and off at 165°F. Clicking this will make more experts see the question and we will remind you when it gets answered. 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. Buy a toggle switch from ANY auto parts store or even Walmart. Expose the two wires. info@daviescraig.com.au. Some auxiliary fans are "reversible", which means they can spin in either direction to pull or push air from either side of the radiator. Your engine should now be getting a cool breeze of air with no problems! 16-18 ga: all others. 5 years ago. First to battery positive, second to the fans, third to an ignition switch, and fourth, to a temperature sensor placed in the radiator. Lost your password? Grey wire is connected to the thermostat (sending unit) terminal with the blue ring crimp connector provided. This will be the big red wire that is connected to your ignition and sometimes even the red (positive) wire to your battery. Cut it. The orange wire on the relay should see a 12 volt signal when the ignition switch is turned on. Very cool stuff! 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. 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. The wire through the fire wall will now be connected to the switch. Thanks for the suggestion guys! 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. This wiring harness is where you will concentrate your efforts. Connect one end of the 12-gauge jumper wire to the black ground wire of the fan. This ignition wire will be in your cabin under the dash connected to your key system. That's assuming the radiator itself IS GROUNDED PROPERLY. Disconnect the radiator fan 2P connector. Fuse tap for wiring electric fans for radiator The relays (each) have 4 connections. Measure the voltage between the radiator fan 2P connector terminal No. Connect the female blade terminal onto the fan controller marked B+. And maybe I will! NO - Repair open in the wire between the radiator fan relay and the ECM/PCM. Print this page; Share this page × Ad. 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 hope you'll share more of your work on your car. Currently i'm using a switch to turn the fan on. So now take the ground wire and clamp a (round) male connection piece to the wire, then tape it to make sure it stays. Nice but a few suggestions i might add is you add a relay too save your switches from arching. Electric radiator-fan motors are switched on either by the ignition switch - and run while the engine is working - or by a thermostatic switch. Tip The first thought that usually come to mind is whether the fan has failed. When the wire touches the positive terminal of the battery, the fan should come on. Now lets get the power wire in place. Thanks! (Please call for fan shroud suggestions). For a remote battery, it can be connected to a power port in the engine compartment, but it should be fused. 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. the fan often wants to stay on then i turn the ignition off but when i take the key out the fan stops. Now turn on the switch! Now since it is in place continue to the next step! Where do I hook this wire to thr ground? If so do you know if they come in different temperature turn-on specifications? Step 1 - Wiring. Because the fan motor pulls a lot of amps, you should wire the switch to a relay and the relay to the fan. Need to do this till I can afford a fix. Disconnect the jumper wire. I would swap the sensors depending on the season. 21. Step-by-step we show you how to get it done. 1 Answer. The ignition source must be a steady positive supply of 12 or 24V DC. The BlackMagic fan is a good choice, and comes with a built in thermostat (important). From the switch run a wire to the #85 terminal on the relay. Another option is to transplant a fan from another car. Turn the ignition switch ON (II), then set the A/C button and fan control dial ON. 2 and body ground. 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 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. 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". Posted by SinfulByNature on Apr 01, 2015. Run a wire from ground to the #86 terminal on the relay. Take the second jumper wire and connect one end of the jumper wire to the positive wire from the fan. DNAP420 I like your intelligent suggestions. 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. 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! I mean I did this project just for my engineering assignment but who knows maybe Ill do more work. The fan will turn on when the A/C compressor activates. Now take that blue wire and tap into the red wire (after the fuse) and tape it up! Take some zip ties and tie them to a stationary place in your engine bay! Get a 30 amp Bosch relay and a toggle switch and 2 fuse holders. You will then need switched power usually from your ignition switch, wired to the blue wires on the relays. 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. Nicely done! Connect the Red to the red … well, you can buy a special "Kenlow" or such, thermocouple switch, where a small capillary tube is inserted into the top hose. Next we wired the red fused harness wire to the negative electric fan lead. But yeah I suggest a fan control of some type. 2 years ago. There are a number of problems that arise, 1st, what do we use to switch the fan? 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. 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. 20. idk why? 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). This will allow mounting of the fan(s) without compromising the core of the radiator. So now we have a wire that goes through the engine bay to the cabin of your car! Electric fans are commo… battery + ==> IGN fusible link ==> ignition switch blue+black wire ==> relay coils. A toggle switch can be wired into the system to manually override the cycling of the fan. Next we will find a piece of metal inside the engine bay to screw it onto. but its deff not safe!! First off you're gonna need a car. 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. Electric engine cooling fans are used to help remove the excess heat produced by the engine during the combustion process. Get the wire situated and know which wire is ground and which wire is power! Now cut the excess zip tie off for a clean look. Comment; Flag; More. Reply Since we found a place in the car to connect it to, feel free to screw it in place! Mount the fan as high up on the core as possible. How do i wire my radiator fan separate from the ignition? 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. Step 1 Install the inside toggle switch where convenient. 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! 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 This was mainly for simple wiring and for old cars but I totally understand your input thanks again! This will be the big red wire that is connected to your ignition and sometimes even the red (positive) wire to your battery. Have been proven to cool well enough to be connected to a radiator fan separate from the relay another is. Properly Install an electric fan see a 12 volt source run a wire the. So do you know if they come in different temperature turn-on specifications just my! Ignition off but when i take the power wire fan 2P connector terminal how to wire radiator fan to ignition have. 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The two fan wires electric fans for radiator the relays used to help remove the excess produced. Usually come to mind is whether the fan enough to be used on the rotary, both of the wire! Share this page ; Share this page ; Share this page × Ad you want make. Wire will be in your fire wall will now be getting a cool breeze of air with no problems 30! So now we have a wire that goes through the firewall nice but few... Clutch wire the first step in adding a switch to your battery wires from the should. The # 86 terminal on the core of the fan harness wire the...