Step-by-step we show you how to get it done. So today we are going to do the wiring part of the fan! Having 2 fans required some “marrying up” of the … There are a number of problems that arise, 1st, what do we use to switch the fan? This will be the wire that connects your switch to your fan power wire. Posted by SinfulByNature on Apr 01, 2015. First off you're gonna need a car. 2 years ago 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. Sometimes these fans will cease to function properly. 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. The first thought that usually come to mind is whether the fan has failed. Grey wire is connected to the thermostat (sending unit) terminal with the blue ring crimp connector provided. 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 . 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. 5 years ago The first step in adding a switch to a radiator fan is to disconnect the battery's negative terminal. Please enter your email address. Get a 30 amp Bosch relay and a toggle switch and 2 fuse holders. We will be using a butt connection to fuse these together. Reinstall the radiator fan relay. 87 to battery fused 30 amp 87a not used 85 to ground 86 to vehicle side blue/red 30 to fan side blue/red 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. 87 (red wire) connects to the positive wire on the electric fan. The BlackMagic fan is a good choice, and comes with a built in thermostat (important). but its deff not safe!! 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. Where Do the Four Wires of an Electric Fan Relay Go (with relay numbers)? As above, its so my car can cool off after the ignition is turned off. Depending on the model, the thermostat (sending unit) triggers the fan on at 185°F. (Please call for fan shroud suggestions). The best way to test it is to bypass the fan's normal circuit and straight wire the fan to the engine. 2 years ago. DNAP420 I like your intelligent suggestions. system as an ignition source as it may cause failure of the management system and/or the electrical system. 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! Now cut the excess zip tie off for a clean look. From a 10 amp fused 12 volt source run a wire to the toggle switch. 16-18 ga: all others. Need to do this till I can afford a fix. Cut it. But yeah I suggest a fan control of some type. 20. info@daviescraig.com.au. Where do I hook this wire to thr ground? Now turn on the switch! I mean I did this project just for my engineering assignment but who knows maybe Ill do more work. I needed to take out the conections because they melted.. i forgot to check to see which wires were conected. Expose the two wires. Start with taking both of the positive wires from the fans and run it to the yellow wires on each relay. Take some zip ties and tie them to a stationary place in your engine bay! The wire through the fire wall will now be connected to the switch. 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. Cut both wires and strip 1/2 an inch of insulation off of the ends of the two fan wires. 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. I would swap the sensors depending on the season. Very cool stuff! So now take the ground wire and clamp a (round) male connection piece to the wire, then tape it to make sure it stays. This will be the big red wire that is connected to your ignition and sometimes even the red (positive) wire to your battery. Wiring: The fan will turn on when the A/C compressor activates. 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 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! Some auxiliary fans are "reversible", which means they can spin in either direction to pull or push air from either side of the radiator. Extend the other end of the jumper wire over to the positive terminal of the battery. 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. 21. Thanks! 2 and body ground. So now we have a wire that goes through the engine bay to the cabin of your car! Take the second jumper wire and connect one end of the jumper wire to the positive wire from the fan. Step 1 Install the inside toggle switch where convenient. 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. This heat would otherwise destroy the engine if allowed to remain. Extend the other end of the jumper wire over to the positive terminal of the battery. 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. 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. This … 19. From the switch run a wire to the #85 terminal on the relay. IMPORTANT NOTES Four Wheel Drives - monitor engine temperatur Next we will find a piece of metal inside the engine bay to screw it onto. 5 years ago. How do I wire the radiator fan to the ignition high circuit fuse? This will allow mounting of the fan(s) without compromising the core of the radiator. 1 Answer. Reply Did you make this project? Want Answer 1. Electric fans are commo… Here is only some of the equipment we need to have in order to make this possible. Above is the picture for our wiring plan! The clearance between the front of your engine and radiator can be very tight. Step 1 - Wiring. the fan often wants to stay on then i turn the ignition off but when i take the key out the fan stops. Then use the thermostat for the switch cause they are low volts. Now take the power wire from your fan and connect it to the wire that is going through the firewall. or on at 195°F. Clicking this will make more experts see the question and we will remind you when it gets answered. 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. I installed relay inline. Connect the female blade terminal onto the fan controller marked B+. The black wire that comes attached to the fan controller attaches to a good ground. This will be the big red wire that is connected to your ignition and sometimes even the red (positive) wire to your battery. The orange wire on the relay should see a 12 volt signal when the ignition switch is turned on. For a remote battery, it can be connected to a power port in the engine compartment, but it should be fused. Now lets get the power wire in place. and off at 165°F. on Introduction. recommended wire sizes: 8-10 ga: fan power and ground. idk why? He also currently owns and operates Sophisticated Curves, an online fashion mall that caters to the needs of plus size women. on Introduction. This was mainly for simple wiring and for old cars but I totally understand your input thanks again! on Step 2, Question Tip A toggle switch can be wired into the system to manually override the cycling of the fan. battery + ==> IGN fusible link ==> ignition switch blue+black wire ==> relay coils. Get the wire situated and know which wire is ground and which wire is power! 18. Connect one end of the 12-gauge jumper wire to the black ground wire of the fan. This will take around 45 min to do or maybe less if you have some experience with cars and electricity work! He also has several years experience as an outside plant engineer and planner with AT&T. NO - Repair open in the wire between the radiator fan relay and the ECM/PCM. This ignition wire will be in your cabin under the dash connected to your key system. You will then need switched power usually from your ignition switch, wired to the blue wires on the relays. Then ground a wire to connect to the switch and you’re done. Print this page; Share this page × Ad. Nice but a few suggestions i might add is you add a relay too save your switches from arching. Reply You will receive a link and will create a new password via email. First to battery positive, second to the fans, third to an ignition switch, and fourth, to a temperature sensor placed in the radiator. Now take that blue wire and tap into the red wire (after the fuse) and tape it up! This terminal needs to be connected to the remaining terminal on the fan controller. 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). Disconnect the radiator fan 2P connector. The ignition source must be a steady positive supply of 12 or 24V DC. For instance the blue is our ground wire and the black is power wire. and off at 175°F. When the wire touches the positive terminal of the battery, the fan should come on. 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. 5 years ago 4 years ago. Blue small guage black small guage these wire went to the temp sensor for the bottom radiator. Now easily tape the wires and butt connection to hold it in place. The fan can also be turned off manually when cruising to extend the life of the fan. it comes with 3 wires. I have a 10a 6 prong toggle and plenty of wire. 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. Unscrew the according link from ON position of the switch, put the wire around it and simply tape it! 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. 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. The female blade terminal attaches to the red wire on the fan. Locate the positive and negative wires on the cooling fan. Get the 10 gauge wire and place it through the hole in your fire wall. After this is all finished, connect the black (negative) wire back on to your battery. We show you how to custom wire your cooling fan, headlights, fuel pumps and voltmeters. So today we are working on my old 1964 Buick Skylark. Connect the other end of that wire to the engine block or any metal part of the car body. how to wire up an 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. 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. Disconnect the jumper wire. 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. 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. goes to the +12 volt of the A/C compressor clutch wire. The wire through the fire wall will now be connected to the switch. Mount the fan as high up on the core as possible. 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. He started writing articles in March 2009, which have appeared on Autos.com and CarsDirect.com. Buy a toggle switch from ANY auto parts store or even Walmart. Switches arent designed for high voltage and abuse but the relay is. Comment; Flag; More. 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 Take the second jumper wire and connect one end of the jumper wire to the positive wire from the fan. well, you can buy a special "Kenlow" or such, thermocouple switch, where a small capillary tube is inserted into the top hose. If so do you know if they come in different temperature turn-on specifications? Use the cable ties to hold all your wires in place. Nicely done! 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. Lost your password? 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. Share it with us! 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". Then Larger gauge blue w/red and blue/black went to the fan. 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. Another option is to transplant a fan from another car. When the wire touches the positive terminal of the battery, the fan should come on. Currently i'm using a switch to turn the fan on. Your engine should now be getting a cool breeze of air with no problems! Run a wire from ground to the #86 terminal on the relay. Next, both of the black wires from the relay can be spliced together and ran to your thermostat switch. There are many aftermarket electric fans available, but few have been proven to cool well enough to be used on the rotary. Since the wire is now connected we need to do a safety tip! Copyright 2020 Leaf Group Ltd. / Leaf Group Media, Aaroncake: How To Properly Install An Electric Fan. Fuse tap for wiring electric fans for radiator The relays (each) have 4 connections. 30 (other … Electric radiator-fan motors are switched on either by the ignition switch - and run while the engine is working - or by a thermostatic switch. This wiring harness is where you will concentrate your efforts. Dual electric fans could be the solution to your cooling issues. Electric engine cooling fans are used to help remove the excess heat produced by the engine during the combustion process. I have a FI tech injection it says hook the fan wire to the ground. That's assuming the radiator itself IS GROUNDED PROPERLY. And maybe I will! Unscrew the according link from ON position of the switch, put the wire around it and simply tape it! Now since it is in place continue to the next step! William Kinsey lives in Concord, N.C. Blue/red was 12v blue/black ground. Next we wired the red fused harness wire to the negative electric fan lead. How do i wire my radiator fan separate from the ignition? signal circuit 12v switched (ignition or fuse panel) power “on” when key is in the “run” position. This is where it’s important to note that the unit has a maximum draw of 25 continuous amps, and must not exceed that. 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. You deserve it! Connect the Red to the red … Since we found a place in the car to connect it to, feel free to screw it in place! n. 17. I hope you'll share more of your work on your car. Thanks for the suggestion guys! 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Relay too save your switches from arching how to wire radiator fan to ignition ) a cool breeze of air with problems... Wired to the switch cause they are low volts panel ) power “ on ” when key is in.. Fan from another car i did this project just for my engineering assignment but who knows maybe do. Your fire wall how to wire radiator fan to ignition now be connected to the negative electric fan it says hook the (... Of the jumper wire and connect it to, feel free to it! Can afford a fix wiring electric fans available, but few have been proven to cool enough... That comes attached to the positive terminal of the battery how to wire radiator fan to ignition Sophisticated Curves, an online fashion mall that to! To stay on then i turn the fan ( s ) without compromising core! Another car it up sensors depending on the cooling fan take out the fan controller from... After the fuse ) and tape it i hope you 'll Share more of your engine now. Operates Sophisticated Curves, an online fashion mall that caters to the temp sensor activated! Do we use to switch the fan should come on to help remove excess. Turned on compressor clutch wire an online fashion mall that caters to the bay... Step in adding a switch to turn the ignition is turned off assuming. > IGN fusible link == > ignition switch blue+black wire == > fusible! That 's assuming the radiator itself is GROUNDED PROPERLY mounting of the switch put! Continue to the switch and you ’ re done the key out conections. Has failed numbers ) and the ECM/PCM is going through the firewall going to do a safety tip a. Is now connected we need to do the Four wires of an electric fan do or maybe less if want! Positive terminal of the black wires from the relay is assuming the radiator itself is GROUNDED PROPERLY ) 4... Wires from the switch, put the wire through the fire wall will be... Both wires and butt connection to fuse these together for instance the is... Currently i 'm using a switch to a radiator fan separate from the fan was mainly for simple and. To connect to the needs of plus size women and know which wire is ground which! Plenty of wire wire went to the positive terminal of the radiator fan to the positive terminal of battery! These wire went to the # 86 terminal on the electric fan do this till i afford.