IMPORTANT NOTES Four Wheel Drives - monitor engine temperatur The wire through the fire wall will now be connected to the switch. How do i wire my radiator fan separate from the ignition? the fan often wants to stay on then i turn the ignition off but when i take the key out the fan stops. Need to do this till I can afford a fix. The clearance between the front of your engine and radiator can be very tight. Nicely done! on Step 2, Question If so do you know if they come in different temperature turn-on specifications? Next, both of the black wires from the relay can be spliced together and ran to your thermostat switch. But yeah I suggest a fan control of some type. 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. I would swap the sensors depending on the season. Above is the picture for our wiring plan! Then use the thermostat for the switch cause they are low volts. on Introduction. 87 (red wire) connects to the positive wire on the electric fan. Now take that blue wire and tap into the red wire (after the fuse) and tape it up! Where Do the Four Wires of an Electric Fan Relay Go (with relay numbers)? Now since it is in place continue to the next step! battery + ==> IGN fusible link ==> ignition switch blue+black wire ==> relay coils. After this is all finished, connect the black (negative) wire back on to your battery. Extend the other end of the jumper wire over to the positive terminal of the battery. This ignition wire will be in your cabin under the dash connected to your key system. 5 years ago goes to the +12 volt of the A/C compressor clutch wire. 5 years ago When the wire touches the positive terminal of the battery, the fan should come on. Then Larger gauge blue w/red and blue/black went to the fan. I hope you'll share more of your work on your car. Mount the fan as high up on the core as possible. So now we have a wire that goes through the engine bay to the cabin of your car! Connect the female blade terminal onto the fan controller marked B+. 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. info@daviescraig.com.au. Fuse tap for wiring electric fans for radiator The relays (each) have 4 connections. This will be the big red wire that is connected to your ignition and sometimes even the red (positive) wire to your battery. Comment; Flag; More. Connect the Red to the red … I have a 10a 6 prong toggle and plenty of wire. He also currently owns and operates Sophisticated Curves, an online fashion mall that caters to the needs of plus size women. Step 1 - Wiring. Tip n. 17. system as an ignition source as it may cause failure of the management system and/or the electrical system. He started writing articles in March 2009, which have appeared on Autos.com and CarsDirect.com. 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! Turn the ignition switch ON (II), then set the A/C button and fan control dial ON. 19. 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 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. Want Answer 1. 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. 2 and body ground. So now take the ground wire and clamp a (round) male connection piece to the wire, then tape it to make sure it stays. Very cool stuff! 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! Get the wire situated and know which wire is ground and which wire is power! Extend the other end of the jumper wire over to the positive terminal of the battery. 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. Dual electric fans could be the solution to your cooling issues. Your engine should now be getting a cool breeze of air with no problems! This terminal needs to be connected to the remaining terminal on the fan controller. Thanks for the suggestion guys! Blue small guage black small guage these wire went to the temp sensor for the bottom radiator. 1 Answer. it comes with 3 wires. Now cut the excess zip tie off for a clean look. 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. 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. how to wire up an electric fan. Electric fans are commo… Next we wired the red fused harness wire to the negative electric fan lead. 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. Now turn on the switch! idk why? That's assuming the radiator itself IS GROUNDED PROPERLY. Locate the positive and negative wires on the cooling fan. Did you make this project? Where do I hook this wire to thr ground? 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. on Introduction. Now take the power wire from your fan and connect it to the wire that is going through the firewall. For a remote battery, it can be connected to a power port in the engine compartment, but it should be fused. Reinstall the radiator fan relay. 16-18 ga: all others. 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. or on at 195°F. The female blade terminal attaches to the red wire on the fan. Get a 30 amp Bosch relay and a toggle switch and 2 fuse holders. Copyright 2020 Leaf Group Ltd. / Leaf Group Media, Aaroncake: How To Properly Install An Electric Fan. The ignition source must be a steady positive supply of 12 or 24V DC. Run a wire from ground to the #86 terminal on the relay. Use the cable ties to hold all your wires in place. 2 years ago. This … Since the wire is now connected we need to do a safety tip! From the switch run a wire to the #85 terminal on the relay. 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. You will then need switched power usually from your ignition switch, wired to the blue wires on the relays. The fan will turn on when the A/C compressor activates. You deserve it! Take the second jumper wire and connect one end of the jumper wire to the positive wire from the fan. 5 years ago. recommended wire sizes: 8-10 ga: fan power and ground. The fan can also be turned off manually when cruising to extend the life of the fan. I needed to take out the conections because they melted.. i forgot to check to see which wires were conected. 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. First to battery positive, second to the fans, third to an ignition switch, and fourth, to a temperature sensor placed in the radiator. and off at 175°F. 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. 30 (other … Unscrew the according link from ON position of the switch, put the wire around it and simply tape it! 21. There are many aftermarket electric fans available, but few have been proven to cool well enough to be used on the rotary. Share it with us! Electric engine cooling fans are used to help remove the excess heat produced by the engine during the combustion process. Depending on the model, the thermostat (sending unit) triggers the fan on at 185°F. Connect the other end of that wire to the engine block or any metal part of the car body. 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 wire through the fire wall will now be connected to the switch. Clicking this will make more experts see the question and we will remind you when it gets answered. Some auxiliary fans are "reversible", which means they can spin in either direction to pull or push air from either side of the radiator. Switches arent designed for high voltage and abuse but the relay is. A toggle switch can be wired into the system to manually override the cycling of the fan. 2 years ago Now lets get the power wire in place. 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". I have a FI tech injection it says hook the fan wire to the ground. I mean I did this project just for my engineering assignment but who knows maybe Ill do more work. well, you can buy a special "Kenlow" or such, thermocouple switch, where a small capillary tube is inserted into the top hose. Take the second jumper wire and connect one end of the jumper wire to the positive wire from the fan. 4 years ago. 20. Now easily tape the wires and butt connection to hold it in place. Lost your password? Cut it. 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. 87 to battery fused 30 amp 87a not used 85 to ground 86 to vehicle side blue/red 30 to fan side blue/red Expose the two wires. This was mainly for simple wiring and for old cars but I totally understand your input thanks again! As above, its so my car can cool off after the ignition is turned off. Having 2 fans required some “marrying up” of the … Posted by SinfulByNature on Apr 01, 2015. This is where it’s important to note that the unit has a maximum draw of 25 continuous amps, and must not exceed that. DNAP420 I like your intelligent suggestions. Disconnect the jumper wire. 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. So today we are working on my old 1964 Buick Skylark. Unscrew the according link from ON position of the switch, put the wire around it and simply tape it! Sometimes these fans will cease to function properly. Print this page; Share this page × Ad. How do I wire the radiator fan to the ignition high circuit fuse? This wiring harness is where you will concentrate your efforts. 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. NO - Repair open in the wire between the radiator fan relay and the ECM/PCM. 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. signal circuit 12v switched (ignition or fuse panel) power “on” when key is in the “run” position. Get the 10 gauge wire and place it through the hole in your fire wall. Reply Because the fan motor pulls a lot of amps, you should wire the switch to a relay and the relay to the fan. Measure the voltage between the radiator fan 2P connector terminal No. This heat would otherwise destroy the engine if allowed to remain. 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