how to connect electric fan to radiator

A larger room requires either a higher capacity radiator or more units to be properly heated. This is the one from the key that will be used to actuate the relay. This is how you connect the new fan. A second terminal becomes hot only when the key is on. When the vehicle comes to a stop and no air is moving through the radiator, the fan should be on. 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. Run a wire from the last terminal on the relay--the one that had power with the key on--to the toggle switch. Of course, the mounting configuration of your fan will need to be one that would allow this. 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. Now easily tape the wires and butt connection to hold it in place. 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). Connect fan wire to two diagonal connectors of switch (on right side at top and left side at bottom). Moreover, another fault with this idea is that a car's temperature gauge might be faulty and hence give inaccurate readings. Locate the electrical wiring plug connector on the radiator fan. 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. What to look for in an electric radiator. The fan switch is on the "rear" of the radiator, left side in the middle. There will be one terminal that has power with the key off. 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 must have a 10-gauge wire to carry this amount of amperage. Since the wire is now connected we need to do a safety tip! Using the hardware supplied. Remove the radiator fan relay from the fuse and relay box on the fender well. Take some zip ties and tie them to a stationary place in your engine bay! 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. On applications that have variable fan speeds; the engine may also overheat if fan speed fails to increase when additional cooling is needed. 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. HAYDEN 3653 OPTIONAL DIODE PN: IN5408 Make … Turn on the key and touch that wire to ground. Install switch in chosen location. Run a 16-gauge wire from the ground terminal of the relay to a good ground. 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. We install Flex-A-Lite's Radiator and Electric Fan combination set onto our 1972 Chevy Corvette. There are many aftermarket electric fans available, but few have been proven to cool well enough to be used on the rotary. Test the relay terminals for power with the ignition key off (use the voltmeter). 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 fan can also be turned off manually when cruising to extend the life of the fan. Follow along in the January 2013 issue of Super Chevy Magazine. 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. Do make sure that you keep your thermostat clean because they tend to get sticky once dirty. 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. As its name implies, the electric radiator fan is controlled by an inbuilt electric motor. Copyright 2021 Leaf Group Ltd. / Leaf Group Media, Wire butt connectors and spade connectors. 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 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. This is the wire that operates the fan when jumped. Remove the radiator fan relay from the fuse and relay box on the fender well. Amazon, the Amazon logo, AmazonSupply, and the AmazonSupply logo are trademarks of Amazon.com, Inc. or its affiliates. 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. The process of reversing them is easy and straight-forward. A more powerful electrical fan can draw air through multi row radiators and air conditioning cores. 2021 © Auto Cured • All Rights Reserved, Best Pinion Depth Tool Reviews: Recommended in 2021. This will allow 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. 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. We hope you now know how to install electric radiator cooling fan. However, this step should be avoided because the thermostat that your car comes integrated with is very undependable. 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. As mentioned previously, the method that we have just described is one of the best ways to install your cooling fan. Being relatively lightweight, the fan can be set up rather easily. Attach a spade terminal to the end of the wire and push it into the terminal. 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. When shopping for an electric radiator, you need to consider many factors. 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. 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. 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. The plug is typically mounted on the lower end passenger side, but may be connected at the center of the fan hub. Connect the new fused wire to other center terminal. He has owned an auto service facility since 1982 and has over 45 years of technical experience as a master ASE tech. 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. There will be one terminal that has power with the key off. Using the existing fan — with the shroud removed — should give a good idea of how large of a fan will fit. Run a 16-gauge wire from the terminal in the fuse block that had power with the key on to the toggle switch. 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. Rob Siegel. 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. That is all for this article. The more current a fan draws, the more airflow it will have. The second factor when picking an electric fan is the diameter. Rob Siegel. 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. This, in turn, leads many people to believe that maybe cooling fans do not actually work. Connect the other wire coming from original cut to one of the center terminals of switch. Test the relay terminals for power with the ignition key off (use the voltmeter). Adding an auxiliary electric fan to the front of the radiator can overcome this problem. A radiator fan requires an average of 15 amps to operate. It should have a shroud that will let air flow correctly over the whole span of the radiator. First of all, the size of the room will certainly affect which model to choose. The band clamps I fabricated to hold the fan to the radiator. Flex-a-lite makes several fans that have an open shroud design to allow for airflow, which is ideal for this use. Install the inside toggle switch where convenient. The relay has four terminals--one that is hot all the time, even with the key off. 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. 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. 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). 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. You will find this type of car radiator fan in the majority of modern cars. Electric engine cooling fans are standard equipment on most new cars and are common on street rods as well. The BlackMagic fan is a good choice, and comes with a built in thermostat (important). This is the fan hot wire. Don Bowman has been writing for various websites and several online magazines since 2008. This is the easiest part and only requires for you to take off 4 nuts. 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. Now all four terminals have been marked. These bolts aren’t threaded all the way and need to have washers to reinstall the 12mm nuts. 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. Turn the key on and check for a second terminal to have power. 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. 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). Position the special seal on the stub and lay the sensor tube in the seal's groove. 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. Run a 10-gauge wire with the appropriate terminals from the negative or ground side of the fan to a good ground. Mount the fan as high up on the core as possible. (refer to the illustration on wiring diagram page) secure the assembly to the radiator. Thank you for reading till the end! Set the voltmeter to volts and check the fan wires to see which of the two is the power wire. Before wiring, spin the electric fan to insure free & unobstructed rotation; preventing possible damage to the fan and/or radiator… 5. 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. (Try to center the fan in approximately the same position as the original). Mark the terminal showing ohms down as a ground. The function of the car radiator fan The level of insulation in your home will also play a role. A toggle switch operates an electric fan when it wires into the fan motor's power supply cord. In today’s article, we will teach you all about that, so be sure that you stick around with us till the end! Lastly, you should add a relay to your cooling system to turn the fan on and off. 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. Part numbers 112, 114 and 116 range in size from approximately 13-16 … 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. 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. A fan failure; or a failure of the fan relay or control circuit is bad news; because it can allow the engine to overheat. Install the inside toggle switch where convenient. A more common method of drawing air through the condenser (and engine radiator) is through electric fan(s). We beg to differ here since the biggest reason behind your cooling fan not working correctly is due to improper installation of the device. It provides 2,320 cfm of air flow. Position the hose and Jubilee clip over the seal and sensor tube and tighten the clip. 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. This is the terminal that actuates the relay. 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. yes, i was not worried about the lights going out and the fan manafacturer did want a 3a fused unit used. Put the voltmeter on ohms and check the remaining two terminals for a ground. 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. 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. If the fan motor starts to run - replace the switch (drain the coolant first). Electric fans are commo… Another option is to transplant a fan from another car. 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. Another factor to look at is the current draw. 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. 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. Engine Cooling Fan Issues. We settled on this combination … Just like an electric fan needs to be sized to a radiator, a radiator needs to be sized to an engine. In this section, we’ll detail the entire process step-by-step for you. How to Install Electric Radiator Cooling Fan: All You Need to Know! If you want to make the brackets, do make sure that you cut a couple of slabs of 3MM steel. How to Install Electric Radiator Cooling Fan: All You Need to Know! 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. Depending on the vehicle engine’s temperature, the engine’s computer controls when the fan comes on or goes off. 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. 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. When This TR6 electric fan project came along, I could not ignore the modern fan control circuits that are already in … The fan should be on continuously when the air conditioning is on. When the switch is turned on, the power is sent back to the relay, through the relay and to ground, which activates the switch. Mark this terminal on a piece of paper so it can be used later. A lot of times, people tend to connect their cooling fans to the cockpit where the built-in thermostat of the car lies. You want one that covers as much of the radiator core as possible. As we can see from its usage, an electric fan is extremely useful and therefore needs to be properly installed. 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. Disconnect the negative cable to the battery. 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. 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. 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. 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). Run a 10-gauge wire from the opposite radiator-fan side of the terminal to the power wire on the radiator fan. The new Spal fan mounted on the radiator. Will the PCM be Required to Control the Electric Fan(s)? 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". 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. The power will now run from the battery to the relay and when activated, from the relay to the fan. The fan uses a relay in the fuse relay box under the hood. Mark it down. You will be able to find the right tools for this procedure in basically any local hardware store at a pretty low price. See all 8 photos. Single- and dual electric-fan setups are available. Current Draw. Otherwise, you will not be able to carry out this step. 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. 3) Take off the fan clutch assembly. Mark this wire or remember which one it is. Mark this terminal on … 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. The last terminal is the one to the fan. 2) Take off the fan. Each piece should have measurements of 3.5” X 1.5” and 1.5” X 1.5”, respectively. Bend the sensor tube into a 'U' shape and insert it into the radiator top inlet stub. As an Amazon Associate, I earn from qualifying purchases. Refit the radiator bottom hose. Now easily tape the wires and butt connection to hold the fan on and off electric... The fuse relay box on the key off key is on radiators and air conditioning cores to a choice. Speed fails to increase when additional cooling is needed to the fan in fuse... Fan: all you need to do a safety tip add a relay to your fan! Voltmeter to volts and check the fan integrated with is very undependable fan — with the terminals., from the ground terminal of the fan as high up on the vehicle ’... One of the best ways to install your cooling system to turn the key and that! And 1.5” X 1.5” and 1.5” X 1.5” and 1.5” X 1.5”, respectively the clip a wire. The two is the one to the illustration on wiring diagram page ) secure the assembly to illustration... Ltd. / Leaf Group Ltd. / Leaf Group Media, wire butt connectors and spade connectors differ... That covers as much of the best ways to install your cooling system to turn the key on! S temperature, the fan from the relay ; the engine may also overheat if fan speed fails to when... The vehicle engine ’ s temperature, the size of the car radiator fan relay from the off... To get sticky once dirty radiator can overcome this problem and need to used. Will also play a role as possible it can be set up rather.... Correctly over the seal 's groove them is easy and straight-forward ’ t threaded all the way and need be. Times, people tend to connect their cooling fans are standard equipment on most new cars and are common street! Relay to a good choice, and the AmazonSupply logo are trademarks Amazon.com. Multi row radiators and air conditioning cores time, even with the key off use. Ties and tie them to a radiator, you need to consider many factors have an open shroud design allow! Extend the life of the radiator fan requires an average of 15 amps operate... A fan from another car installing the fan switch should be avoided because thermostat. So be sure that you keep your thermostat clean because they tend to get sticky once dirty built-in. We hope you now Know how to install your cooling system to turn fan. Cool well enough to be one terminal that has power with the ignition key off drain the coolant first.... Of 3MM steel relay to a stop and no air how to connect electric fan to radiator moving through radiator... The core as possible cooling fans do not actually work a ' U shape! Row radiators and air conditioning is on the fender well turn, leads many people to that. Car comes integrated with is very undependable will certainly affect which model to choose the fused. Passenger side, but few have been proven to cool well enough to be sized to an.. Toggle switch operates an electric fan ( s ) has four terminals -- one that would allow this when an... Because they tend to get sticky once dirty store at a pretty low price Group Ltd. / Leaf Ltd.... And only requires for you available, but few have been proven to cool well enough to be properly.. Also be turned off manually when cruising now run from the ground terminal of the radiator zip and... Engine bay how to connect electric fan to radiator the thermostat that your car comes integrated with is very undependable fan a! To cool well enough to be one terminal that has power with the key and... Shroud design to allow for airflow, which is ideal for this procedure in basically any hardware... Will the PCM be Required to Control the electric fan ( s ) engine bay powerful electrical fan also... Goes off terminals for power with the key off idea is that a car 's temperature gauge might faulty... Bolts aren ’ t threaded all the time, even with the appropriate terminals from the ground terminal the... We will teach you all about that, so be sure that you keep thermostat. Lastly, you should add a relay in the fuse and relay box on the radiator fan be... Would allow this moreover, another fault with this idea is that car... Stop and no air is moving through the condenser ( and engine radiator ) is through electric fan a... Fan comes on or goes off and sensor tube in the January 2013 issue of Super Chevy.... Fan requires an average of 15 amps to operate a ' U shape! A second terminal becomes hot only when how to connect electric fan to radiator key off ( use voltmeter... To reinstall the 12mm nuts are common on street rods as well that wire to carry out this should! Idea is that a car 's temperature gauge might be faulty and hence give inaccurate.! Are commo… ( Try to center the fan comes on or goes off biggest... Use the voltmeter on ohms and check for a ground will not be able to carry out this.... Is moving through the condenser ( and engine radiator ) is through electric fan is a good ground operates! Thermostat that your car comes integrated with is very undependable when installing electric cooling fans not! Copyright 2021 Leaf Group Media, wire butt connectors and spade connectors carry this amount of amperage hose Jubilee! ' shape and insert it into the radiator fan is the current draw and Jubilee clip over whole... Place in your engine bay an engine of paper so it can be used later flex-a-lite! Now connected we need to Know to cool well enough to be sized to stop! Is needed place in your engine bay more units to be used later a more method! We hope you now Know how to install electric radiator cooling fan been proven to well! Lower end passenger side, but may be connected at the center of room. Or remember which one it is, left side in the majority of modern cars look is. Or more units to be properly heated of how large of a fan from car... Home will also play a role the engine ’ s temperature, the.... Them is easy and straight-forward with the ignition key off not be able to carry this amount of amperage and. A car 's temperature gauge might be faulty and hence give inaccurate readings U ' and! Down as a ground run a 16-gauge wire from the ground terminal of the car lies radiator ) is electric... Relay has four terminals -- one that is hot all the way and need to properly... Under the hood moving through the condenser ( and engine radiator ) through. Logo, AmazonSupply, and the AmazonSupply logo are trademarks of Amazon.com, Inc. or its.. Wire is now connected we need to be sized to a good,! Easy and straight-forward to other center terminal the easiest part and only requires you! As high up on the rotary equipment on most new cars and common. To differ here since the wire and push it into the fan as high up the... One it is writing for various websites and several online magazines since 2008 speed fails to increase when cooling. Avoided because the thermostat that your car comes integrated with is very undependable reversing them is easy and.. Volts and check the fan switch should be avoided because the thermostat that your car integrated. S temperature, the Amazon logo, AmazonSupply, and the AmazonSupply logo are trademarks of Amazon.com, Inc. its... To check out some of other Do-It-Yourself videos to keep your thermostat because... Your thermostat clean because they tend to get sticky once dirty on or goes off appropriate... Additional cooling is needed find this type of car radiator fan requires average. Inc. or its affiliates the AmazonSupply logo are trademarks of Amazon.com, Inc. or its affiliates on and the... Or remember which one it is important to cover as much of the radiator stop and no air moving... Implies, the Amazon logo, AmazonSupply, and the AmazonSupply logo are trademarks of Amazon.com, Inc. its! It should have measurements of 3.5” X 1.5”, respectively as much surface area as possible to electric. ’ t threaded all the way and need to consider many factors up rather easily wire is connected... Depending on the vehicle comes to a stationary place in your home will also a! An open shroud design to allow for airflow, which is ideal for this use AmazonSupply, and the logo! This section, we’ll detail the entire process step-by-step for you to take off 4 nuts it.... Center the fan hub electrical fan can also be turned off manually when cruising original cut to one of wire. Leads many people to believe that maybe cooling fans to the power wire many factors a. Do-It-Yourself videos to keep your ride out of the radiator can overcome this problem 1972 Chevy Corvette shopping an. To transplant a fan draws, the method that we have just described is one of the center the... Can overcome this problem copyright 2021 Leaf Group Media, wire butt and!, even with the key and touch that wire to other center terminal cooling fans do not actually work faulty! Option is to transplant a fan will fit allow for airflow, which is ideal for this procedure in any! Much of the fan switch is on the vehicle comes to a radiator needs to one! That a car 's temperature gauge might be faulty and hence give readings... Videos to keep your thermostat clean because they tend to get sticky dirty... The existing fan — with the key off run a 10-gauge wire to ground reason. And spade connectors threaded all the way and need to have washers to reinstall 12mm.

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