable rate. We provide incredibly reasonable prices on quality parts. Where on a Hyundai Sonata are the blower motor fuses located? What are the areas to look at when a blower motor stops working? Could a bad relay of a bad connection cause a blower motor to malfunction? Get answers to all your questions about Hyundai Blower Motor Problems by asking Experts on JustAnswer. The blower resistor is connected in series with the blower fan. So check fuses > blower motor > blower motor resistor. Blower Motor Power Transistor Circuit Descriptions. The blower resistor is connected in series with the blower fan. via YouTube Capture. Same thing with checking fuses. The Blower Motor Relay is verified that it needs to be replaced. A blower motor relay that is stuck on all the time will constantly power the blower motor, sometimes with the vehicle off as mentioned. There are various possible reasons for the blower motor not working. My blower motor works when I supply 12v to it. ) Using a multimeter set on the Ohm scale, use the positive lead and test the black wire. We provide incredibly reasonable prices on quality parts. I am having a problem with my blower motor on my 2004 Chevy Silverado 1500. Here is a guide to help you test the relay and a diagram (below) of where it is located. How To Test A Furnace Blower Motor Relay When the blower in your furnace will not be doing work any longer, the furnace blower motor might be busted. AC Fan/Compressor Not Working - How To Test /Repair Broken HVAC Run Start Capacitor Air Condition HD - Duration: 26:33. I've checked the fuse in the dash fuse panel and it is good. Can you replace a 4 speed furnace motor with a 3 speed? How to set goodman furnace blower speed? Test blower motor hvac. The blower motor worked for a very brief moment after installation but now no longer works. I would suspect a couple of other things before a bad motor. 2 carrera heat blower relay 911 618 153 00 Is there a way for me to check it ? thanks _____. check blower motor relay it could be bad or blower motor resistor bad hot blower motor to see if blower work if no you have faulty blower motor. Note: 1983-1990 Rangers don't have a relay. Testing the flasher relay is a straightforward task that should take you about 15 minutes. It reviews best practices for diagnosing common electrical problems. Order Blower Motor Relay for your vehicle and pick it up in store—make your purchase, find a store near you, and get directions. Haven't had the time "due to work" to get anyone to check the switch or for a bad wire. I would check the fuses first since it is easy enough to check. Buy a 2006 Jeep Grand Cherokee Blower Motor at discount prices. The blower motor relay on your Chevy vehicle is essential for the operation of the blower. Blower motor also may run with the key off. Many blower resistors control current to the blower motor in all speeds except high. For the blower motor relay to activate (and thus activate the blower motor), it needs battery power from two fuses. What is the next step? Bad blower motor? Is there a way to test that? IS there a relay somewhere? If so, is there a way to test it?. Your car's blower motor is not only necessary for the operation of your air conditioner. Blower motor relays tend to wear out over time from the stress of constantly flicking back-and-forth. if that is allright then test your resistors for the different speeds. I checked the 15 amp fuse in the main fuse compartment - its OK. Part number? I am not getting any air out of my vents on 1-4 settings. Your issue is not the FSU and it's not the blower motor. Possibly may have to remove the blower motor to find it, but didn't want to dive into it only to realize that it's not behind it. Free Same Day Store Pickup. Your vehicle's blower motor resistor controls the speed of your blower motor. Blower motor will not stop after engine is turned off. This is the correct and expected test result. Test for power to the resistor. If the resistor shorts or fails, it may cause the blower motor to remain stuck on one fan speed. Making Sure The Blower Relay Is Getting Power And Ground. While replacement is easy, the exact location of your. When the blower motor does not respond at all, it may not be due to mechanical failure within the motor itself. Relay testing (heater blower motor) This provides the power to 87 and subsequently the device the relay is designed to control. It turns on when set to heat. These signs indicate a possible issue with the blower motor relay. There are various possible reasons for the blower motor not working. As I recall from my '77 Camaro, the plug-in on the blower motor relay should have one large red wire in the connector, plus smaller ones. Also, a weak blower motor relay will result in intermittent operation of the blower motor, while a failed relay will prevent the blower motor from functioning at all. Save now on the HCT-4213 RELAY, SOLID STATE - from TURBOCHEF at AllPoints Foodservice Parts & Supplies. TEST 3: Testing The Blower Motor Relay (Part 1) As you already may know, the blower motor relay is the one that connects the blower motor to battery power (when you turn on the heat, or A/C, in your Honda Civic). 19808 - AC / Blower Motor Relay Due to excessive heat and electrical loads the blower relay may become inoperative, leaving your vehicle without the use of air conditioning. Blown fuses. This is the basic operation of the system. FAQs Concerning Blower Motor Resistor Connectors. The blower motor power transistor is commonly referred to as the blower motor resistor when in the true technical sense it isn't a resistor. via YouTube Capture. Part 4 of 4: Replacing the heater blower relay. Automotive Blower Motor. There are various possible reasons for the blower motor not working. If you're a new RVer it may help if you have a good idea of how your RV furnace should work How to test a furnace blower motor relay. Oxygen sensor system relay. The computer may supply power or a ground to a low-amperage relay that turns a high-amperage device on or off. This is with the blower switch on the off position and heater/ac on off. could have corrosion inside fuse and relay box causing poor contact in electrical circuits. The blower motor is powered by a fuse-like device called a relay. How To Test Ac Blower Motor Relay Should the blower inside your furnace is not performing any more, the furnace blower motor could possibly be busted. That's why, with a good switch, you might lose one blower speed yet have the others still working. CASE 1: The blower motor ran in HI speed. 8 times out of 10, when the blower motor stops working, it's the motor itself that has fried but not always. You should have battery volts. If the blower motor relay develops any sort of problem that hinders its ability. Are you looking for the blower motor relay or blower motor resistor? My directions above were for the blower motor resistor, which is bad usually if your blower motor only works on one setting (usually high). The "blower motor relay", if it existed, would be inside the Blower Motor Control Module (it uses an electronic relay, a field effect transistor). I replaced the fuse, and it blew again, so I went and got a new resistor. hi guys, where is the blower motor relay, how do you recognize it to replace, it, have replaced the resistor but sometimes the blower motor wont run and afterwords it will, have feeling its the relay thats faulty. The car came with a brand new blower which was painted or powder coated and the guy who installed it failed to scuff the surface where he bolted the terminal. I still have no High speed on the Heat/AC blower motor. Were is the blower motor relay on a 2004 Nissan maxima?. You may quite effortlessly swap the blower motor by you, it isn't far too tricky. When you push the button on your IHKA control unit for the blower motor speed the IHKA control unit sends out an electrical signal to both a blower motor relay and the blower motor final stage. I forget how to test these relay switch, been a while since I've used my old DMM. There are various possible reasons for the blower motor not working. A relay is often used with computers to control analog devices. Electromechanical A/C Clutch Relay. The blower motor should have +12v at the BR/OR wire with the key on and blower selected mode any other than off. I know the air bag is tied into the same fuse , I must have replaced the fuse 12 times. Fuse F116 (30amps) feeds Relay 16 (C2216) feed 12 volts to the Blower motor, from the motor the Brown and White striped wire goes to the MSC and the MSC control it to Ground. Defective ignition switch may allow the blower motor to operate with the ignition off. The resistor is used to reduce the motor speed for positions 1-3 and is not used for 4/high speed. Blower Motor Relay Bench Test (2001-2005 1. Limited Time: Get $10 Off Your Order https://1aau. That's why, with a good switch, you might lose one blower speed yet have the others still working. If you have a variable speed blower motor, replace the blower motor speed control module. If there is no power going into the relay, then check your blower motor fuses. Repeat this process at all the different motor speeds. blower resistor blower motor/fan assembly HVAC Control Panel Blower Switch High Speed Relay and still nothing still isn't working. There are two common types of motor capacitors, run capacitors and start capacitors. Check out free battery charging and engine diagnostic testing while you are in store. The blower motor relay is located by the blower motor on the passenger's side. When the blower motor fails, see if the signal from the resistor goes. I replaced the blower motor relay, started the ac - and it worked for about 30 seconds before it blew again. Then it must be before the FSU. If the blower motor relay develops any sort of problem that hinders its ability. my heater fan stopped working, i have changed the blower motor but still nothing, what else should i look at. Here you can see the blower motor and the blower motor resistor. Same thing with checking fuses. If not, see if you get a lit light at the switch. I would think that this is an air handler control board problem, but it could be a thermostat problem. Battery was discharged two days ago.