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 Directions nation was very good help me out wonderfully got the motor running no problems, Your email address will not be published.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