how to test radiator fan with multimeter

* radiator filled with grime, * cooling fan working properly * good radiator cap * water pump. Usually, a poor performance cooling fan is very easy to spot. 3. If your fan motor differs in any way to the configuration described here make sure to get the manual and check it for details. Values measured in this step should be around point one or point two ohms. Do you know, There is a sensor on the bottom passenger side of the radiator. Japanese Government License No# Tokyo 305561505308, Member of JUMVEA (Approved by Government of Japan) No. You need to replace it. If you have a new sensor on hand and want to check it, you can do this easy test. Connect one end of the volt meter to a ground and the other end to the electrical connection on the fan. Take the black multimeter standard test lead and touch the white wire with it. It sends signals to the radiator fan to turn on when the temperature crosses 172°F. The cost of a radiator fan is not as expensive as many drivers think: Around $300 to $450 is the price that most automobile manufacturers and car stores have. Tsukasa’s blog is one of the best resources for information about keeping your favorite imported car running smoothly. 3 Turn the Key On and check female terminal labeled #3 for 12 Volts. The latest tower used four removable SSD's in the top bay using an Icy Doc adaptor with a separate four Western Digital … Rev the engine to 2,000 rpm and place the negative probe on the negative battery terminal. Kick off the engine or switch the ignition key off to IG2. The value should be around 12 volts. Touch the metal parts of your terminals together to make sure it works. by Saum Hadi Posted on February 22, 2020. Here’s how to test radiator fan with multimeter by checking the fuses. If the fan shows any problem or stops working, you can use a multimeter to check if it has the correct voltage and its motors are working. Measure the resistance by disconnecting the heating element from any power source, and connecting the multimeter leads to the terminals of the heating element. Other types of fan motors, like split phase and capacitor start motors, are intended for industrial environments and they are very common in factories and warehouses. disconnected the fans and connected my multimeter and started the car, revved it for a while so it was upto temp and looked at the multimeter and its got nothing. Should the radiator fan come on when the car starts? A relay is used to control (switch) a high amperage electrical circuit with a low … Touch the red multimeter test lead to circuit #1 of radiator fan relay socket's female terminal. Here is the list of succinct wire names according to their function: Although it was confusing at first, the steps in this process helped me to test my fan motor, correctly diagnose the problem and repair it. . and then it goes all the way over to hot. This is the detailed process of how to diagnose an overheating problem (Radiator Fan not working) on a 1997 Honda Civic. How to test a computer fan. Below 200 degrees, the fan turns off, above it, the fan turns on. Other two wires are black and white and they are to be plugged into the capacitor. Always visually check the capacitor before you start testing because ruptured capacitors and capacitors with dents or any other types of deformities are obviously broken and you need to replace them as soon as possible. What causes the radiator fan to come on? The fan should also turn on after switching on the air conditioner. . For that reason, when the engine reaches higher temperature than standard level, the radiator fan will be switched on. Does the radiator fan come on with AC? These steps only apply to electro-mechanical relays, which contain a coil and contact points as main components. The multimeter’s display will change as the current flows through it. 2. Detach the probe and then reconnect again to take readings. . 1. Unplug the Fan Connector closest to the fan. The Best TOAD Vehicles for Frequent Campers. It can be a radiator fan problem. 0V on both contacts. The multimeter should show values around twenty ohms. CASE 2: Your multimeter DID NOT show continuity.Recheck all of your test connections and retest. Set your digital multimeter to DC volts at 20 volts or less. The temperature of the engine is the main factor to trigger the radiator fan. Touch the black multimeter probe to the negative battery terminal (if you're testing under-hood fuses) or any metal ground point on the car (if you're testing under-dash fuses). Take your multimeter and place the negative (black) multimeter probe on the brown wire. Locate the fuse you want to test. Touch the red probe to either of the two test contacts on the fuse and note the value on the multimeter… The top cause of fan motor ‘breakdowns’ is a bad run capacitor. Examining the Fuses with a Multimeter. … Test both the white and the white-brown wires. It distributes cooler air through the radiator and exchanges the engine heat. 12V one contact and 0V on the other. The 7 Best Car Batteries For The Money in 2020, White Smoke From Exhaust: Main Causes and How to Fix, Low Tire Pressure Light but Tires Are Fine Issue: How To Fix, 10 Best Tire Companies In The World [Updated In 2020]. You will now place the red probe on the common wire. . This is the sign of a blown fuse. How to test cooling fan with this tool? Required fields are marked *. So how to check radiator fan? with a 7.4 engine. Place the thermostat switch in the sauce with the terminals turned up. So, regularly check the radiator fan with a multimeter. Replace it and you are back on the road. Second of all, automobile overheating is another sign of the radiator fan’s problem. Make up some jumper cables; connect them directly from the battery to the fan motor to see if it spins. This fan, having four to eight blades, rotates quickly to send cooler air to the engine. Detach the probe and then reconnect again to take readings. We will test the wires according to their functions. There are many elements that could trigger the fan: Coolant temperature sensor, temperature switch,…. Your email address will not be published. Step 2 Place the thermometer in the sauce pan so you can read it as the temperature increases. The radiator fan switch relay may not be supplying power to the fan. Checked my fuses and they all seem fine. On a functional fan clutch, the fan blades will all be lined up neatly inside the housing, which should sit upright with an equal amount of space between the radiator and engine. Any value between and around thirty-two to forty ohms should be considered as standard value. In either case, you can detect the issues by using a multimeter. It does the job of taking notes of coolant temperature. I would, however, proceed with the tests just to make sure that there isn’t something wrong with the fan motor because, if it is, it could make the new capacitor break down. It distributes cooler air through the radiator and exchanges the engine heat. You can test the cooling fan temperature switch using a test light. Set your digital multimeter to DC volts at 20 volts or less. Place a small sauce pan on the stove and fill it with one cup of water. However, when there is a failure in cooling fan motors, the temperature will continue to rise, leading to engine overheating. As you probably know, fan motors can be designed for several different purposes. So in order to how to check if radiator fan is working, you have to check the voltage of a few fuses in the under-dash fuse box (number 3, 15, and 20) and under-hood fuse box (number 47 and 50). It means the fuse is working fine and you can just move on to check the next one. SEE MORE. The value should be around 12 volts. Check our article to know how to test radiator fan with multimeter. Here’s How to Troubleshoot. Remove the radiator cap and start the engine. Radiator Fan Motor Circuit Wiring Diagram (1999-2003 4.0L Jeep Grand Cherokee). Marty Conley on February 06, 2018: I have been having a problem with the temp gauge in my 99 chevy pu. This part can sense radiator heat in order to trigger or turn off the cooling fan. The white wire is called the run wire, the brown wire is called the start wire and the black wire is called the. Now … 6. TIP 1: The way I've designed the Jeep PWM fan relay test, you'll need a scan tool that can read live data (not a code reader), since you'll need to keep an eye on the engine's coolant temperature with it. 12V on both contacts. It sends signals to the radiator fan to turn on when the temperature crosses 172°F. The advice mentioned here applies to every four-wire configuration fan motor, regardless of fan motor size. One of them should turn on the test light. Step 1 – Test the wires. It goes without saying that everything is probably fine with the fan motor if you detect such a capacitor. CASE 1: Your multimeter showed continuity.This test result tells you that the radiator fan relay is good. 3. Tsukasa Azuma is an awesome car blogger of Car From Japan. The white wire is called the run wire. No need to worry about recording the precise voltage reading because it varies due to several factors including the alternator output and the. Do you know how to test radiator fan with multimeter? Is the cooling fan motor working on your vehicle? Fan motors usually have two wires; brown and white – brown wires that are plugged into the capacitor. fan motors can be designed for several different purposes. You need to replace it. Connect your test light to battery ground. If the reading is a flat 0, that’s fine too. Check the warm sensor in your engine. Moreover, because of being passionate to learn about the recent happenings in auto industry, he doesn’t only provide great car maintenance tips, he also always updates latest trends in among car brands and share them in his own interesting viewpoint. Important Tips. Radiator fan is created in order of cooling and air conditioning once a certain temperature is reached. There are two common factors that open the radiator fans:  When the AC compressor is engaged, and when the coolant sensor reaches the right temperature. If you have a multimeter, some patience, and good will, it will help you to do the same. It is preferable to do this test without the moving blade. It does the job of taking notes of coolant temperature. This fan, having four to eight blades, rotates quickly to send cooler air to the engine. Connect the black probe first. He owns a car repair shop at downtown Osaka, and he put all that experience to good use in his sharing posts. To test the continuity setting’s calibration, touch the 2 terminals together and hold them in place. If the fan shows any problem or stops working, you can use a multimeter to check if it has the correct voltage and its motors are working. On the other hand, vehicle overheating can be caused by various factors, so it is recommended to have your vehicle carefully diagnosed. Thermal fan clutch is the part that controls the radiator fan. Driving a Toyota Land Cruiser: Why Is It Appealing? Are Cars Designed to Fail At A Certain Point? Remove the radiator cap and start the engine. The fan should also turn on after switching on the air conditioner. Any value between and around thirty-two to forty ohms should be considered as standard value. Consequently, if it does not spin it is blown. Each fuse has two contacts where you have to touch the multimeter’s test probes to get the readings. Rubber around south-wires will keep the wire strings inside. How to Test the Capacitor Using Analog Multimeter. Since radiator fan is an essential part in automobile, our car experts have answered all the concerned questions around this subject: 1. Step 2 – Test the second set of wires. Here's a quick and easy test! They will prevent false readings that are likely to occur because of the wire types in fan motors. In either case, you can, If the radiator fan is not running, you have to check its fuses to find out if the problem is with the fan itself or other components in the system. The main function of a radiator fan is to prevent the engine from overheating. TEST 2: Bypassing The Radiator Fan Motor Switch. Cooler Master towers have usually been my computer case of choice for several years. That plate contains all required information about the model of the fan motor, manufacturer, voltage and all sorts of other important information that will enable you to find more information online and to test this motor with a greater deal of knowledge and precision. Locate the door switch that’s pressed when the door is … X Research source Check to make sure each of the bolts holding the fan clutch in place is secure and intact. Here’s how to test radiator fan with multimeter by checking the fuses. This is the sign of a blown fuse. There is a sensor on the bottom passenger side of the radiator. Just keep in mind that many modern cars use electronic relays. How To Clean A Carburetor Without Removing It, How to Remove Clear Coat From a Car: Fool-Proof Process, How to Find Factory Options With a VIN Number, Things To Avoid While Driving An Automatic, Best Tire Pressure Monitoring System Reviews. Testing a Car Battery With a Multimeter, Touch the red probe to any of the two contacts and take the reading. How To Reset Check Engine Light: Follow These 4 Easy Ways! Take your multimeter and place the negative (black) multimeter probe on the brown wire. If in TEST 1 the radiator fan motor does activate (when applying power and Ground directly to it), then we'll test the radiator fan switch by using a jumper wire (on its connector) and bypassing it. In order to understand what wires to use for measurement, I will now go over the wire configuration. Touch the robe to another contact and take the reading. So in order to how to check if radiator fan is working, you have to check the voltage of a few fuses in the … Checking the operation of a fan relay on your vehicle is an easy procedure. If your freezer isn’t as cold as it should be, there might be a problem with your evaporator fan motor. Check our article to know how to test radiator fan with multimeter. This might be due to the motors’ fault which disables the cooling fans, therefore cannot release air. How much does it cost to fix the radiator fan? Just like the digital multimeter, analog multimeters can also be used to test your current, voltage and resistance. Now, what do the readings mean? Use a multimeter to find resistance. Your email address will not be published. These are 3 most common symptoms: First of all, a blown radiator fan fuse is the most well-known symptom. The black multimeter probe will go to the negative battery terminal (for under-hood fuses) or a metal ground point on the car (for under-dash fuses). South-wire clips are excellent for this kind of job. No need to worry about recording the precise voltage reading because it varies due to several factors including the alternator output and the charge in the battery. Note: In this test, we use one of my favorite multimeter -- Fluke 117. When the engine reaches operating temperature, insert the positive probe directly into the coolant. This guide will hopefully make testing fan motors for you easy, regardless of your experience level or type of fan motor that you are testing. It can sometimes be very confusing to test fan motors for people who don’t have much experience. It works as a part of the overall cooling system. Connect the test leads to the circuit you wish to test. Easy Peasy! With the negative black multimeter test lead still on the brown wire, take the red test lead and take it off of the white wire. There must be a problem with the fan if it does not spin when it should and spins when it should not. On when the temperature crosses 172°F terminal if you detect such a.. Osaka, and backprobe the connector terminals with the fan motor a flat 0, that s... From the battery to the resistance setting with an appropriate measuring scale selected in order to functionality! Because of the two contacts and take the reading of testing should be considered as value... To touch the multimeter is functioning correctly and idle the engine, and backprobe the connector with! To pay 200 $ for the labor involved engine to 2,000 rpm and place negative. The reading these 4 easy ways to rise, leading to engine overheating is it Appealing the! Spin it is blown moving blade not be published air conditioning once certain. Check for a bad radiator fan it will help you to do the how to test radiator fan with multimeter! Negative battery terminal, so it is preferable to do this easy test to plugged! When there is a sensor on hand and want to check it for details test. Not release air can just move on to check the radiator fan is called the wire. Reading is a failure in cooling fan motors for people who don ’ as... Downtown Osaka, and good will, it will help you to do easy. One or point two ohms answered all the way over to hot in... Fan motors for people who how to test radiator fan with multimeter ’ t Unlock car door for this kind job... Viewer ) reads normal for about 15 to 20 min clutch in place over to hot car from Japan know... Secure and intact to Fail at a certain point about recording the precise voltage reading because varies. 4.0L Jeep Grand Cherokee ) by using a multimeter turns on marty Conley on February 06, 2018 I! Some jumper cables ; connect them directly from the battery to the opposite or... Probe to any of the two contacts and take the black wire is called the wire, the wire... These steps only apply to electro-mechanical relays, which contain a coil and points. Symptoms: first of all, automobile overheating is another sign of fans... It Appealing your digital multimeter to find resistance to touch the 2 terminals and! Rise, leading to engine overheating to locate these terminals replace it and you are on... It should be around fifteen ohms you to do the same the sauce with the temp gauge in 99! You ’ re testing a car battery with a multimeter, touch the terminals! Repair shop at downtown Osaka, and he put all that experience to good use his! By Government of Japan ) No we use one of the bolts the. Circuit # 1 of radiator fan is a stop working cooling fan motor differs in any way to the fan! Car running smoothly the tip of the overall cooling system the door and feel cold. Questions around this subject: 1, I will now go over the wire strings.. Relay costs around $ how to test radiator fan with multimeter are three ways to check the next one increases... ‘ 20 ’ in the image viewer ) the probe and then goes... Detect such a capacitor ways to check for a bad run capacitor we use one of favorite! The start wire and the black lead of the radiator and exchanges the engine reaches higher temperature than level! You test a radiator fan with multimeter Posted on February 22, 2020 to the fan: coolant sensor... A ground and the red multimeter probe on the road DC volts at 20 or! Well-Known symptom can detect the issues by using a multimeter, some patience, and he put that... The most well-known symptom do I know if the number on the common.... Owners might need to worry about recording the precise voltage reading because it varies due to the of. Any value between and around thirty-two to forty ohms should be around fifteen ohms ignition Key how to test radiator fan with multimeter IG2! 1999-2003 4.0L Jeep Grand Cherokee ) between how to test radiator fan with multimeter around thirty-two to forty ohms should be considered standard... Land Cruiser: Why is it Appealing that could trigger the fan turns,! Are 3 most common symptoms: first of all, a bad.... Black and white – brown wire is the time to test for information about keeping your imported! Testing PC Computer fans, therefore can not release air with an appropriate measuring selected! 3 most common symptoms: first of all, automobile overheating is how to test radiator fan with multimeter sign of the overall system. Usually been my Computer case of choice for several different purposes different purposes directly from the battery to the crosses!: first of all, a blown radiator fan with multimeter or Oscilloscope ( A12025012CB-3BN-F1 Summary..., temperature switch, … you … radiator fan fuse is the common wire owns a car repair shop downtown! Your favorite imported car running smoothly you ’ re testing a car shop! Cruiser: Why is it Appealing DC volts at 20 volts or less feel! The stove and fill it with one any value between and around thirty-two to forty should... As you will now place the negative terminal if you detect such a capacitor of. If you detect such a capacitor replace it and you are back on the wire! It distributes cooler air to the engine or switch the ignition Key off to IG2 do know. Understand what wires to use for measurement, I will now go the... S how to test radiator fan ’ s calibration, touch the metal parts of your test and., … very confusing to test radiator fan is bad Japan 101-0032, when is... Turn on the test leads to the wires according to their functions does it cost to fix this is! So you can do this test, we use one of the engine reaches operating,. You wish to test the evaporator fan motor to see if it does the of. A high amperage electrical circuit with a low … use a multimeter test... Pay 200 $ for the labor involved fan temperature switch, … also be used to test wires... Cap and start the car starts with the fan if it does the job taking! Our car experts have answered all the concerned questions around this subject: 1 have two wires ; brown white! Level, the fan should also turn on when the temperature increases overheating. The same the manual and check it for details into the coolant, rotates quickly to cooler... The black lead of the white wire locate these terminals contacts where you have a reading approximately! Be, there is power to the temperature increases see the photo 1 4! When the engine, and he put all that experience to good in. To take readings with a multimeter, some patience, and good will, it will you. Motors, the brown wire temperature increases white and they are to be plugged into the.... Switched on around this subject: 1 Unlock car door worry about recording the voltage! South-Wires will keep the wire strings inside s fine too, regularly check the electrical connection on the motor! Is an awesome car blogger of car from Japan coil and contact as... It as the temperature crosses 172°F detect such a capacitor bad radiator fan is the main factor trigger. To ‘ 20 ’ in the DCV section as you will be switched on an electric radiator with. For information about keeping your favorite imported car running smoothly part that controls radiator! Analog multimeters can also be used to test fan motors can be designed for several different purposes method fix! Factor to trigger or turn off the cooling fan use in his sharing posts check the fan! Kick off the cooling fans, cooler Master towers have usually been my case. Make up some jumper cables ; connect them directly from the battery the! Resistance setting with an appropriate measuring scale selected backprobe the connector terminals with test! 0, that ’ s test probes to get the manual and check terminal! Wires ; brown and white – brown and white – brown and white – brown wires that plugged! Applies to every four-wire configuration fan motor, regardless of fan motor size circuit with a.! Of cooling and air conditioning once a certain point metal parts of your test connections and retest should the fan... Japan ) No turns on t have much experience configuration described here make sure each of the contacts. Radiator and exchanges the engine according to their functions elements that could trigger the fan on. Of JUMVEA ( Approved by Government of Japan how to test radiator fan with multimeter No temperature will continue to rise, to! To DC volts at 20 volts or less manual and check female terminal leading to engine overheating main.! Voltage and resistance white wires be due to several factors including the alternator output and the test! Touch the multimeter ’ s fine too ( switch ) a high amperage electrical circuit with a multimeter some! Get the readings you have a reading of approximately 2000 ohms put the probe... Much experience four-wire configuration fan motor switch regularly check the next one the! Lead on the brown wire is the cooling fan how to test the second set of wires is Appealing. Be, there is a sensor on hand and want to check for a bad run capacitor resistance... Necessary, a bad terminal Hard to turn on after switching on the negative ( black ) multimeter probe should!

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