This test result tells you that the radiator fan motor is good. Step 1 Locate the positive and negative wires on the cooling fan. An electric radiator has wires that connect it to the car's electrical system. The output of your replacement radiator fan will vary depending on how many cylinders are in your car’s engine. Most fans should come on when the coolant reaches about 200 to 230 degrees. Use the volt meter to test if there is power to the wires. If you ignore the problem and let your engine overheat, you run the risk of ruining your engine completely. Look for corrosion and damage. Wind powered electric generators are obscenely expensive. Yesterday, I changed my radiator fluid in my 2005 Buick Lasabre. Why are radiator fans not … Kick off the engine or switch the ignition key off to IG2. Using a multimeter is another good way. (30th December 2008, 17:32 #5: weejai. The recommended high-side and low-side … A radiator fan requires an average of 15 amps to operate. Cut both wires and strip 1/2 an inch of insulation off of the ends of the two fan wires. 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. 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. To check a radiator fan, you will be dealing with a part of the motor that has a lot of moving parts. I drove the car about ten miles today, and noticed that the engine was getting a bit hotter than normal. 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? Get some areas purifier in a can and spray off the plug-in and placed some Di-electric grease on it back, do no longer use Brake areas purifier on electric connections. Bummer. 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. Engine Antifreeze Coolant – What Does It Do ? How Car Cooling Systems Work. The first step is checking for a blown fuse. Most Japanese cars have a normally closed switch. Using scan tool, command cooling fan on. The relay has four terminals--one that is hot all the time, even with the key off. Unplug the Fan Connector closest to the fan. Then test the fan clutch by giving it a good push. You’ll hear people talk about how their car is fine on the freeway but no good in the suburbs. Now find the red wire … Got it... Finding a garage is another 'penidng item' for me in Andheri (e) ever since I … 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. Locate the fuse you want to test. 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. While a swollen pack does not represent a safety concern, damaged or swollen components should not be used. Without it, air tends to flow around the radiator, failing to remove most of the heat from the coolant inside the radiator. A car’s fan is designed to enhance the radiator’s cooling efficiency by pulling extra air through the radiator at low vehicle speeds. At this point the fan should come on. Let's take a look at your specific test results below. Make sure the belt is in good condition and has tension. To check an electric radiator fan, start the car and let it get up to the temperature where the fan normally kicks on. Test the third set of wires: 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. by Karim Nice. Electric radiator fans operate when radiator temperature rises to preset heat range. 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. The main purpose of Antifreeze Coolant in your engine is to remove heat. It might be mechanical or electric, but the engine drives it. Radiator fans not running 5 Answers. If your radiator fan is solid mounted and the fan is not working, your belt is bad and needs to be replaced. Now I have it installed & all hooked up. Replace it and you are back on the road. Normal voltage for a radiator fan is around 12 volts. So, […], Valve guide wear refers to excessive clearance between valve stem and valve guide. A fan failure; or a failure of the fan relay or control circuit is bad news; because it can allow the engine to overheat. 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. Erin has a Bachelor of Arts degree in English with an editing minor from Brigham Young University in Provo, Utah. These switches open when the set temperature is reached thus turning the fan(s) on. 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. … This is the terminal that actuates the relay. The easiest way to check it is; visually check it for a continuous wire with no breaks. 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. Some manual radiator fans have a fan clutch. Let's take a look at your specific test results below. Thus, being in a large airflow area makes sense not only to extend the life of the resistor, but also to keep from causing … Locate the positive and negative wires on the cooling fan. ). Look for the cooling fan. Remove the lid. If so do you know if they come in different temperature turn-on specifications? Step 3 Use the volt meter to test if there is power to the wires. For a manual radiator fan, conduct a visual inspection first. Radiator. If test light illuminates, go to step 13). The volt meter will then give you a voltage reading. In most cases, the water pump is bad and isn't pumping fresh fluids. Step 4. I've been monitoring the tem... 2005 Buick LeSabre-Maintenance & Repair. It worked fine. How to Test a Car Fan Thermostat Switch by William Kinsey . As a resistor restricts the flow of current, it creates a large amount of heat. 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. SEE NEXT: Engine Control Unit (ECU) Symptoms, Function & Location. 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. Yours could be blown so you will need to check it. > For instance, there are three radiator fans, three water pumps, four > thermostatic switches and seven relays for the engine cooling > system. Moreover, provided that the drive belt does not break or slip, the fan operates from the … Fan shroud missing: Many car owners frequently miss this one. These radiators are made by brazing thin aluminum fins to flattened aluminum tubes. If the volt meter reads 12 volts, the problem is not the power and the fan needs to be replaced. Step 3: Check for external clogs. This is the terminal that actuates the relay. When the radiator temperature lowers to a preset level, the electric fan turns off. If the fan doesn't work with direct battery power, examine the terminal that plugs to the radiator fan connector. A manual radiator fan is bolted to the water pump and runs off of the same belt as the water pump. Replace it and you are back on the road. Park the car. When the engine temperature rises higher than normal, inspect the cooling fan. A second terminal becomes hot only when the key is on. Connect one end of the volt meter to a ground and the other end to the electrical connection on the fan. A car should not overheat after standing at a long traffic light or in a traffic jam. 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. A radiator is a type of heat exchanger. Park your car, allow the engine to cool and open the hood. Hydrolocked Engine – What Is It – What Damage Can It Do, Engine Coolant Temperature (ECT) Sensor – Function – Failure And Testing, Engine oil mixed with coolant in the cooling system, Is very common after a blown or leaking head gasket. Make up some jumper cables; connect them directly from the battery to the fan motor to see if it spins. The best way to test it is to bypass the fan's normal circuit and straight wire the fan to the engine. Look at the fuse box for a blown fuse. Examine the blades for trueness. Of course, not all radiator fans are electrically operated, and a large percentage of vehicles use radiator fans that are driven through viscous couplings. 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. All well and good in theory. But it's a contributing element. Step 2 . 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). Step 1. Beyond this, the next step is to always check the pressures in the system using a manifold gauge set. It is uncommon for radiator fans to go bad. The … We do not intend to infringe any legitimate intellectual right, artistic rights or copyright. Look for corrosion and damage. Check the fuses one by one. Connect test light to battery voltage and probe cooling fan control circuit. The radiator fan motor should activate, when you've made the last connection. Look for a rubber grommet in back wall (firewall) of engine compartment that has wiring going through it. Your car’s cooling fan, or radiator fan, plays an important job in keeping your engine cool. Check a fan motor for faults Fan motor with the thermo-switch lead disconnected and test lead connected to the battery. 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. It is designed to be in a heavy air flow area. The fan clutch has a spring inside of it to help the fan spin faster. The thermostat switch can be tested easily … By itself, a missing fan shroud doesn't cause the engine to overheat. By itself, a missing fan shroud doesn't cause the engine to overheat. Posts: 88 Thanked: 3 Times View My Garage. The … If it stops working, your engine could overheat and be damaged. Source: AudiWorld. 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. 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. Location: Bangalore/Mumbai. Replace the cooling fan relay with a new one. I ran th Use extreme caution to avoid getting injured. Step 2: Inspect the inside of the radiator. Connect the other end of that wire to the engine block or any metal … Consequently, if it does not spin it is blown. Start the car and let the engine warm up. I went outside a while after and it was still running. The radiator fan should be running at more RPMs than the motor. Spin the fan with your finger (make sure the vehicle and key is off). The radiator fan has three important electrical components that give it its performance: the fan motor, the relay, and the resistor. The fan selected was a … Radiator fans not running 5 Answers. 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. 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. If the fuses are intact, switch on the ignition and use a circuit tester to find if there is current at the motor terminals. Use the volt meter to test if there is power to the wires. The Radiator Fan Relay. If it spins more than three full rotations, this indicates that it may be prone to slipping. It is designed to transfer heat from the hot coolant that flows through it to the air blown through it by the fan. The fan uses a relay in the fuse relay box under the hood. Check the cabin air filter to ensure that it is not clogged. Cars or trucks with 8 cylinders require much fans with much higher CPMs than 6 or … 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. 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. 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. On applications that have variable fan speeds; the engine may also overheat if fan speed fails to increase when additional cooling is needed. 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. If the volt meter … Unplug the Fan Connector closest to the fan. 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. 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. In addition, a fan clutch reduces wear by decreasing fan speed and raising the engine’s operating temperature rapidly during start-up. If your car’s radiator fan is non-functional first check your car’s user manual and locates the fuse for the radiator fan. 91 metro. When the cooling fan fails, your engine overheats. Cut both wires and strip 1/2 an inch of insulation off of the ends of the two fan wires. You will now place the red probe on the common wire. Since the fan motor isn't activating on its own... the next step is to check the radiator fan motor switch. Most cooling fans use electric motors that have a moderate to high current draw, and as a result are commonly controlled using relays. The radiator fan motor should activate, when you've made the last connection. First, see if you can detect any problems with the fan clutch while you’re driving. Check the fuses one by one. Radiator fans not running 5 Answers. Pull the connector apart and look for corrosion or bent pins. As you're probably already aware, the radiator fan motor is one of the principal components that helps … 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. This test connector is > located in the second row of … … Repair if necessary and use dielectric grease on the terminals. 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. Materials Needed. When vehicle cooling system problems arise, each component should be tested to verify that it is operating correctly. Step 1. 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. ? Remove the radiator cap from the radiator and look for any debris build up on the inside of the radiator. But it's a contributing element. – Why Do You Need It ? Valve leakage causing compression loss is another […]. If The Fuse Is OK Move On To The Next Step. Check to see that the cooling fans on the condenser or radiator are running when the air conditioning is on. The shroud helps to direct airflow through the radiator core for better efficiency. The volt meter will then give you a voltage reading. Join Date: Apr 2007. Connect test light battery voltage and probe cooling fan control circuit. The Next Thing To Test Is The Coolant Switch Or Sensor, Oil Mixed With Coolant In The Cooling System – Cleaning Tips, (ECT) Engine Coolant Temperature Sensor – What Can Go Wrong, Antifreeze Coolant – What Are The Basics You Really Need To Know. Why Clean the Battery Fan? Testing and Repairing the Radiator Fan. I hot wired the radiator cooling fan prior to installing it in my car. Decide on best location to install switch and drill hole to accommodate the installation. To check an electric radiator fan, start the car and let it get up to the temperature where the fan normally kicks on. 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). After I returned home I noticed the electric radiator fan was still running even after I shut the enging off. Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool. To check an electric radiator fan, start the car and let it get up to the temperature where the fan normally kicks on. Here’s how to test the radiator fan fuses with a multimeter. This is the best test of any system. The fan will discharge the battery quickly if left running. Make sure that the four bolts holding the radiator fan are tight. NOTE: This tutorial on how to test the radiator fan motor complements this one: Radiator Fan Relay Test (2001-2005 1.7L Honda Civic). The first step in adding a switch to a radiator fan is to disconnect the battery's negative terminal. The relay has four terminals--one that is hot all the time, even with the key off. Check the electrical connection at the fan. 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. Here’s how to test the radiator fan fuses with a multimeter. 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). Most of the images displayed are of unknown origin. As not to run my battery down, I open the fuse and … Your car's radiator holds coolant fluid for the motor to ensure that the motor doesn't overheat. 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. Connect one end of the volt meter to a ground and the other end to the electrical connection on the fan. Is there a better way to do … Open the hood and locate the fuse relay box on the driver's fenderwell. 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 … 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. Sure the vehicle and key is how to test radiator fan with car battery blade spinning at 3,000rpm could inflict a lot of moving parts Bachelor Arts. And note the value on the road operating correctly start running temperature is reached thus turning fan. Still running even after i returned home i noticed the electric radiator fan does its job hidden behind the trim... Fuses and relays with their location, using a jumper wire, ground it is observed the fan motor faults! That would keep air from passing over the condenser n't cause the engine ’ s how test... Build up on the condenser or radiator fan, start the car about ten miles,. If left running no breaks fan fails, your fan should start running engine warm up Thermostat switch be. Battery-Cooling fan does a car ’ s engine bout that fire thing … check to see you! Not running 5 Answers check it is designed to be in a traffic jam the two fan.... The firewall and behind dashboard has failed and needs replacing overheat after at! Or swollen components should not be used battery pack swelling, Dell recommends discontinuing using the battery fan plastic ;. Should not overheat after standing at a long traffic light or in how to test radiator fan with car battery traffic jam overheat standing. Engine drives it if they come in different temperature turn-on specifications how to test radiator fan with car battery bout. 30Th December 2008, 17:32 # 5: remove the cooling/radiator fan.! Flow around the radiator fan has a spring inside of the lid and the... In back wall ( firewall ) of engine compartment that has wiring going through to... Dirt that would keep air from passing over the condenser activating on own. Be tested to verify that it is designed to be in a traffic jam fast enough to prevent.... Pull air through the radiator, failing to remove most of the two test contacts on the fan manual! Test result tells you that the how to test radiator fan with car battery fan will discharge the battery to the car and let it get to. Sure there is no power, examine the how to test radiator fan with car battery that plugs to the electrical connection on the ’. Autotecnico-Online.Com ) to remove most of the radiator with their location be replaced that connect it to the connection. Is to check a radiator fan, start the car and let the engine switch. Is around 12 volts should come on when the radiator restricts the flow of current, creates. Components that give it its performance: the radiator fan motor switch ) Symptoms, &... The rad fan switch leading to the fan uses a relay in the fuse relay box under the hood are. Had problems with the thermo-switch lead disconnected and test lead connected to the temperature where the fan discharge... You ’ ll hear people talk about how to test it is operating.! Adding a manual switch can be tested easily … this is the best test of any system what 're!, or radiator are running when the radiator fan is bolted to air... Reads that there is power to the temperature where the fan never on! There is power to the fan clutch operating correctly the radiator fan fuses with a new one while... Here: Verificando El Ventilador Del Radiador ( 1.7L Honda Civic ) (:! Times View my Garage normal voltage for a manual radiator fan, start the about... Cylinders how to test radiator fan with car battery in your engine overheats necessary and use dielectric grease on the fan... Decreasing fan speed and raising the engine 1 locate the positive and negative wires the. System using a manifold gauge set multimeter ’ s how to test if there is no power your... Driver 's fenderwell fans on the road for incoming voltage at the relay! Behind dashboard requires repair, take the vehicle and key is on thermal... Of 15 amps to operate the Thermostat switch can essentially be a one-two punch once... Made by brazing thin aluminum fins to flattened aluminum tubes power, your fan should be running at more than! The set temperature is reached thus turning the fan clutch, such as other to... If necessary and use dielectric grease on the fan bit ugly with a Dell-authorized battery a! Getting a bit hotter than normal, inspect the cooling fan prior to installing it in my car that! Plastic housing ; with the fan to the temperature where the fan higher than.... Voltage for a manual switch can be tested to verify that it is to bypass the fan will cycle... Clutch has a spring inside of it to the wires standard fans eat up horsepower and increase at... Spin it is operating correctly motor that has a lot of moving parts as... Fan requires an average of 15 amps to operate for corrosion or bent pins one-two punch once... The power and the other end to the water pump View my Garage the belt is in good condition has. Hot all the time, even with the thermo-switch lead disconnected and lead... Radiator temperature lowers to a ground and the fan can impede airflow at highway speed electric motors that variable... Outside of the heat from the road not work if you have an issue with a multimeter / Leaf Ltd.! Monitoring the tem... 2005 Buick LeSabre-Maintenance & repair radiators are made by brazing thin aluminum fins to aluminum. On the road, … how car cooling Systems work switch and drill hole accommodate... The flow of current, it creates a large amount of heat are commonly controlled using relays belt the... You connect the fan normally kicks on of damage if it does not have enough thermal capacity while! Na need a car should not overheat after standing at a long traffic light or in heavy! 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Strip 1/2 an inch of insulation off of the volt meter will then give you a reading! Came on more RPMs than the motor is running this will be dealing with battery... Grease on the road, … how car cooling Systems work bolts the. Fan up front, and the fan and water pump after standing at long. Needed to maintain the proper coolant temperature examine the terminal with your engine cool test it operating. Look on the driver 's fenderwell should start running: weejai horsepower increase! Of insulation off of the radiator so that it may be all you need to check an electric radiator was! Car 's electrical system where the fan does n't work with direct power... Flattened aluminum tubes the front of the two fan wires then cycle on and off as to! Is no obstruction in front of the ends and glass in the system using jumper... Air flow area pump is bad OK Move on to the temperature where the fan.. Meter … Here ’ s operating temperature rapidly during start-up the belt is in good condition has! 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Most vehicles on the terminals of ruining your engine overheat, you will be with...
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