Now turn on the switch! Some auxiliary fans are "reversible", which means they can spin in either direction to pull or push air from either side of the radiator. He also has several years experience as an outside plant engineer and planner with AT&T. Connect the Red to the red … Nice but a few suggestions i might add is you add a relay too save your switches from arching. Get the wire situated and know which wire is ground and which wire is power! Unscrew the according link from ON position of the switch, put the wire around it and simply tape it! 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. Did you make this project? This will take around 45 min to do or maybe less if you have some experience with cars and electricity work! 85 87 87A 30 86 To Gray wire of FRH To air conditioning positive (+) wire (12 Volts activated ON”) 85 86 To Ground 30 High Current Applications: See multiple fan wiring diagram on reverse page. and off at 175°F. But yeah I suggest a fan control of some type. A temp switch that threads into the block/intake and relay can be had for around 10 if you want to make the harness yourself. So today we are going to do the wiring part of the fan! The black wire that comes attached to the fan controller attaches to a good ground. First to battery positive, second to the fans, third to an ignition switch, and fourth, to a temperature sensor placed in the radiator. Then ground a wire to connect to the switch and you’re done. 5 years ago When the wire touches the positive terminal of the battery, the fan should come on. (Please call for fan shroud suggestions). signal circuit 12v switched (ignition or fuse panel) power “on” when key is in the “run” position. Reinstall the radiator fan relay. Thanks for the suggestion guys! And maybe I will! Next we will find a piece of metal inside the engine bay to screw it onto. Copyright 2020 Leaf Group Ltd. / Leaf Group Media, Aaroncake: How To Properly Install An Electric Fan. After this is all finished, connect the black (negative) wire back on to your battery. Since we found a place in the car to connect it to, feel free to screw it in place! Reply I mean I did this project just for my engineering assignment but who knows maybe Ill do more work. How do i wire my radiator fan separate from the ignition? This will be the big red wire that is connected to your ignition and sometimes even the red (positive) wire to your battery. Sometimes these fans will cease to function properly. First off you're gonna need a car. 21. So today we are working on my old 1964 Buick Skylark. This heat would otherwise destroy the engine if allowed to remain. If so do you know if they come in different temperature turn-on specifications? Start with taking both of the positive wires from the fans and run it to the yellow wires on each relay. Thermostatically controlled motors do not work the fan until the engine coolant rises above normal operating temperature, and then switch off when it has cooled down again. Thanks! on Step 2, Question Wiring: Depending on the model, the thermostat (sending unit) triggers the fan on at 185°F. The best way to test it is to bypass the fan's normal circuit and straight wire the fan to the engine. 30 (other … This is where it’s important to note that the unit has a maximum draw of 25 continuous amps, and must not exceed that. How do I wire the radiator fan to the ignition high circuit fuse? So now take the ground wire and clamp a (round) male connection piece to the wire, then tape it to make sure it stays. i need to know how to wire a toggle switch for my fan because it doesn't work and every time i try to wire it or have someone wire it for me it catches on fire. There are a number of problems that arise, 1st, what do we use to switch the fan? Lost your password? This wiring harness is where you will concentrate your efforts. Run a wire from ground to the #86 terminal on the relay. I have a FI tech injection it says hook the fan wire to the ground. Take the second jumper wire and connect one end of the jumper wire to the positive wire from the fan. the fan often wants to stay on then i turn the ignition off but when i take the key out the fan stops. Fuse tap for wiring electric fans for radiator The relays (each) have 4 connections. Now take that blue wire and tap into the red wire (after the fuse) and tape it up! IMPORTANT NOTES Four Wheel Drives - monitor engine temperatur Now cut the excess zip tie off for a clean look. Nicely done! Conversely, if your vehicle has a belt-driven fan located behind the radiator, you'll need a "pusher" auxiliary fan that pushes air from in front of the radiator. The first thought that usually come to mind is whether the fan has failed. battery + ==> IGN fusible link ==> ignition switch blue+black wire ==> relay coils. The first step in adding a switch to a radiator fan is to disconnect the battery's negative terminal. The BlackMagic fan is a good choice, and comes with a built in thermostat (important). Electric fans are commo… Then Larger gauge blue w/red and blue/black went to the fan. Then use the thermostat for the switch cause they are low volts. The other two wires on the relay are the meat and potatoes of the system, with the yellow wire connecting to the battery along with the supplied fuse mounted within 12 inches of the battery. There are many aftermarket electric fans available, but few have been proven to cool well enough to be used on the rotary. So we have bought a Ford Taurus 2-speed fan, this fan had rumored to cool down the biggest and some of the toughest blocks around! Please enter your email address. 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 winter. or on at 195°F. Buy a toggle switch from ANY auto parts store or even Walmart. Blue/red was 12v blue/black ground. Need to do this till I can afford a fix. firstname.lastname@example.org. DNAP420 I like your intelligent suggestions. If in doubt about any aspect of these instructions consult your retailer or Davies, Craig P/L direct on: (03) 9369-1234 or e-mail . but its deff not safe!! Comment; Flag; More. He started writing articles in March 2009, which have appeared on Autos.com and CarsDirect.com. I hope you'll share more of your work on your car. The female blade terminal attaches to the red wire on the fan. Very cool stuff! I have a 10a 6 prong toggle and plenty of wire. For a remote battery, it can be connected to a power port in the engine compartment, but it should be fused. He currently holds a Bachelor of Science in electrical engineering from the University of North Carolina at Charlotte and a Master of Business Administration from the University of Phoenix. The wire through the fire wall will now be connected to the switch. For instance the blue is our ground wire and the black is power wire. Now since it is in place continue to the next step! A lot of people are now fitting electric fans to their kit cars, often because they have had to relocate the radiator away from the normal viscous fan. One main safety step is to unhook the BLACK (negative) wire from the battery, and when you do so make sure it will not touch the RED (positive) wire or any metal around it! Step 1 Install the inside toggle switch where convenient. From the switch run a wire to the #85 terminal on the relay. Now lets get the power wire in place. Take some zip ties and tie them to a stationary place in your engine bay! We found the easiest way to wire the new setup was to wire the power wire (fan lead, red loose wire) to the positive lead on the battery. This will allow mounting of the fan(s) without compromising the core of the radiator. The fan will turn on when the A/C compressor activates. 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". Cut both wires and strip 1/2 an inch of insulation off of the ends of the two fan wires. Get the 10 gauge wire and place it through the hole in your fire wall. William Kinsey lives in Concord, N.C. 18. We show you how to custom wire your cooling fan, headlights, fuel pumps and voltmeters. 5- 1 pack of quick disconnects (male) -10 gauge-, 8- Pair of needle nose pliers or some clamps, Any of these parts can be purchased from an O'Reillys or Hardware Store. on Step 2, One easy thing is to take a rag or piece of cardboard and wrap it around the negative cable end peace, 2 years ago I would swap the sensors depending on the season. Your engine should now be getting a cool breeze of air with no problems! Extend the other end of the jumper wire over to the positive terminal of the battery. 2 and body ground. Electric engine cooling fans are used to help remove the excess heat produced by the engine during the combustion process. Since the wire is now connected we need to do a safety tip! The wire you will need to cut will be in this wiring harness and in most autos will be red in color and a heavy gauge. This will be the wire that connects your switch to your fan power wire. 5 years ago. This ignition wire will be in your cabin under the dash connected to your key system. Then make sure the the blue wire on the Power link (middle link of switch) is connected to the main ignition wire of the car. 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. instead of a switch you can get a fan controler from the autoparts store for 20 to 30 and it will turn the fan on and off as needed like a factory fan would work, Reply Where do I hook this wire to thr ground? Locate the positive and negative wires on the cooling fan. Next, both of the black wires from the relay can be spliced together and ran to your thermostat switch. So now we have a wire that goes through the engine bay to the cabin of your car! The wire through the fire wall will now be connected to the switch. 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). on Introduction. 5 years ago Now easily tape the wires and butt connection to hold it in place. n. 17. recommended wire sizes: 8-10 ga: fan power and ground. The clearance between the front of your engine and radiator can be very tight. Cut it. 2 years ago. Connect the other end of that wire to the engine block or any metal part of the car body. This … Next we wired the red fused harness wire to the negative electric fan lead. Another option is to transplant a fan from another car. The orange wire on the relay should see a 12 volt signal when the ignition switch is turned on. A toggle switch can be wired into the system to manually override the cycling of the fan. You will then need switched power usually from your ignition switch, wired to the blue wires on the relays. Currently i'm using a switch to turn the fan on. I installed relay inline. 87 (red wire) connects to the positive wire on the electric fan. Because the fan motor pulls a lot of amps, you should wire the switch to a relay and the relay to the fan. Clicking this will make more experts see the question and we will remind you when it gets answered. 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. 16-18 ga: all others. Share it with us! The fan can also be turned off manually when cruising to extend the life of the fan. Electric radiator-fan motors are switched on either by the ignition switch - and run while the engine is working - or by a thermostatic switch. goes to the +12 volt of the A/C compressor clutch wire. on Introduction. When the wire touches the positive terminal of the battery, the fan should come on. Connect one end of the 12-gauge jumper wire to the black ground wire of the fan. As above, its so my car can cool off after the ignition is turned off. Expose the two wires. I needed to take out the conections because they melted.. i forgot to check to see which wires were conected. Above is the picture for our wiring plan! Get a 30 amp Bosch relay and a toggle switch and 2 fuse holders. Grey wire is connected to the thermostat (sending unit) terminal with the blue ring crimp connector provided. Tip system as an ignition source as it may cause failure of the management system and/or the electrical system. i have it running from the fan to the batter and from there it runs up the side of my car and in through the door not like on the outside but along the hood under in and through the door. Since you are now done, go drive around and make sure your temperature stay below 210 degrees F. Go grab a drink or a bite to eat after this job. You will receive a link and will create a new password via email. Switches arent designed for high voltage and abuse but the relay is. He also currently owns and operates Sophisticated Curves, an online fashion mall that caters to the needs of plus size women. 87 to battery fused 30 amp 87a not used 85 to ground 86 to vehicle side blue/red 30 to fan side blue/red Disconnect the radiator fan 2P connector. Want Answer 1. This will be the big red wire that is connected to your ignition and sometimes even the red (positive) wire to your battery. idk why? From a 10 amp fused 12 volt source run a wire to the toggle switch. it comes with 3 wires. This terminal needs to be connected to the remaining terminal on the fan controller. That's assuming the radiator itself IS GROUNDED PROPERLY. The ignition source must be a steady positive supply of 12 or 24V DC. Step-by-step we show you how to get it done. 19. Use the cable ties to hold all your wires in place. Mount the fan as high up on the core as possible. Reply how to wire up an electric fan. 20. Other side of the relay coils go to the temperature sensors screwed into the bottom of the radiator; when a temp sensor closes (high water temp in radiator) it completes the circuit to ground, tripping the relay. Turn the ignition switch ON (II), then set the A/C button and fan control dial ON. NO - Repair open in the wire between the radiator fan relay and the ECM/PCM. The Chevelle has 6 inches of clearance between the radiator and the water pump and 41/2 inches to the upper radiator hose; any fan up to 41/2 inches in depth will fit. 4 years ago. 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. 1 Answer. Then make sure the the blue wire on the Power link (middle link of switch) is connected to the main ignition wire of the car. and off at 165°F. We will be using a butt connection to fuse these together. Step 1 - Wiring. Having 2 fans required some “marrying up” of the … This was mainly for simple wiring and for old cars but I totally understand your input thanks again! You deserve it! Extend the other end of the jumper wire over to the positive terminal of the battery. Where Do the Four Wires of an Electric Fan Relay Go (with relay numbers)? Unscrew the according link from ON position of the switch, put the wire around it and simply tape it! Dual electric fans could be the solution to your cooling issues. Blue small guage black small guage these wire went to the temp sensor for the bottom radiator. Disconnect the jumper wire. well, you can buy a special "Kenlow" or such, thermocouple switch, where a small capillary tube is inserted into the top hose. You can get the current for the thermostat at a switched 12v that way it only works when the car is on, and the proper temperature. Print this page; Share this page × Ad. Connect the female blade terminal onto the fan controller marked B+. Here is only some of the equipment we need to have in order to make this possible. Measure the voltage between the radiator fan 2P connector terminal No. Now take the power wire from your fan and connect it to the wire that is going through the firewall. Tap into this wire with a yellow 3M wire tap and run a wire from this tap to the terminal for the light on the switch. 2 years ago Posted by SinfulByNature on Apr 01, 2015. 1st relay turns on fan when temp sensor is activated battery 86 30 87 85 12v switched wire to green wire at a/c clutch. Take the second jumper wire and connect one end of the jumper wire to the positive wire from the fan. Some of the jumper wire and connect one end of the switch, put the wire around it simply. We show you how to get it done the negative electric fan lead have been to. 45 min to do the Four wires of an electric fan the second jumper to... Order to make the harness yourself ignition source must be a steady supply... 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