You will be able to find the right tools for this procedure in basically any local hardware store at a pretty low price. The fan uses a relay in the fuse relay box under the hood. The experts at Mishimoto have created this instructional "How-To Wire A Fan" Do-It-Yourself video guide to help you every step of the way. To do this we are using a thick-core heavy-duty radiator, Cool Craft custom fan shroud with a Spal 16-inch electric fan, 180° thermostat, 185° Spal fan control kit, 16-lb pressure radiator cap and stainless steel overflow reservoir. You want one that covers as much of the radiator core as possible. Many owners operate electric fan(s) independently of the PCM by triggering a relay through either the A/C compressor clutch circuit or through a trinary pressure switch. Copyright 2021 Leaf Group Ltd. / Leaf Group Media, Wire butt connectors and spade connectors. As we can see from its usage, an electric fan is extremely useful and therefore needs to be properly installed. The fan must have a 10-gauge wire to carry this amount of amperage. Check the connector plug for a clip extending from the male end of the plug to the female end, which is secured on the fan shroud. You need to hard wire the radiator fan to a toggle switch on the dash in such a manner that the fan will shut off when the ignition key is off. yes, i was not worried about the lights going out and the fan manafacturer did want a 3a fused unit used. How to Install Electric Radiator Cooling Fan: All You Need to Know! Many Flex-a-lite electric fans can be reversed, so they can be used as either a pusher fan (an auxiliary fan mounted to the front of the radiator) or a puller fan (primary cooling fan, mounted behind the radiator). On applications that have variable fan speeds; the engine may also overheat if fan speed fails to increase when additional cooling is needed. Make sure to check out some of other Do-It-Yourself videos to keep your ride out of the shop and out on the track. 2021 © Auto Cured • All Rights Reserved, Best Pinion Depth Tool Reviews: Recommended in 2021. Install the inside toggle switch where convenient. One of the cheapest and best ways to choose a fan would be to transfer a fan, which was previously used on some other piece of machinery that is similar to yours, to your own desired gear. Electric fans, also sometimes referred to as “e-fans”, are devices that are used to keep machinery or the parts of a car engine that generate heat cool. This is the terminal that actuates the relay. A radiator fan requires an average of 15 amps to operate. (refer to the illustration on wiring diagram page) secure the assembly to the radiator. Using the hardware supplied. Just like an electric fan needs to be sized to a radiator, a radiator needs to be sized to an engine. Attach the fan to the small area around the core Of the radiator where there is a metal lip that is approximately 1/4" to 3/8". In this section, we’ll detail the entire process step-by-step for you. The very first thing that you will need to do before you get started on setting up your cooling fan is to choose the right type of fan for your desired piece of machinery, whether it be your car or some other engine. When shopping for an electric radiator, you need to consider many factors. Of course, even if your fan does not have a shroud, it will still cool your desired engine but only at a very slow rate, to the point where it might seem like the cooling fan is not doing anything at all. Using the existing fan — with the shroud removed — should give a good idea of how large of a fan will fit. Now that we are clear about whether or not our fans should have shroud and what kind of fan would be the best for usage on any engine, let us move on to see how these cooling fans can be installed in order to make sure that they can perform their best at any time of the day. Direct Connection of the Radiator Fan In PAKISTAN most of the cars have this problem that their radiator fan starts directly when the car is started regardless of the water temperature in the radiator, because the fan (electrically driven) circuit is by passed from the thermostat switch. Being relatively lightweight, the fan can be set up rather easily. A fan failure; or a failure of the fan relay or control circuit is bad news; because it can allow the engine to overheat. Since the wire is now connected we need to do a safety tip! Now easily tape the wires and butt connection to hold it in place. Amazon, the Amazon logo, AmazonSupply, and the AmazonSupply logo are trademarks of Amazon.com, Inc. or its affiliates. Lastly, you should add a relay to your cooling system to turn the fan on and off. Install switch in chosen location. Flex-a-lite makes several fans that have an open shroud design to allow for airflow, which is ideal for this use. An electric fan uses a single-pole, single-throw toggle switch with an amperage rating higher than or equal to the fan motor's amperage rating. If you want to make the brackets, do make sure that you cut a couple of slabs of 3MM steel. Moreover, another fault with this idea is that a car's temperature gauge might be faulty and hence give inaccurate readings. Once the radiator is out and the fan clutch is removed, install the provided washers on the bolts where the fan clutch used to be. The function of the car radiator fan Do make sure that you keep your thermostat clean because they tend to get sticky once dirty. Follow along in the January 2013 issue of Super Chevy Magazine. How to Remove Fan Clutch without Tool Like a Pro, Best Windshield for Street Glide: Review & Buying Guide 2021, The fan should be able to move at least 2500 CFM (cubic feet per meter) of air from the equipment it is fit on. Remove the radiator fan relay from the fuse and relay box on the fender well. There are many aftermarket electric fans available, but few have been proven to cool well enough to be used on the rotary. You will find this type of car radiator fan in the majority of modern cars. When This TR6 electric fan project came along, I could not ignore the modern fan control circuits that are already in … Part numbers 112, 114 and 116 range in size from approximately 13-16 … The fan can also be turned off manually when cruising to extend the life of the fan. If you wish to opt for an easier path when mounting your cooling fan, you can simply do so by securing the fan in place with the radiator with zip ties. Electric fans are commo… If the fan motor starts to run - replace the switch (drain the coolant first). This, in turn, leads many people to believe that maybe cooling fans do not actually work. The PermaCool "finger chopper" has also been used with success, but it lacks a shroud to direct airflow and has sharp metal blades (hence the name). The BlackMagic fan is a good choice, and comes with a built in thermostat (important). Locate the electrical wiring plug connector on the radiator fan. Engine Cooling Fan Issues. Of course, the mounting configuration of your fan will need to be one that would allow this. Instead, secure the fan to the end tanks of the radiator, which is made to be more durable and will therefore be able to withstand more weight or pressure. How to Install Electric Radiator Cooling Fan: All You Need to Know! It provides 2,320 cfm of air flow. Auto Cured is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. Take some zip ties and tie them to a stationary place in your engine bay! What to look for in an electric radiator. Test the relay terminals for power with the ignition key off (use the voltmeter). A more powerful electrical fan can draw air through multi row radiators and air conditioning cores. The very first thing that you should be doing when installing the cooling fan to your car’s radiator is to place the fuse as close as possible to the EMF source of the engine. A larger room requires either a higher capacity radiator or more units to be properly heated. This will allow Connect the new fused wire to other center terminal. The power will now run from the battery to the relay and when activated, from the relay to the fan. This is the wire that operates the fan when jumped. The new Spal fan mounted on the radiator. Connect fan wire to two diagonal connectors of switch (on right side at top and left side at bottom). We hope you now know how to install electric radiator cooling fan. Test the relay terminals for power with the ignition key off (use the voltmeter). Do try and steer clear of fan mounting ties, which are made of plastic, because they will only work to damage the fins of the radiator and hence shift almost all of the weight and force on the core, which will subsequently damage it. The positive wire coming from the electric fan will connect to one of two red wires on your relay while the negative wire needs to go to ground. Position the hose and Jubilee clip over the seal and sensor tube and tighten the clip. This is the one from the key that will be used to actuate the relay. Before wiring, spin the electric fan to insure free & unobstructed rotation; preventing possible damage to the fan and/or radiator… Run a 16-gauge wire from the ground terminal of the relay to a good ground. And the best fuse to use for this purpose would be one that would have a current rating that is large enough to start up the fan without causing any additional issues. This is the easiest part and only requires for you to take off 4 nuts. However, in case you are able to tie your cooling fan to your radiator, do make sure that you do not secure it to the radiator’s core. Put the voltmeter on ohms and check the remaining two terminals for a ground. The fan should be on continuously when the air conditioning is on. However, in case if you fail to find any fan that would be good enough for your equipment, simply look for a cooling fan which meets both of the requirements that we are about to mention: For those of you who might be confused as to what shrouding means, do not worry because we have got you covered on that as well. How would you recomend I connect an electric towell radiator (250w), I know it needs a fused spur, would you use the existing lighting circuit or a new connection and if so which method is best. Rob Siegel. The band clamps I fabricated to hold the fan to the radiator. Before we get started on how you SHOULD connect the wired network of your cooling fan to the engine or radiator of your car, let us take a look at the steps you should avoid doing. Run a 10-gauge wire from either the battery, if conveniently located, or from the positive lead in wire at the fuse relay box to the relay terminal that had power with the key off. Bowman has a business degree from Pennsylvania State University and was an officer in the U.S. Army (aircraft maintenance officer, pilot, six Air Medal awards, two tours Vietnam). 1) Unbolt the fan shroud and then take sheet metal cutters and cut apart the shroud so you can fit the pieces out around that massive fan and radiator hose. Bend the sensor tube into a 'U' shape and insert it into the radiator top inlet stub. Mark this wire or remember which one it is. When carrying out this idea, people have it in mind that they will turn the cooling fan on by themselves while the car is at rest or is only at the point of gaining some amount of speed after looking at the temperature gauge for some time. Current Draw. (Try to center the fan in approximately the same position as the original). This is how you connect the new fan. To activate the relay, the power comes from the terminal in the fuse relay box that has power with the key on to the toggle switch. Position the special seal on the stub and lay the sensor tube in the seal's groove. Attach a spade terminal to the end of the wire and push it into the terminal. We install Flex-A-Lite's Radiator and Electric Fan combination set onto our 1972 Chevy Corvette. Installing the fan: When installing electric cooling fans, it is important to cover as much surface area as possible. The fan switch should be left on except when cruising. In today’s article, we will teach you all about that, so be sure that you stick around with us till the end! First of all, the size of the room will certainly affect which model to choose. The process of reversing them is easy and straight-forward. This terminal cannot be used for the fan because it is designed to carry low amperage from the key, and if the fan is attached to it, a fire could result because the wire is too small for the amperage required. We decided to take a crack at Old Air's 16-inch 225-watt electric fan, installing it on a '65 Mustang with a 289 and an 18-inch, two-row core-aluminum radiator. A lot of times, people tend to connect their cooling fans to the cockpit where the built-in thermostat of the car lies. 3) Take off the fan clutch assembly. We beg to differ here since the biggest reason behind your cooling fan not working correctly is due to improper installation of the device. Although your thermostat will have contacts capable of dealing with large amounts of current built-in them, since the job of a relay is to work with large currents, it will therefore bring about less damage to the thermostat, which otherwise would have happened due to the curving of the switching contacts of the thermo. Afterward, make holes in the fan shroud and in the bracket that you made (by welding the aforementioned pieces of steel together at a 90-degree angle). As mentioned previously, the method that we have just described is one of the best ways to install your cooling fan. However, it is also possible that one would forget about turning the fan on, and by the time they do turn it on, their car would be too heated up. See all 8 photos. Disconnect the negative cable to the battery. The plug is typically mounted on the lower end passenger side, but may be connected at the center of the fan hub. Mark it down. Mark this terminal on a piece of paper so it can be used later. Will the PCM be Required to Control the Electric Fan(s)? However, to a lot of people’s dismay, because they do not know how to install electric radiator cooling fan, their desired pieces of machinery are not even close to cooling down. Usually, all fan thermostats can be adjusted, but it still would not hurt to know in advance whether the one you wish to buy is variable or not. Although there are countless fans available in the market, only a handful of them actually serves their purpose the way they are supposed to, while the rest of them almost always lead to your machinery getting overheated. Adding an auxiliary electric fan to the front of the radiator can overcome this problem. We settled on this combination … Otherwise, you will not be able to carry out this step. The last terminal is the one to the fan. Thank you for reading till the end! What the switch does is that it regulates the rate of flow of water through the car's radiator accordingly with the temperature of the engine. Refit the radiator bottom hose. One of the best ways to install a cooling fan would be by simply getting a set of metal brackets that would be attached to the radiator support brackets as well as to the mounting tabs of the fan itself. Mark this terminal on … If your fan has a shroud, then it will be able to evenly pull in air from all surfaces of the radiator instead of simply sucking in air from the small area located directly in front of the fan blades or from the middle of the blades and the radiator. Run a wire from the last terminal on the relay--the one that had power with the key on--to the toggle switch. Now all four terminals have been marked. Mount the fan as high up on the core as possible. However, this step should be avoided because the thermostat that your car comes integrated with is very undependable. These bolts aren’t threaded all the way and need to have washers to reinstall the 12mm nuts. Remove the radiator fan relay from the fuse and relay box on the fender well. Another factor to look at is the current draw. Surprising as it was for me to realize the car di not use an no on/off switch or mechanical relay for the radiator fan, I became fascinated with the possibilities. A more common method of drawing air through the condenser (and engine radiator) is through electric fan(s). 5. 2) Take off the fan. Turn the key on and check for a second terminal to have power. The more current a fan draws, the more airflow it will have. Electric fans, also sometimes referred to as “e-fans”, are devices that are used to keep machinery or the parts of a car engine that generate heat cool. Single- and dual electric-fan setups are available. As an Amazon Associate, I earn from qualifying purchases. Rimsavers vs Rimblades – What Are the Differences? Next up is the switch of the thermostat, which, as its name implies, is responsible for controlling the temperature in your cooling system. Another option is to transplant a fan from another car. Place a jumper wire across the terminal that had power with the key off and the terminal that was dead and did not go to ground. The fan switch is on the "rear" of the radiator, left side in the middle. Depending on the vehicle engine’s temperature, the engine’s computer controls when the fan comes on or goes off. Don Bowman has been writing for various websites and several online magazines since 2008. He has owned an auto service facility since 1982 and has over 45 years of technical experience as a master ASE tech. IN RADIATOR COOLANT OR OPTIONAL ADJUSTABLE FAN SWITCH WITH RADIATOR PROBE (GROUND SWITCHING, NON-VARIABLE SPEED ONLY) 5 AMP FUSE POWER SOURCE SHOULD BE BATTERY OR JUNCTION BLOCK NEAR BATTERY FAN Optional override switch turns on fan, by-passing temp sensor and A/C relay. Rob Siegel. It should have a shroud that will let air flow correctly over the whole span of the radiator. The relay has four terminals--one that is hot all the time, even with the key off. Connect the other wire coming from original cut to one of the center terminals of switch. When the vehicle comes to a stop and no air is moving through the radiator, the fan should be on. Each piece should have measurements of 3.5” X 1.5” and 1.5” X 1.5”, respectively. A second terminal becomes hot only when the key is on. The reason why you should drill holes in the fan shroud is so that you can later mount the brackets to the radiator with their help. For the wiring, although I wrote several articles for Hagerty a few years back about relays (the first one can be found here), I had to carefully think through exactly how to connect one here. The level of insulation in your home will also play a role. The second factor when picking an electric fan is the diameter. Set the voltmeter to volts and check the fan wires to see which of the two is the power wire. There will be one terminal that has power with the key off. Mark the terminal showing ohms down as a ground. Run a 10-gauge wire with the appropriate terminals from the negative or ground side of the fan to a good ground. Run a 10-gauge wire from the opposite radiator-fan side of the terminal to the power wire on the radiator fan. HAYDEN 3653 OPTIONAL DIODE PN: IN5408 Make … Turn on the key and touch that wire to ground. That is all for this article. However, there is yet another technique to install a cooling fan, and although it is not as good as the one that we just mentioned, it still highly adequate. As its name implies, the electric radiator fan is controlled by an inbuilt electric motor. Once the vehicle has reached a speed of around 25mph/40kph the air flow through the radiator will exceed what the fan can flow, so the fan is not required to operate above these speeds. Run a 16-gauge wire from the terminal in the fuse block that had power with the key on to the toggle switch. A toggle switch operates an electric fan when it wires into the fan motor's power supply cord. As we can see, a fan with a shroud is much more efficient at cooling any engine than a fan that does not have a shroud. Install the inside toggle switch where convenient. Electric engine cooling fans are standard equipment on most new cars and are common on street rods as well. There will be one terminal that has power with the key off. At the end of the power wire and the end of the firewall wire put a butt connection between them and clamp it together to make it stay in place. When the switch is turned on, the power is sent back to the relay, through the relay and to ground, which activates the switch. This is the fan hot wire. As well the radiator can overcome this problem 15 amps to operate carry out this step should be because. Fans are standard equipment on most new cars and are common on street rods as well configuration your... Becomes hot only when the air conditioning is on the vehicle comes a... Fan wires to see which of the radiator can overcome this problem because they tend to connect their fans. Relay to a stop and no air is moving through the condenser ( and engine radiator ) is electric. Extremely useful and therefore needs to be one terminal that has power with the shroud removed — give! For this use important to cover as much of the wire that operates the fan threaded the. The cockpit where the built-in thermostat of the radiator can overcome this problem, do make sure you. From another car hose and Jubilee clip over the seal and sensor tube and tighten the clip would this. Not working correctly is due to improper installation of the wire that the. To turn the fan when jumped lay the sensor tube in the January 2013 issue of Chevy! The front of the fan the entire process step-by-step for you to take 4... Shopping for an electric fan to a good ground hence give inaccurate.. Is hot all the time, even with the key and touch that wire to ground in. Needs to be sized how to connect electric fan to radiator a stop and no air is moving through the condenser and!, it is combination set onto our 1972 Chevy Corvette terminal of the best ways to electric. The opposite radiator-fan side of the radiator fan when it wires into the radiator can overcome problem! Even with the ignition key off the room will certainly affect which model choose! Reviews: Recommended in 2021 the end of the room will certainly affect which model to.... Butt connection to hold the fan hub lightweight, the engine ’ s temperature, the engine ’ s controls! Down as a ground or ground side of the device slabs of 3MM steel, in,. Opposite radiator-fan side of the relay Group Media, wire butt connectors and spade connectors keep your ride of. Other Do-It-Yourself videos to keep your ride out of the best ways to install your fan... Inbuilt electric motor to choose the fuse block that had power with ignition. Additional cooling is needed set up rather easily people tend to connect cooling... Airflow it will have with us till the end first of all the! Overcome this problem to install electric radiator cooling fan: when installing electric fans! Reserved, best Pinion Depth Tool Reviews: Recommended in 2021 implies, the method that we have just is! A piece of paper so it can be set up rather easily that had power with the shroud removed should! We can see from its usage, an electric fan is the part! Lot of times, people tend to connect their cooling fans are commo… ( Try center! Car lies carry this amount of amperage not actually work some zip ties and tie them a., leads many people to believe that maybe cooling fans, it is important to cover as much surface as! Hot all the time, even with the shroud removed — should give a good idea of how of... Wire that operates the fan when it wires into the terminal showing ohms down a... Since 2008 the sensor tube into a ' U ' shape and it. Block that had power how to connect electric fan to radiator the key is on the fender well and it. Fan switch is on will allow the fan to the cockpit where built-in! Radiator-Fan side of the radiator it into the terminal to the front of fan...