Connect one end of the volt meter to a ground and the other end to the electrical connection on the fan. Step 2 . Timing Belts – Why Should You Replace Your Engine Timing Belt, Engine Spark Knock – That Annoying Knocking, Pinging Or Rattling Sound, Tailpipe Smoke – What Does The Color Of The Tailpipe Smoke Mean, Engine Coolant Leaks – How To Find Them – How Bad Are They, Valve Lifters – Hydraulic And Mechanical – What Is The Difference, Radiator Cap – Basic Function – Failure Symptoms – How Important Is It, Engine Bearing Replacement – Learn How To Replace Engine Bearings, PCV Valve System (PCV) (Positive Crankcase Ventilation System), Radiator – Overheating, Causes, Consequences And Maintenance, Spark Plug Problems – Troubleshooting, Failure Symptoms, Replacement, Vacuum Leak Repair Locations – Common Causes – Common Repairs, Valve Guide Wear – Can Cause Other Major Damage, Besides Burning Oil, Defective temperature switch; coolant sensor or other sensor, Engine thermostat is stuck OPEN (engine never gets hot enough to turn on the fan), A wiring problem (blown fuse, loose or corroded connector, shorts, opens, etc. The recommended high-side and low-side … Good-luck. The radiator fan motor should activate, when you've made the last connection. Connect one end of the volt meter to a ground and the other end to the electrical connection on the fan. As valve guides wear, the side to side movement can cause valves to seat improperly. It is normal for the fan to cut in only after the car has reached a certain preset temperature, but the fan should cut in within few seconds once you start the Aircon. Remove the radiator cap from the radiator and look for any debris build up on the inside of the radiator. Locate the fuse you want to test. When it reaches that temperature; the switch closes and turns the fan(s) on. Park your car, allow the engine to cool and open the hood. Now I have it installed & all hooked up. Let's take a look at your specific test results below. Cut both wires and strip 1/2 an inch of insulation off of the ends of the two fan wires. Location: Bangalore/Mumbai. If The Fuse Is OK Move On To The Next Step. The fan clutch has a spring inside of it to help the fan spin faster. How does a car’s cooling fan work? You will now place the red probe on the common wire. With the fan mounted behind the radiator, on the other hand, the radiator receives free airflow at highway speed and the combo looks cleaner and is easier to service. If test light illuminates, go to step 14). The fan selected was a … Yesterday, I changed my radiator fluid in my 2005 Buick Lasabre. SEE NEXT: Engine Control Unit (ECU) Symptoms, Function & Location. The main purpose of Antifreeze Coolant in your engine is to remove heat. Connect one end of the 12-gauge jumper wire to the black ground wire of the fan. The three factors that determine the efficiency of a cooling system are the water-flow rate around the system, the … It’s important to maintain the fan clutch in your vehicle, as it’s responsible for testing the temperature of the air coming through the radiator and preventing the engine from overheating. The Radiator Fan Relay. If the fan doesn't work with direct battery power, examine the terminal that plugs to the radiator fan connector. BUT it seems that this just burns up the rad fan switch leading to the fan never coming on. Look for a rubber grommet in back wall (firewall) of engine compartment that has wiring going through it. & thanks for telling me bout that fire thing. Once you connect the fan to battery power, your fan should start running. Clutch driven fans run quieter, whereas direct-driven standard fans eat up horsepower and increase noise at high engine rpm. Spin the fan with your finger (make sure the vehicle and key is off). Radiator fans not running 5 Answers. Look for any restrictions like leaves, bugs or dirt that would keep air from passing over the condenser. So, You opened your coolant reservoir or the radiator cap and see that the coolant and […], The (ECT) sensor, is an engine management system sensor; that is used to monitor the temperature of the engine’s coolant. It might be mechanical or electric, but the engine drives it. ? Extra cooling is not needed when a cold engine is first started; so the engine cooling fan does not come on until the engine reaches normal operating temperature. Consequently, Some vehicles have as many as three; Consequently, with the engine running and the coolant temperature switch unplugged the fan should come on. Or the silicon grease can start to leak causing the fan clutch not to lock up allowing the fan to "freewheel", failing to pull air through the radiator when needed. Determine whether your radiator fan is manual or electric. It is uncommon for radiator fans to go bad. Remove the lid. 2. The first step is checking for a blown fuse. BUT it seems that this just burns up the rad fan switch leading to the fan never coming on. This is the best test of any system. Make up some jumper cables; connect them directly from the battery to the fan motor to see if it spins. The … Use the volt meter to test if there is power to the wires. Check a fan motor for faults Fan motor with the thermo-switch lead disconnected and test lead connected to the battery. NOTE: This tutorial on how to test the radiator fan motor complements this one: Radiator Fan Relay Test (2001-2005 1.7L Honda Civic). Use the volt meter to test if there is power to the wires. So, cooling fan motors are an important component to any engine cooling fan assembly; and play a key role in keeping the car at safe temperatures during idle and low speeds. A fan blade spinning at 3,000rpm could inflict a lot of damage if it flew off so make sure it is firmly located. If it stops working, your engine could overheat and be damaged. But it's a contributing element. With most older cars, you will need to remove the radiator to check that the fan bolts are secure as usually there is not enough room to slip in a spanner or a small socket with the radiator in place. If the volt meter reads 12 volts, the problem is not the power and the fan needs to be replaced. Older cars have glass; cylinder-shaped fuses with stainless steel on the ends and glass in the middle. How to Test a Car Fan Thermostat Switch by William Kinsey . Connect test light to battery voltage and probe cooling fan control circuit. So today we are working on my old 1964 Buick Skylark. Your car's radiator holds coolant fluid for the motor to ensure that the motor doesn't overheat. Look at the fuse box for a blown fuse. Step 3 Use the volt meter to test if there is power to the wires. The best way to test it is to bypass the fan's normal circuit and straight wire the fan to the engine. Once the air coming into the radiator has greater mass than the fan can move, the fan can become a blockage for that airflow. Use extreme caution to avoid getting injured. Picture of radiator showing side tank with cooler. Unplug the Fan Connector closest to the fan. If it doesn’t, and you have a domestic vehicle; the coolant temperature switch is a normally open type that stays open until the coolant reaches its set temperature. The easiest way to check it is; visually check it for a continuous wire with no breaks. Values measured in this phase of testing should be around fifteen ohms. The tip of the (ECT) sensor protrudes into one of the cooling system passages; and […], Antifreeze Coolant is a mixture of antifreeze agents and water; which goes into your vehicle’s cooling system to regulate the temperature. Step 2: Inspect the inside of the radiator. If you have had problems with your engine overheating, check your radiator fan and water pump. Wind powered electric generators are obscenely expensive. For more information about how to test a fan clutch, such as other signs to look for which indicate damage, read on. Locate the coolant temperature switch and unplug it. You can find this tutorial in Spanish here: Verificando El Ventilador Del Radiador (1.7L Honda Civic) (at: autotecnico-online.com). The first components that should be tested are the cooling fan, the cooling fan relay and the thermostat switch, which turns the fan on and off depending on the temperature of the engine. Kick off the engine or switch the ignition key off to IG2. Below we will cover the process necessary to complete the change of the cooling/radiator fan motor, for most cars. The radiator fan motor should activate, when you've made the last connection. … A fan failure; or a failure of the fan relay or control circuit is bad news; because it can allow the engine to overheat. Step 1 Locate the positive and negative wires on the cooling fan. Look for the cooling fan. If the fuses are intact, switch on the ignition and use a circuit tester to find if there is current at the motor terminals. If the fan clutch requires repair, take the vehicle to a qualified mechanic. I drove the car about ten miles today, and noticed that the engine was getting a bit hotter than normal. If the fan doesn't work with direct battery power, examine the terminal that plugs to the radiator fan connector. To check an electric radiator fan, start the car and let it get up to the temperature where the fan normally kicks on. The cooling fan resistor is an electrical resistor that limits power to the fan in steps, so that the fan can operate at different speeds according to the cooling system’s demands. The shroud helps to direct airflow through the radiator core for better efficiency. If so do you know if they come in different temperature turn-on specifications? Keep in mind, this article is meant to cover a broad range of vehicles and is written in a way that will give a general overview of the process. Radiator. Then test for incoming voltage at the terminal with your digital multimeter (DMM). If test light illuminates, go to step 13). This will be your install option to get your new wires through the firewall and behind dashboard. Here’s how to test the radiator fan fuses with a multimeter. Check to see that the cooling fans on the condenser or radiator are running when the air conditioning is on. Why are radiator fans not … If you ignore the problem and let your engine overheat, you run the risk of ruining your engine completely. A radiator fan requires an average of 15 amps to operate. Without it, air tends to flow around the radiator, failing to remove most of the heat from the coolant inside the radiator. Set the multimeter’s meter to ‘20’ in the DCV section as you will be testing 12V circuits. BHPian . After I returned home I noticed the electric radiator fan was still running even after I shut the enging off. Bummer. There are several advantages to this type of radiator fan, not the least of which is that it eliminates all the potential problems that go with a complicated electrical system. A radiator is a type of heat exchanger. I'd like to do as described here, but with the relay, and I would like to have my cooling fan turn on at 160, or 180 degrees in the summer and a higher temperature in the … When the correct parameters are met, a temperature switch or the computer will activate … Let's take a look at your specific test results below. As not to run my battery down, I open the fuse and … Locate the positive and negative wires on the cooling fan. The best way to test it is to bypass the fan's normal circuit and straight wire the fan to the engine. In general; most vehicles on the road have two types of fuses. A car’s fan is designed to enhance the radiator’s cooling efficiency by pulling extra air through the radiator at low vehicle speeds. are they working on external battery or through force of air as the car moves....If they work on external battery, when the car is at high speed the radiator fan can freely move without external supply at that time,can the radiator fan motor can be used as generator and power is stored in battery? Then test for incoming voltage at the terminal with your digital multimeter (DMM). Part 1 of 5: Remove the cooling/radiator fan assembly. Since power to the cooling fan is sometimes routed through the cooling fan resistor, when it fails or has any problems , it can cause issues with the regular operation of the fans, which can lead to overheating. If your car’s radiator fan is non-functional first check your car’s user manual and locates the fuse for the radiator fan. The radiator fan has three important electrical components that give it its performance: the fan motor, the relay, and the resistor. Why Clean the Battery Fan? It worked fine. Pull the cooling fan relay out of the box. Kick off the engine or switch the ignition key off to IG2. But most if not all modern radiator motors lack permanent magnets so that when you spin the fan, nothing is generated except a light sweat. Step 3: Check for external clogs. Radiator fans not working 9 Answers. A problem with any of these three components can cause a problem with the fan, so it is best to test their integrity before making any repairs or replacements. The first components that should be tested are the cooling fan, the cooling fan relay and the thermostat switch, which turns the fan on and off depending on the temperature of the engine. While a swollen pack does not represent a safety concern, damaged or swollen components should not be used. Your engine cooling fan will not work if you have a blown fuse. Yesterday, I changed my radiator fluid in my 2005 Buick Lasabre. If your radiator fan is solid mounted and the fan is not working, your belt is bad and needs to be replaced. Using a multimeter is another good way. Look at the fan and make sure there is no obstruction in front of the radiator blocking airflow. These switches open when the set temperature is reached thus turning the fan(s) on. I took the care around the block to see if it was just a fluke thing but the fan stayed running after I shut the engine off and did not stop. As a resistor restricts the flow of current, it creates a large amount of heat. There are a number of common problems with radiator fans, and if your vehicle has one of them, fixing it is relatively quick and cheap to administer. Inspect the front of the radiator and look for any debris clogging the outside of the radiator. 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). Step 4. I wired my radiator fan directly to my battery on a suggestion from a reputable VW aircooled and diesel mechanic my dad takes his cars to. Valve leakage causing compression loss is another […]. Look for corrosion and damage. I really would rather have it manuel because the guy I got the car from has some horrible wiring and the rad fan fuses might be blown. Some cars can look a bit ugly with a fan up front, and the fan can impede airflow at highway speed. I guess the idea is that a blown fuse or faulty wiring would never lead to the fan not working and thus the car overheating. If the car begins to overheat and the fans never kicked on, the issue is either the cooling fan motor itself, or the relay that controls it. Fan shroud missing: Many car owners frequently miss this one. A second terminal becomes hot only when the key is on. In most cases, the water pump is bad and isn't pumping fresh fluids. Connect one end of the volt meter to a ground and the other end to the electrical connection on the fan. The fan uses a relay in the fuse relay box under the hood. You’ll hear people talk about how their car is fine on the freeway but no good in the suburbs. If the fan on your radiator is not working properly, it can't circulate air through the radiator to cool the fluid and subsequently cool off the motor. Step 2 . Step 4: Test the fan motor. Since the fan motor isn't activating on its own... the next step is to check the radiator fan motor switch. Consequently, if it does not spin it is blown. Consequently, if it does not spin it is blown. Check the cabin air filter to ensure that it is not clogged. With the engine running and at operating temperature, touch the terminal positive and ground with the respective multimeter probes, you should get running voltage … Most of the images displayed are of unknown origin. > For instance, there are three radiator fans, three water pumps, four > thermostatic switches and seven relays for the engine cooling > system. The cooling fan relay is the relay that controls the engine’s cooling fans. If It Is Working; Move On To The Next Step. Using scan tool, command cooling fan on. If the fuse is blown simply replace it and that should solve the issue for you. Note: Like most laptops, Dell laptops use lithium-ion batteries, which can swell due to battery age, the number of charge cycles, or exposure to high heat. I took it to the car wash today it has been 28 degrees here in NJ. This terminal cannot be used for the fan because it is designed to carry low amperage from the key, and if the fan is … The cooling fan resistor is an electrical resistor that limits power to the fan in steps, so that the fan can operate at different speeds according to the cooling system’s demands. Repair if necessary and use dielectric grease on the terminals. The fan may work but it only runs at low speed; which may not be fast enough to prevent overheating. We do not intend to infringe any legitimate intellectual right, artistic rights or copyright. The relay has four terminals--one that is hot all the time, even with the key off. Your car’s cooling fan, or radiator fan, plays an important job in keeping your engine cool. 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). Make sure the belt is in good condition and has tension. Since my engine is not stock (1971 Riviera 455 cubic inch big block the cooling fan previously that was installed is just not enough to cool it down. To check this, unplug the single wire connector and, using a jumper wire, ground it. Thus, being in a large airflow area makes sense not only to extend the life of the resistor, but also to keep from causing … Most Japanese cars have a normally closed switch. I drove the car about ten miles today, and noticed that the engine was getting a bit hotter than normal. Unplug the Fan Connector closest to the fan. Materials Needed. To check an electric radiator fan, start the car and let it get up to the temperature where the fan normally kicks on. Check #6 – Faulty radiator cooling fan. – Why Do You Need It ? I was wondering if it was possible to grab a car radiator fan (which has a 12V DC motor), face it into the wind, and turn the motor into a generator. Of course, not all radiator fans are electrically operated, and a large percentage of vehicles use radiator fans that are driven through viscous couplings. Most newer cars have a different style of fuse that uses a plastic housing; with the fusible link encased in the housing. The fan will discharge the battery quickly if left running. The radiator fan should be running at more RPMs than the motor. If the fans were not spinning normally, the issue is either the electric motor that turns the fan, or the relay that triggers the fan to come on. Be sure you have the right one. I hot wired the radiator cooling fan prior to installing it in my car. It is designed to transfer heat from the hot coolant that flows through it to the air blown through it by the fan. If the volt meter … I have it set where I connect the negative wire to the battery when im ready to go, then pop the hood and disconnect it when I turn the car off. To check for this condition the engine must be off, inspect the fan clutch for leakage at the front or rear of the unit (input shaft and temperature controlled expansion spring). The battery-cooling fan does its job hidden behind the interior trim panels in the rear cargo space of the Prius. If the volt meter reads that there is no power, check your fuses. When vehicle cooling system problems arise, each component should be tested to verify that it is operating correctly. If it is not, the fan clutch is bad and needs to be replaced. Electric radiator fans operate when radiator temperature rises to preset heat range. Check the fuses one by one. Cut both wires and strip 1/2 an inch of insulation off of the ends of the two fan wires. Join Date: Apr 2007. This is the terminal that actuates the relay. Yesterday, I changed my radiator fluid in my 2005 Buick Lasabre. I guess the idea is that a blown fuse or faulty wiring would never lead to the fan not working and thus the car overheating. Replace the cooling fan relay with a new one. Source: AudiWorld. The … Most fans should come on when the coolant reaches about 200 to 230 degrees. When the engine temperature rises higher than normal, inspect the cooling fan. Got it... Finding a garage is another 'penidng item' for me in Andheri (e) ever since I … CASE 1: The radiator fan motor came on. Most modern cars use aluminum radiators. This is the terminal that actuates the relay. Connect test light battery voltage and probe cooling fan control circuit. > > The quickest way to begin trouble shooting this system is to use the > Coolant Fan Test Connector located in the triangular shaped > relay/fuse box just behind the car battery. Check the electrical connection at the fan. Step 1. Normal voltage for a radiator fan is around 12 volts. Make sure that the four bolts holding the radiator fan are tight. Copyright 2021 Leaf Group Ltd. / Leaf Group Media. Then test the fan clutch by giving it a good push. When vehicle cooling system problems arise, each component should be tested to verify that it is operating correctly. I ran th Remember that a blown fuse can mean that your fan is turning roughly and it might need to get replaced if the fuse gets blown again. This means that their cooling system does not have enough thermal capacity. Since power to the cooling fan is sometimes routed through the cooling fan resistor, when it fails or has any problems , it can cause issues with the regular operation of the fans, which can lead to overheating. Radiator fans not running 5 Answers. If test light does not illuminate, go to step 21). I drove the car about ten miles today, and noticed that the engine was getting a bit hotter than normal. I wired my radiator fan directly to my battery on a suggestion from a reputable VW aircooled and diesel mechanic my dad takes his cars to. The radiator fan does a very important job; it cools the radiator to stop the car from overheating. Here’s how to test the radiator fan fuses with a multimeter. Erin has a Bachelor of Arts degree in English with an editing minor from Brigham Young University in Provo, Utah. How to Test a Car Fan Thermostat Switch by William Kinsey . When the radiator temperature lowers to a preset level, the electric fan turns off. Cars or trucks with 8 cylinders require much fans with much higher CPMs than 6 or … Step 3. When you say "Thermostat for the switch", do you mean a Temperature Sensor Switch of some type or Cooling Fan Switch that mounts on the engine or radiator. In conclusion. A manual radiator fan is bolted to the water pump and runs off of the same belt as the water pump. Battery-powered radiator fans, which we will be reviewing below, are not as prone to breaking compared to mechanical fans. 11. If leakage is observed the fan clutch has failed and needs replacing. When the cooling fan fails, your engine overheats. Most of these cooling fan resistors will be mounted onto the radiator cooling fan assembly so that they can be in an area that gets a large amount of air flow. As you're probably already aware, the radiator fan motor is one of the principal components that helps … Some manual radiator fans have a fan clutch. If your radiator fan has a fan clutch, check the radiator fan while the motor is running. (30th December 2008, 17:32 #5: weejai. CASE 1: The radiator fan motor came on. Without it, air tends to flow around the radiator, failing to remove most of the heat from the coolant inside the radiator. Look for corrosion and damage. The volt meter will then give you a voltage reading. Decide on best location to install switch and drill hole to accommodate the installation. this is … At this point the fan should come on. Connect the other end of that wire to the engine block or any metal … Toyota doesn't require or suggest cleaning this fan as part of a regular maintenance schedule, and most people won't ever need to. Testing and Repairing the Radiator Fan. An electric radiator has wires that connect it to the car's electrical system. So, The fan runs mostly at idle or low speed when the engine is at normal temperature. Some radiator fans are solid mounted, with no fan clutch. Open the hood and locate the fuse relay box on the driver's fenderwell. ). The first step in adding a switch to a radiator fan is to disconnect the battery's negative terminal. Replace it and you are back on the road. Test the fourth set of wires: Engine Antifreeze Coolant – What Does It Do ? Since the fan motor isn't activating on its own... the next step is to check the radiator fan motor switch. The output of your replacement radiator fan will vary depending on how many cylinders are in your car’s engine. First, see if you can detect any problems with the fan clutch while you’re driving. Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool. Posts: 88 Thanked: 3 Times View My Garage. But it's a contributing element. Start the car and let the engine warm up. Park the car. The relay has four terminals--one that is hot all the time, even with the key off. It should be roughly 12 volts. By itself, a missing fan shroud doesn't cause the engine to overheat. In general there are six things that may prevent an electric cooling fan from coming on; On most systems; there is a coolant temperature switch that turns the fans on and off. Now find the red wire … by Karim Nice. if you suspect that your cooling fan motors may be having an issue; start doing some testing to see if you can fix it yourself. The fan will then cycle on and off as needed to maintain the proper coolant temperature. To check a radiator fan, you will be dealing with a part of the motor that has a lot of moving parts. Adding a manual switch can essentially be a one-two punch, once you know what you're looking for. It is designed to be in a heavy air flow area. Radiator fans not running 5 Answers. If you have problems with the radiator fan, you need to take care of them immediately or you could cause serious damage to your car. Erin Stewart is a professional editor and copywriter who has served as a newspaper reporter, designer, and news editor, and currently works as part of a dynamic marketing communications team. COPYRIGHT © 2021 DANNYSENGINEPORTAL.COM BY DANNY BENDER - DISCLAIMER: All wallpapers and backgrounds found here are believed to be in the "public domain". This test result tells you that the radiator fan motor is good. Yes, you can power the fan from the battery momentarily to see if the fan works, however powering it continuously from the battery is a bad idea. All well and good in theory. For a manual radiator fan, conduct a visual inspection first. A second terminal becomes hot only when the key is on. Radiator fan output is in cubic feet per minute, or CPM. Examine the blades for trueness. Replace it and you are back on the road. If you are the rightful owner of any of the pictures/wallpapers posted here, and you do not want it to be displayed or if you require a suitable credit, then please contact us and we will immediately do whatever is needed either for the image to be removed or provide credit where it is due. , you will need to get back on the road tested easily … this is … Here ’ operating. Blown fuse: Verificando El Ventilador Del Radiador ( 1.7L Honda Civic ) ( at: )... Light or in a heavy air flow area your engine cooling fan control circuit work you. Allow the engine temperature rises higher than normal remove most of the of. 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'Ve been monitoring the tem... 2005 Buick LeSabre-Maintenance & repair it installed & all hooked up overheat after at. … this is … Here ’ s meter to a preset level, the water pump and off. Output is in good condition and has tension flow around the radiator fan is around 12 volts it. Determine whether your radiator fan requires an average of 15 amps to operate fan has fan. Preset level, the fan normally kicks on, [ … ], valve guide wear refers excessive. Heat range owners frequently miss this one can keep the engine or switch the ignition key off not work you. Blown so you will be dealing with a battery pack swelling, Dell recommends discontinuing using the to... Engine overheating, check your radiator fan has a spring inside of fuses... Seat improperly and use dielectric grease on the multimeter the cooling fan relay out of the box fan assembly reduces. Are made by brazing thin aluminum fins to flattened aluminum tubes... the next step is checking a! Touch the red probe to either of the lid and for the mapping of the radiator fan should... Had problems with the key is on see next: engine control (... Are commonly controlled using relays the ignition key off adding a manual radiator fan, you will testing... Modern vehicles use electric motors that have a moderate to high current draw, and noticed that engine. Your fan should start running has wiring going through it to the wires 's circuit! Burns up the rad fan switch leading to the car about ten miles,... Next: engine control Unit ( ECU ) Symptoms, Function & location many car frequently... That should solve the issue for you stainless steel on the common wire leaves, or. Infringe any legitimate intellectual right, artistic rights or copyright the fuse is OK Move on to the where... While the motor does n't work with direct battery power, check your fuses and locate the positive and wires.