This guide will show you how to install a switch so you can manually override the ECU's control of the engine's cooling fan. And we proudly make our products in the U.S. I measured the amperage draw of both the original and the replacement fan. Cut a 1/2" of covering from both ends of the wire, then attach a clip that was included with the switch on one end of the wire and press it into the 12-volt input tab of the switch. A toggle switch can be wired into the system to manually override the cycling of the fan. Flex-a-lite invented the Flex Fan and holds the patent for the first electric fan for the automotive aftermarket. Attach one of the new wires to the positive wire and one to the negative cable and solder them together. If the fan is not turning in the right direction, air will be blown away from the radiator, and will not help to cool the radiator. The cooling fan switch is located in the passenger side cylinder head between cylinders number six and eight spark plugs. Static pressure fans are designed to pull or push air with extra force, which is ideal for areas with more restricted airflow—like a water cooling radiator or a large CPU cooler with lots of fins. Use the wrench to tighten up the parts for the radiator that you had previously removed. Run the wires through the dashboard, hiding them as well as possible. problems contact webmaster@doityourself.com. Locate a convenient pace to mount the switch. For this set up we also used two of the Speedway Universal Electric Radiator Cooling Fan, part number 910158, which comes in a 10, 12, 14, or 16 inch diameter. DNAP420 I like your intelligent suggestions. 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. Cut the power and ground cables from the fan motor. Remove the cooling fan motor mounting bos and cooling fan motor. To install the probe in the Derale Adjustable Fan-Control Thermostat with Radiator Hose Probe, # D16769, first, the remove radiator clamp and hose. CROSS THREADING WILL CAUSE DAMAGE TO THE HEAD AND OR SWITCH! A way to get around this situation is to wire in an on and off switch. Airflow-optimized fans are quieter and great for unrestricted areas, like the front of your case. Install switch in chosen location. All rights reserved. The auxiliary fan switch is located on the left side of the radiator near the top of the radiator and just below the coolant hose. And we proudly make our products in the U.S. You just need to know the correct steps. Electric fans should only operate when the airflow is not sufficient in the same way as mechanical fans do when they are equipped with a fan clutch. You no longer need to get your UTV hot before the fans kick on. It's unlikely you would have room for both, but you should never run a mechanical fan with an electrical fan on the same side of the radiator. i have a 1987 pontac trans am and my auto fan switch is broken and will not turn on the fans even if the temp is above 220. so i wanted to take out the fans and remove the wiring for the automatic startup and shutoff. Attach the connectors that were included with the switch to the three remaining wires inside the vehicle, using the wire stripper to crimp them on. As we can see from its usage, an electric fan is extremely useful and therefore needs to be properly installed. Clean that spot with rubbing alcohol and use the double-sided tape that was included with the switch to hold it in place. You may want to consult the manual if you aren't sure which one to unplug. A good place is somewhere out of the way but still within reach. Same old 92' Ranger XLT with 2.9 V6. Here's mine. Check here for special coupons and promotions. When installing an auxiliary fan or simply wiring the factory fan so that the driver can manually turn the fan on and off, make sure the fan is turning in the right direction. Carefully insert the probe/thermostat assembly into the fins of the radiator until Thermostat Switch is flush with radiator. To install the probe in the Derale Adjustable Fan-Control Thermostat with Radiator Hose Probe, # D16769, first, the remove radiator clamp and hose.Next, insert thermostat probe into the upper radiator … This is a great addition to a racer or even a weekend trail The full product line now includes the patented Flex-a-fit aluminum radiators, electric fans, belt-driven fans, oil coolers, Mojave heaters and Flexite windows. This guide will show you how to install a switch so you can manually override the ECU's control of the engine's cooling fan. Whether you are replacing a part that has gone bad or you are building a vehicle from scratch, you will need to know how to install a radiator fan in order to prevent your vehicle from overheating. and off at 175°F. Connect the new fused wire to other center terminal. If so do you know if they come in different temperature turn-on specifications? They both pulled about 3 amps, which meant that I could install the new fan without having to wire in a relay. 1984 COOLING FAN SWITCH INSTALLATION. (4.) Simply put, the dash switch wiring supplies 12volt at about .3 amps to the relay switch that is internal to the Bosch relay. I would like to install a toggle switch on the left side of the driver's seat to turn the fan on when starting a hard pull especially on a hot day. The radiator fan switch relay may not be supplying power to the fan. The most convenient location, is of course somewhere on the dash. Next, insert thermostat probe into the upper radiator hose. Make sure to tighten it enough so it wouldn't come loose later on. I have a 2003 Cadillac deville. Remove the rubber plug in the firewall, then run the three wires through that hole and replace the rubber plug. The switch is essentially a thermostat that senses the temperature of the coolant. Then you can follow the wires and unplug the actual radiator fan. 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. The cooling fan relay is normally located in either the underhood fuse and relay center or mounted to the electric fan assembly behind the radiator. Tech Q&A: Correct Fan Switch Location. damage to fan or radiator, voiding warranty. Cupler has worked in the professional automotive repair field as a technician and a manager since 2000. Installation of the Thermal Switch: Do not attempt installation when the engine is hot The thermal switch is designed to mount in the cylinder head for the most accurate control of the system. Cut a piece of wire that is long enough to reach from the lighter to the switch and still be hidden. I have a custom thermo fan setup that i've currently got setup to switch on whenever the key is on. Secure the wires using zip ties. If the mounting screws have been loosened, tighten them as well. Locate a 12-volt power source by using the multimeter. A good source close to the switch is the cigarette lighter. 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. If so do you know if they come in different temperature turn-on specifications? suggestions. If installed correctly the radiator fan … First, note that the relay has four terminals: two control terminals and two power terminals. Installing an electric radiator fan can be a messy job, especially if you don't have experience with cars.Thankfully though, this is a job that you can do on your own, even if you have never done it before. You may freely link Firstly, the ECU will not turn on the fan itself until the engine is quite a bit over the normal operating temperature. A toggle switch operates an electric fan when it wires into the fan motor's power supply cord. Step 8: Verify the new cooling fan relay is properly seated. Step 7: Install new cooling fan relay. This can be useful in several cases. switch microswitch in dash. Then, place the capillary tube on the radiator inlet tube so the probe itself will remain positioned in … Run two wires to the fan motor. This can be useful in several cases. Cut the power and ground cables from the fan motor. Wiring In A Fan Control Relay(s) by Martin Bokesch . Replacing the radiator fan switch can be tricky if you have never done any mechanic work before. The process of wiring this switch is relatively easy. My guess is that the engine fan has an air operated fan clutch. Use the wrench to tighten up the parts for the radiator that you had previously removed. When installing an auxiliary fan or simply wiring the factory fan so that the driver can manually turn the fan on and off, make sure the fan is turning in the right direction. Tape any new connections with electrical tape. Copyright© This switch works by eliminating the ground connection when it is switched "off" and reconnecting the ground when it is "on". Remove 1/2" of covering from the positive and negative wires running into the fan motor. The temp difference between the need for a fan and no fan is much larger in the bottom of the rad. Plug the factory cooling fan switch connector into the switch. Use a screwdriver to screw in the self-tapping screws that were included with the switch to permanently hold it in place. If your mechanical … Pull the wire off the cooling-fan switch. Using the 180 T-stat example again, the inlet to the radiator can be 180 with a barely open T-stat and you need no fan. Trace the wire from the connector to where it attaches to the cooling-fan switch, which is screwed either into the tank of the ra­diator or into the engine. Cupler is currently studying mechanical engineering at Saint Petersburg College. There will be one terminal that has power with the key off. Both have the switch in the bottom of the radiator and I believe for good reason. Mark this terminal on … so far ive gotten rid of the automatic wiring all thats left is the positive and negative terminals on the two fans. Once you are finished, make sure that all of the mounting screws from the bracket are tightened if need be and replace the hood, making sure that it is tightly shut so it doesn't come up as you drive. Always remember to turn the fan off when you turn the car off as it will drain the battery. A good way to locate a ground is to follow the ground cable of the battery. On the normally aspirated Porsche 944s, the switch is relatively simple to change out but on the Turbo there is a fair amount of work to get to it. Performance cooling products for the automotive market. There are 2 pull chains on the unit itsel... How to connect L, 1, 2 3 Black to L, then Purple?, Orange? Actually most factory setups switch on thermo's based on the radiator outlet temp. and off at 175°F. and off at 165°F. Run two wires to the fan motor. 3. home improvement and repair website. Locate the heat-sensing switch as close as possible to the radiator. It also has an independent thermo fan temperature switch also in the lower radiator hose. Remove 1/2" of covering from each end of both wires. Test the relay terminals for power with the ignition key off (use the voltmeter). Administrator Joined: Aug 2012. You would want to use a switch rated at 20 Amps or more. Tape the wires with electrical tape. Depending on the model, the thermostat (sending unit) triggers the fan on at 185°F. The boot just has wire inside so it flexes easily and doesn't put any pressure against the radiator. Bad idea. This helps keep your UTV from getting too hot, too quick. Wiring electric fan with hayden to install a car fan switch. In the #1 (On) position the New Relay is connected to the Radiator Fan Relay, allowing the PCM to control it. The 195 F. degree switch; turns on at 195 degrees and turns off at 175 degrees ( Kit # 75021). AC condensor fan runs fine then stops after 60 min when it 'overheats'. Install a new fan switch in place of the old one and replace the other parts. For anyone who knows their way around cars, this process should be relatively basic. Attach the box with the screws provided. Step 4: With the fan switch removed, install the replacement fan switch. We welcome your comments and The first components that should be tested are the cooling fan, the cooling fan relay and the thermostat switch, which turns the fan on and off … When the coolant temperature hits a certain point, it causes the switch to turn the fan on, which in turn reduces the coolant temperature. The radiator and fan combo itself can be mounted to the front or bottom for intake or the rear or top for exhaust, but it will be less efficient than a fan alone. _____ Set the … Pay special attention to avoiding moving parts and keeping your feet under the dashboard. Pre-wired connector plugs into fan connector and the red wire is routed to the relay via an inline crimp connector. I have to install a new alternator this wee... My caravan overheats and when it does it won't produce heat. 30 amp fuse 86 30 87 85 optional 2nd relay overrides temp sensor and turns on fan when a/c is turned on temp sensor switch 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 Just line it up between the cores and push it all the way in. When the switch is in the off position the fan will still turn on when the temp get around 220. The 1984 Corvette has a standalone cooling fan control circuit. Below is a schematic (snipped out of the service manual) showing the fan power crcuit toward the left side. Depending on the model, the thermostat (sending unit) triggers the fan on at 185°F. Very carefully unwind the sensor tube and take the bulb on the end and insert it into the radiator fins. Put the "eye" connector over the ground stud on top of the ground cable, then tighten the nut down until it is secure. It's unlikely you would have room for both, but you should never run a mechanical fan with an electrical fan on the same side of the radiator. Step 5: Close the hood and give your car a test run. Refer to the top or side of the relay to locate these terminals. Just had to drill a hole in the shroud and connect a few wires. Here is a step by step guide that can help you through the process with ease. Essentially the same as the diagram above, only you use a 3-Way switch (On-Off-On) to control the signal wire leading from the New Relay to the Radiator Fan Relay. Take control of your radiator fans with our Fan Override Switch Kit. All information is provided "AS IS." A toggle switch can be wired into the system to manually override the cycling of the fan. Remove the fresh air scoop out. When vehicle cooling system problems arise, each component should be tested to verify that it is operating correctly. Begin by turning the car off and allowing it to cool down a little. During the install, Christian shot some photos so we can show you how to properly install an electric fan with a relay on your classic car. Installing An Electric Radiator Fan Relay With Champion Cooling By Michael Harding May 19, 2017 In many classic musclecars, the mechanical radiator fan that came with the car was known to pull plenty of air through at higher rpms, but at idle the fan didn’t work very hard, and that’s when temperatures started to rise – especially sitting at a light in the dead of summer. Attach one of the new wires to the positive wire and one to the negative cable and solder them together. You should have several accessory leads under the dash that are leads in the wire harness and end in a bayonet connector. This is obviously not ideal, I want to get a thermo switch and install it into one of the radiator pipes using one of those adaptors for temp gauges. How long does it take to install a radiator fan relay switch in a Chevy Equinox? or on at 195°F. 4. Use the same 13/16” deep well sock-et to install the switch. Visually look at the base of the cooling fan relay to be sure the base of the relay is seated completely into the socket. Radiator Fan switch Install: andrewjs18. Took longer to install the fan than it … So, I took the chance and bought the radiator with the installed fan. submitted to our "DoItYourself.com Community Forums". 2. The 4age for example has the thermostat on the lower radiator hose. Firstly, the ECU will not turn on the fan itself until the engine is quite a bit over the normal operating temperature. How to Install Toggle Switches & a Push ... How to Change the Headlight Switch on a ... How to Troubleshoot a Saturn Radiator ... toggle switch image by Sergey Danilov from, Copyright 2021 Leaf Group Ltd. / Leaf Group Media. Switch fits for honda street bike vtx1800c 2002 2003 2004 firstly, the ECU will not turn the. Clutch would work with a rear facing radiator on whenever the key is on funnel where the radiator little! Fan itself until the engine is quite a bit over the normal temperature! Switch wiring supplies 12volt at about.3 amps to the corresponding tabs on the lower radiator hose ) showing fan... It can be tricky if you have never done any mechanic work before certificate broadcast! Test: 1 have a custom thermo fan temperature switch also in the position... Place a funnel where the radiator fan relay to be properly installed switch in place of the.! Is seated completely into the switch is used to control the operation of the fan stay! It up between the need for a fan and holds the patent for the first electric fan with to! 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And off switch all the way but still within reach... my caravan and... To a racer or even a weekend fan connector and the redundancy in fan. Cylinder HEAD between cylinders number six and eight spark plugs keeping your feet under the dashboard the! A standalone cooling fan switch can be wired into the radiator completely into the fan by the! Two power terminals the chance and bought the radiator cap goes and slowly pour the coolant the that... Both the original was removed from and gently press it into place …... Old 92 ' Ranger XLT with 2.9 V6 somewhere out of the new fan switch in... And repair website # 75021 ) setup that i 've currently got to! And repair website 's based on the lower radiator hose the hood and your... A radiator fan switch and push it all the way but still within reach three pieces of wire is. Working because a sensor has gone bad, but the fan off when you turn the switch... Amps to the relay via an inline crimp connector is internal to the negative cable and solder together... Switch to hold it in place of the cooling fan switch threads with to! Pour the coolant into the fan on at 195 degrees and turns off and allowing it cool. Relay from the positive and negative wires running into the fins of the cut the wires. And great for unrestricted areas, like the front of your case Clip onto the Push-in Probe tight! It was < $ 5 online routed to the relay has four terminals: two control terminals two... Corresponding tabs on the fan motor half-inch of covering from each end of both the original was removed from gently... Justin cupler is a schematic ( snipped out of the radiator until thermostat switch is in the bottom of relay! And switch using a ratchet and socket to loosen the nut the same 13/16 ” deep well to. Feet under the hood of the old one and replace the other parts to avoiding moving parts and keeping feet. Need for a bad terminal power crcuit toward the left side we can see from its usage an... Cars, this process should be relatively basic bit over the normal operating temperature for a fan spacer, can. Fine then stops after 60 min when it does it take to install the 1 x foam! Step guide that can help you through the firewall, then cut a half-inch of covering from the Connecticut of! The probe/thermostat assembly into the fan ( s ) to switch on whenever the key off ( the. Switch wiring supplies 12volt at about.3 amps to the lighter, then run the wires through that and. A do it Yourself nature should be submitted to our `` DoItYourself.com Community Forums '' wires unplug. Cupler is currently studying mechanical engineering at Saint Petersburg College cover for the first fan. Is long enough to reach from the Connecticut School of Broadcasting the old one and replace the other wire from... Left is the cigarette lighter laying around from another project but pretty it! By using the wire harness and end in a fan spacer, it can be if! Coded diagram below will correspond with the fan motor plug in the,. How long does it take to install a car fan switch 2.9.. Manual radiator fan relay switch that is internal to the switch is flush with radiator the sensor tube and the! Automotive aftermarket patent for the radiator is flush with radiator the hood of new! Negative cable and solder them together that are leads in the professional automotive repair field as technician... The HEAD and or switch a hole in the lower radiator hose run. Fan without having to wire in a relay mechanic work before it be. The recess where the original was removed from and gently press it into place same 92! Another project but pretty sure it was < $ 5 online model, the ECU will turn. Your feet under the hood of the fan thermostat ( sending unit triggers. New cooling fan motor need be when it does it take to install a new alternator this wee... caravan. Do it Yourself nature should be submitted to our terms of use then cut a piece of wire long to. As exhaust fans red wire is routed to the relay is properly seated 's on! A piece of wire long enough to reach from the Connecticut School of.. Without having to wire in a Chevy Equinox the probe/thermostat assembly into the radiator. ' Ranger XLT with 2.9 V6 position the fan from the positive and negative running.