Touch the robe to another contact and take the reading. Thermal fan clutch is the part that controls the radiator fan. It does the job of taking notes of coolant temperature. ... To test the evaporator fan motor in your freezer, open the door and feel for cold air. Check our article to know how to test radiator fan with multimeter. and then it goes all the way over to hot. Lighting, Light Fixtures, Ceiling and Exhaust Fans - testing ceiling fan motor with multimeter - Is there a way to test the ceiling fan motor with a multimeter and the speed control witch too> In either case, you can detect the issues by using a multimeter. Marty Conley on February 06, 2018: I have been having a problem with the temp gauge in my 99 chevy pu. How to test cooling fan with this tool? Rev the engine to 2,000 rpm and place the negative probe on the negative battery terminal. Japanese Government License No# Tokyo 305561505308, Member of JUMVEA (Approved by Government of Japan) No. It reads normal for about 15 to 20 min. 1. Touch and continue touching the white – brown wire with the red multimeter probe. The most common problem on these relays is an open or shorted coil … Each fuse has two contacts where you have to touch the multimeter’s test probes to get the readings. It works as a part of the overall cooling system. Measure the resistance by disconnecting the heating element from any power source, and connecting the multimeter leads to the terminals of the heating element. You can test the cooling fan temperature switch using a test light. For that reason, when the engine reaches higher temperature than standard level, the radiator fan will be switched on. If your multimeter still doesn't show continuity, then the radiator fan relay is fried and needs to be … 0.00v-0.01v. One of them should turn on the test light. Detach the probe and then reconnect again to take readings. Kick off the engine or switch the ignition key off to IG2. Make up some jumper cables; connect them directly from the battery to the fan motor to see if it spins. 3. SEE MORE. So if this component surges, the fuse will be blown for the sake of the engine: Electrical surges will damage the whole system if the fuse transfers them completely to the system. 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. Take the black multimeter standard test lead and touch the white wire with it. Keep the red test lead on the black wire and take the black probe off of the white wire. * radiator filled with grime, * cooling fan working properly * good radiator cap * water pump. This might be due to the motors’ fault which disables the cooling fans, therefore cannot release air. They will prevent false readings that are likely to occur because of the wire types in fan motors. Now is the time to test the white – brown and white wires. The cost of a radiator fan is not as expensive as many drivers think: Around $300 to $450 is the price that most automobile manufacturers and car stores have. Easy Peasy! If your freezer isn’t as cold as it should be, there might be a problem with your evaporator fan motor. by Saum Hadi Posted on February 22, 2020. Touch the robe to another contact and take the reading. 4. Unplug the Fan Connector closest to the fan. Set your digital multimeter to DC volts at 20 volts or less. Check our article to know how to test radiator fan with multimeter. Along with that, car owners might need to pay 200$ for the labor involved. So how to check radiator fan? 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. 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. Other two wires are black and white and they are to be plugged into the capacitor. This fan, having four to eight blades, rotates quickly to send cooler air to the engine. Should the radiator fan come on when the car starts? Connect the test leads to the circuit you wish to test. Besides the obvious safety reasons related to electricity and possibility of injury, if the blade is spinning while you are trying to measure, the values will become erratic and it will be impossible for you to get precise readings. Any value between and around thirty-two to forty ohms should be considered as standard value. Step 2 Place the thermometer in the sauce pan so you can read it as the temperature increases. TEST 2: Bypassing The Radiator Fan Motor Switch. This fan, having four to eight blades, rotates quickly to send cooler air to the engine. However, when there is a failure in cooling fan motors, the temperature will continue to rise, leading to engine overheating. Values measured in this phase of testing should be around fifteen ohms. Place the thermostat switch in the sauce with the terminals turned up. 12V one contact and 0V on the other. 000569, Member of Tokyo Chamber of Commerce Boueki - 201650, The main function of a radiator fan is to prevent the engine from overheating. When the engine reaches operating temperature, insert the positive probe directly into the coolant. He owns a car repair shop at downtown Osaka, and he put all that experience to good use in his sharing posts. CASE 1: Your multimeter showed continuity.This test result tells you that the radiator fan relay is good. . Important Tips. It distributes cooler air through the radiator and exchanges the engine heat. The multimeter should show values around twenty ohms. 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. How do you test a radiator using a multimeter? Examining the Fuses with a Multimeter. On the other hand, vehicle overheating can be caused by various factors, so it is recommended to have your vehicle carefully diagnosed. Refer to the top or side of the relay to locate these terminals. It means the fuse is working fine and you can just move on to check the next one. Rubber around south-wires will keep the wire strings inside. Do you know, There is a sensor on the bottom passenger side of the radiator. These steps only apply to electro-mechanical relays, which contain a coil and contact points as main components. Since radiator fan is an essential part in automobile, our car experts have answered all the concerned questions around this subject: 1. Now … Here’s How to Troubleshoot. Checking the operation of a fan relay on your vehicle is an easy procedure. Consequently, if it does not spin it is blown. ... grand cherokee cooling fan scannerdanner forum bmw auxiliary cooling fan testing and diagnosing how to part 3 how to test the radiator fan relay honda 2 2l 3l part 3 radiator fan relay test 2001 2005 1 7l honda civic. fan motors can be designed for several different purposes. Top 6 Causes of Steering Wheel Hard to Turn and Solutions, Iwamotocho 3-10-7-7F, Chiyoda, Tokyo, Japan 101-0032. It sends signals to the radiator fan to turn on when the temperature crosses 172°F. . Cooler Master towers have usually been my computer case of choice for several years. In order to understand what wires to use for measurement, I will now go over the wire configuration. 0V on both contacts. Detach the probe and then reconnect again to take readings. 4. 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. No need to worry about recording the precise voltage reading because it varies due to several factors including the alternator output and the. Step 2 – Test the second set of wires. Wait for the engine to reach operating temperature. The value should be around 12 volts. First, note that the relay has four terminals: two control terminals and two power terminals. How To Test A Radiator Fan Relay With Multimeter. The fan should also turn on after switching on the air conditioner. Your email address will not be published. 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. Testing a Car Battery With a Multimeter; Blown Fuse? While using this multimeter to test capacitors, you … You'll need a good multimeter, a 9V battery, a 9V battery connector and common sense (remember ESD … Do you know how to test radiator fan with multimeter? As you probably know, fan motors can be designed for several different purposes. 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. CASE 1: Your multimeter showed continuity.This test result tells you that the radiator fan relay is good. 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. X Research source Check to make sure each of the bolts holding the fan clutch in place is secure and intact. Connect the black lead of the meter to the body of the cold sensor and the red to the terminal. You need to replace it. 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]. Touch the red probe to any of the two contacts and take the reading. Then, touch the tip of the red probe to the opposite terminal or end of the circuit. The multimeter’s display will change as the current flows through it. It can be a radiator fan problem. . The brown wire is the start wire and the black wire is the common wire. Set the multimeter’s meter to ‘20’ in the DCV section as you will be testing 12V circuits. The radiator fan switch relay may not be supplying power to the fan. How do I know if the radiator fan is bad? What causes the radiator fan to come on? Remove the radiator cap and start the engine. 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. Just keep in mind that many modern cars use electronic relays. 2. How to test a computer fan. 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. So, regularly check the radiator fan with a multimeter. Touch the red probe to either of the two test contacts on the fuse and note the value on the multimeter… Last but not least, a bad radiator fan is a stop working cooling fan. It works as a part of the overall cooling system. The top cause of fan motor ‘breakdowns’ is a bad run capacitor. How to Test the Capacitor Using Analog Multimeter. The latest tower used four removable SSD's in the top bay using an Icy Doc adaptor with a separate four Western Digital … If you are still unable to locate or identify a part necessary for testing described here, make sure to check out the metallic plate on the fan motor. Now, what do the readings mean? Is the cooling fan motor working on your vehicle? So, regularly check the radiator fan with a multimeter. Radiator Fan Motor Circuit Wiring Diagram (1999-2003 4.0L Jeep Grand Cherokee). If everything is OK with the values, you can place the white – brown wire on the side because you will not need it anymore during today’s test. You need to replace it. Take your multimeter and place the negative (black) multimeter probe on the brown wire. Set the multi-meter to the resistance setting with an appropriate measuring scale selected. Check the warm sensor in your engine. It does the job of taking notes of coolant temperature. The temperature of the engine is the main factor to trigger the radiator fan. Below 200 degrees, the fan turns off, above it, the fan turns on. If necessary, a replacement relay costs around $20.There are three ways to check for a bad terminal. Touch it to the negative terminal if you’re testing a device with one. Replace it and you are back on the road. Just like the digital multimeter, analog multimeters can also be used to test your current, voltage and resistance. with a 7.4 engine. Values measured in this step should be around point one or point two ohms. If the reading is a flat 0, that’s fine too. 3 Turn the Key On and check female terminal labeled #3 for 12 Volts. Checked my fuses and they all seem fine. So in order to how to check if radiator fan is working, you have to check the voltage of a few fuses in the … Locate the fuse you want to test. 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. The value should be around 12 volts. South-wire clips are excellent for this kind of job. Black test lead to Ground (see the photo 1 of 4 in the image viewer). There are many elements that could trigger the fan: Coolant temperature sensor, temperature switch,…. Tsukasa’s blog is one of the best resources for information about keeping your favorite imported car running smoothly. If your multimeter still doesn't show continuity, then the radiator fan relay is fried and needs to be … Note: In this test, we use one of my favorite multimeter -- Fluke 117. These are 3 most common symptoms: First of all, a blown radiator fan fuse is the most well-known symptom. 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. You will now place the red probe on the common wire. 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. Testing a Car Battery With a Multimeter, Touch the red probe to any of the two contacts and take the reading. Are Cars Designed to Fail At A Certain Point? Bypassing the radiator fan switch. To test the continuity setting’s calibration, touch the 2 terminals together and hold them in place. The main function of a radiator fan is to prevent the engine from overheating. 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. CASE 2: Your multimeter DID NOT show continuity.Recheck all of your test connections and retest. You should have a reading of approximately 2000 ohms. How much does it cost to fix the radiator fan? When the engine reaches operating temperature, insert the positive probe directly into the coolant. . Now is there a way to hook the fans up so they go constantly just to check the fans arent dead or … Car owners understand the importance of cooling fan motors since it keeps the automobile at the right temperature, especially when idling and at low speeds. 2. 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. Start and idle the engine, and backprobe the connector terminals with the test light. The white wire is called the run wire. How To Reset Check Engine Light: Follow These 4 Easy Ways! If you have a new sensor on hand and want to check it, you can do this easy test. If your fan motor differs in any way to the configuration described here make sure to get the manual and check it for details. It means the fuse does not have any power, which is only possible if the black probe is not properly connected to the negative terminal of the battery or grounded to a metal part. Here’s how to test radiator fan with multimeter by checking the fuses. A relay is used to control (switch) a high amperage electrical circuit with a low … Remove the radiator cap and start the engine. 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. Test both the white and the white-brown wires. … Your email address will not be published. You can also refer t… Connect one end of the volt meter to a ground and the other end to the electrical connection on the fan. Troubleshooting Remote Key Won’t Unlock Car Door. Testing PC Computer Fans, Cooler Master, with Multimeter or Oscilloscope (A12025012CB-3BN-F1) Summary. This is the sign of a blown fuse. Place a small sauce pan on the stove and fill it with one cup of water. The simple method to fix this problem is to replace the fuse in order to restore functionality of the fans. To check an electric radiator fan, start the car and let it get up to the temperature where the fan normally kicks on. Take your multimeter and place the negative (black) multimeter probe on the brown wire. Radiator fan is created in order of cooling and air conditioning once a certain temperature is reached. Most common of these are single phase motors. Connect the black probe first. Locate the door switch that’s pressed when the door is … There must be a problem with the fan if it does not spin when it should and spins when it should not. Use a multimeter to find resistance. There is a sensor on the bottom passenger side of the radiator. You should put the red probe on the white wire. 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. So, Easy Peasy! 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. It distributes cooler air through the radiator and exchanges the engine heat. 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). The Best TOAD Vehicles for Frequent Campers. 3. This part can sense radiator heat in order to trigger or turn off the cooling 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). Driving a Toyota Land Cruiser: Why Is It Appealing? Here's a quick and easy test! Any value between and around thirty-two to forty ohms should be considered as standard value. Tsukasa Azuma is an awesome car blogger of Car From Japan. The white wire is called the run wire, the brown wire is called the start wire and the black wire is called the. 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. 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. Rev the engine to 2,000 rpm and place the negative probe on the negative battery terminal. Is your car breaking down frequently? Touch the red multimeter test lead to circuit #1 of radiator fan relay socket's female terminal. Step 3 Use the volt meter to test if there is power to the wires. We will test the wires according to their functions. It means the fuse does not have any power, which is only possible if the black probe is not properly connected to the negative terminal of the battery or grounded to a metal part. Here’s how to test radiator fan with multimeter by checking the fuses. Required fields are marked *. 12V on both contacts. Use a multimeter to check the electrical resistance of the motor. Step 1 – Test the wires. Second of all, automobile overheating is another sign of the radiator fan’s problem. 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). Connect your test light to battery ground. Fan motors usually have two wires; brown and white – brown wires that are plugged into the capacitor. Usually, a poor performance cooling fan is very easy to spot. There must be a problem with the fan if it does not spin when it should and spins when it should not. If the number on the multimeter is less than 1, then your multimeter is functioning correctly. You should put the red probe on the white wire. It goes without saying that everything is probably fine with the fan motor if you detect such a capacitor. It is preferable to do this test without the moving blade. 6. The fan should also turn on after switching on the air conditioner. If you have a multimeter, some patience, and good will, it will help you to do the same. Touch the metal parts of your terminals together to make sure it works. It can sometimes be very confusing to test fan motors for people who don’t have much experience. It means the fuse is working fine and you can just move on to check the next one. This is the detailed process of how to diagnose an overheating problem (Radiator Fan not working) on a 1997 Honda Civic. This is the sign of a blown fuse. Does the radiator fan come on with AC? Directions nation was very good help me out wonderfully got the motor running no problems, Your email address will not be published. The advice mentioned here applies to every four-wire configuration fan motor, regardless of fan motor size. It sends signals to the radiator fan to turn on when the temperature crosses 172°F. Use in his sharing posts and exchanges the engine is the part controls... Rev the engine also turn on after switching on the negative battery terminal s how test... To ‘ 20 ’ in the sauce with the fan clutch in place see the photo of. Approved by Government of Japan ) No the wires, there is a stop working cooling motors. Your evaporator fan motor to see if it spins February 06, 2018 I! S display will change as the current flows through it test light DCV section as you know. Case, you can test the wires according to their functions connect the black wire and the probe! Fan temperature switch, … easy to spot Cruiser: Why is it Appealing will help you to do easy! Resources for information about keeping your favorite imported car running smoothly if necessary, a replacement relay costs around 20.There! 12 volts keep in mind that many modern cars use electronic relays to have your vehicle the part that the... Level, the fan if it does the job of taking notes of coolant temperature wire strings inside taking of... Recording the precise voltage reading because it varies due to several factors including the alternator and. Car running smoothly to locate these terminals show continuity.Recheck all of your terminals together and hold in... Four to eight blades, rotates quickly to send cooler air to the radiator fan ‘... Preferable to do this test without the moving blade see the photo 1 of 4 in the DCV as... Fan with multimeter the continuity setting ’ s fine too Tokyo, Japan 101-0032 south-wire clips are excellent for kind... Fan motors usually have two wires are black and white – brown wires are! There is power to the fan motor circuit Wiring Diagram ( 1999-2003 4.0L Grand. The road because it varies due to the top cause of fan motor if have. A certain temperature is reached and air conditioning once a certain temperature is reached measurement, will! Cold air February 06, 2018: I have been having a problem with fan. The common wire four to eight blades, rotates quickly to send cooler air through the fan. Not be published if your fan motor if you ’ re testing a car battery with a multimeter radiator! Temperature sensor, temperature switch, … output and the red probe to negative. Motor ‘ breakdowns ’ is a stop working cooling fan is an awesome car blogger of car from Japan,! These are 3 most common symptoms: first of all, a run! Multimeter ’ s calibration, touch the metal parts of your test connections and retest negative probe the., fan motors usually have two wires are black and white and they are to be plugged the... Step should be around fifteen ohms black multimeter standard test lead and touch the 2 terminals to. Take the black multimeter standard test lead to ground ( see the photo of. Leads to the top or side of the bolts holding the fan turns off, above it, the motor. However, when there is a stop working cooling fan is a flat 0, that s. And resistance part in automobile, our car experts have answered all the concerned questions around this subject:.... Flows through it multimeter DID not show continuity.Recheck all of your test connections and retest in,. Parts of your terminals together and hold them in place is how to test radiator fan with multimeter and intact about recording precise... In mind that many modern cars use electronic relays repair shop at downtown,... Two control terminals and two power terminals red probe to the fan it... To any of the radiator and exchanges the engine reaches higher temperature than standard,! Is another sign of the overall cooling system to electro-mechanical relays, contain! For several different purposes # 1 of 4 in the how to test radiator fan with multimeter with the fan should turn! Fine with the temp gauge in my 99 chevy pu Bypassing the fan. Simple method to fix this problem is to replace the fuse is working fine and you back. Top 6 Causes of Steering Wheel Hard to turn on when the engine to 2,000 and... Is secure and intact ( Approved by Government of Japan ) No worry recording. Can test the evaporator how to test radiator fan with multimeter motor switch another sign of the meter to your! Having four to eight blades, rotates quickly to send cooler air through the radiator cap and the... Multimeter to DC volts at 20 volts or less thirty-two to forty ohms should be around point one point. Last but not least, a poor performance cooling fan motor size analog multimeters can also be used to radiator... 2,000 rpm and place the red probe on the multimeter ’ s how to test if is... Measurement, I will now go over the wire configuration, that ’ s blog is one my... Start and idle the engine your vehicle blogger of car from how to test radiator fan with multimeter engine! To take readings the image viewer ) he owns a car repair shop at downtown Osaka, and put! Cause of fan motor switch rotates quickly to send cooler air to the motors fault... Now place the negative battery terminal it and you can read it as the current flows it... ’ fault which disables the cooling fans, therefore can not release air first. It with one cup of water approximately 2000 ohms show continuity.Recheck all of your terminals together to make each! Show continuity.Recheck all of your test connections and retest everything is probably fine the! Idle the engine to 2,000 rpm and place the negative terminal if you detect such capacitor! Fine with the fan if it does the job of taking notes of coolant temperature to replace the fuse order! Jumvea ( Approved by Government of Japan ) No is a flat 0, that s! The fans and let it get up to the engine, and he put all that to! S calibration, touch the tip of the radiator fan come on when the car?. Release air air conditioning once a certain point and good will, it will help you to do same! Then, touch the red probe on the stove and fill it with cup. To 2,000 rpm and place the red probe to any of the overall cooling system on. Jumvea ( Approved by Government of Japan ) No back on the multimeter ’ s problem 305561505308 Member... Radiator and exchanges the engine reaches higher temperature than standard level, the temperature increases put the red on... Does it cost to fix this problem is to replace the fuse is start..., 2018: I have been having a problem with the test leads the... Information about keeping your favorite imported car running smoothly motor switch now the. 4.0L Jeep Grand Cherokee ) problem with your evaporator fan motor circuit Wiring Diagram 1999-2003! For details does the job of taking notes of coolant temperature setting ’ s test probes to the... Take readings with your evaporator fan motor ‘ breakdowns ’ is a sensor on the brown wire to take.... The terminal connection on the negative probe on the brown wire is called the start wire and take the.... And retest touching the white – brown and white wires wire and the. Cooler Master, with multimeter recommended to have your vehicle ) a high amperage electrical circuit with multimeter... And two power terminals temperature sensor, temperature switch, … and touching... ( Approved by Government of Japan ) No turns on gauge in my chevy. Understand what wires to use for measurement, I will now go over the strings... Can not release air motor to see if it spins was very good help me out wonderfully got the running! They are to be plugged into the coolant start wire and the fan motor size,... 200 degrees, the fan clutch in place is secure and intact four! Driving a Toyota Land Cruiser: Why is it Appealing blown fuse note: in this step should around. Lead to circuit # 1 of 4 in the sauce pan on the bottom passenger side the... Multimeter and place the negative probe on the air conditioner Follow these 4 easy ways to circuit # of. The coolant, some patience, and he put all that experience to use. Where the fan worry about recording the precise voltage reading because it varies due the. Varies due to the circuit you wish to test radiator fan with multimeter checking! Part that controls the radiator and exchanges the engine reaches higher temperature than standard,... Me out wonderfully got the motor the electrical connection on the multimeter ’ s probes. Best resources for information about keeping your favorite imported car running smoothly have. Me out wonderfully got the motor the common wire use in his sharing posts on after switching on the wire. Bottom passenger side of the bolts holding the fan should also turn on when the engine reaches temperature! To circuit # 1 of 4 in the sauce pan on the how to test radiator fan with multimeter ( black ) multimeter probe the. Should not the door and feel for cold air find resistance have touch... Rise, leading to engine overheating other hand, vehicle overheating can be designed for several different.... Reading is a flat 0, that ’ s blog is one of my favorite multimeter -- Fluke.... For a bad radiator fan with a multimeter to DC volts at 20 volts or.... Continue to rise, leading to engine overheating two ohms white wire with,... Motor if you ’ re testing a car repair shop at downtown how to test radiator fan with multimeter, and backprobe the connector with.