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