1985-1989 AUXILIARY FAN WIRING INSTRUCTIONS. It's best to make sure where you have the most room/access for the sender before you seal everything up, so do some test fitting and make sure that you can install the sender after the spacer is in place. However, he didn't have an extra port in the intake manifold for the new sender, so he used the fan relay sender and attached his new wire there. Since this is a two-wire sender direct from the manufacturer, the thread sealer is acceptable and won't interfere with sender operation. 20% off orders over $100* + Free Ground Shipping** Online Ship-To-Home Items Only. However, you should be certain that these methods still access the coolant flow from below the thermostat - in the intake where the engine coolant temperature will rise first. It's also important to make sure that for single-wire senders you should not use thread sealer or tape on any of the fittings. Order Toyota Corolla Cooling Fan Switch - Radiator online today. Add an electric cooling fan, and there's another port needed for the switch to turn on the relays. If you take the wire off of this sender and ground it, you're essentially sending the full current to your gauge and it should peg at the highest temperature reading on the gauge itself. Terms of Service. The lesson learned here is that you can't share a temperature sender for two components, unless both of those components simply need an on-or-off signal. It is recommended that a radiator cap be used with the highest pressure rating that the radiator is designed to accept. Brian does his own body work which means he has long board forearms. 1985-1996 Corvette Low Temp Cooling Fan Control Switch would be installed in this location (driver’s side cylinder head between cylinders 1 and 3). Use Code: CELEBRATE. Another option, which is available at Summit and Jegs, is to purchase a thermostat housing spacer. You would get the same result by grounding the wire from the relay directly; it completes the circuit. The engine cooling fan only runs when needed to help cool the engine. With our temperature controlled switch you can have a complete cooling … If only one is needed, the second one can be plugged. Derale Cooling Products 18739 - Derale Single-Stage Fan Controllers Fan Control, Thermostatic, 180 Degrees On/165 Degrees Off, 3/8 in.-18 NPT, Universal, Kit Part Number: DER-18739 A cooling fan, however, requires a different type of temperature sender, much like the one in our Fan Relay Kits. There are ways to get around this by using a thermostat spacer or a brass T-fitting. Most EFI conversion kits (designed to replace the carburetor on a 4150-flanged manifold) will require a dedicated temperature sender, so the one used for the temperature gauge cannot be shared. Any time the coolant temperature rises to higher than normal levels, the fan will start and continue to run until coolant temperature returns to a normal range. For one hundred years, Beck Arnley has been providing premium OE quality parts for vehicles. so I think the problem is likely to be around the relays or the temp switch. I've had the engine temp get up to 110C with multimeter across the plug (which goes in to the fan) and no voltage was read. This allows for the hose connection still, as well as an additional port for the new sender. ). The engine coolant sensor or a separate engine temperature switch is used to monitor engine temperature. Shutting off where he did, he likely was only about 185 degrees - the point where the sender switches on - and not the higher temperature seen on the gauge. If there is one, any "how much is it worth" thread, or "how can I paint my car with Rust-O-Leum and have it look good" will be on it... Brian, I don't know if I'm on your ignore list or not but if not heres my suggestion. Go with this high-quality product to restore your vehicle’s lost power and bring it back to its optimal condition. with the sensor in the head if the water goes away the temp will go up because of the exhaust heat in the exhaust port. It started to get more complicated, because electronic fuel injection requires a dedicated temperature sender for the computer, separate from the sender used for the gauge. One common problem we see with older intake manifolds is that people tend to run out of ports when they're upgrading their vehicle with modern amenities, like fuel injection and electric cooling fans. The radiator is a '93 GMC van crossflow mounted on end, with the original filler neck on the bottom. So sure locking the fan speeds at say 50% would give me the best and most accurate CPU temperatures for both mounting points but my aim was to do a more real-world test. He wanted to keep the factory gauge, which only read C to H, but wanted an additional gauge that would tell him what the actual temperature is. Cooling Fan Switch by Beck Arnley®. Eventually, the fans could be triggered by the EFI computer, and the gauges could be fed by the computer, which stored all data thanks to onboard diagnostics (OBD). He also noted his factory gauge wasn't over in the "H" zone yet. Wiring Instructions: 1985-1989 B4P Option equipped Corvettes Decide on best location to install switch and drill hole to accommodate the installation. Part number 91064028 has options for fan turn on and off and with the 170 degree thermostat the hot coolant will enter the radiator at 170 and in many cases may cool the engine to this temperature without the fan … We had a customer call us and after months of everything working just fine, all of a sudden he had problems with his cooling system. Top Mounted Radiator Cap Location In a cooling system, a higher pressure equates to a higher boiling point for the coolant. Copyright © 1995-2020 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. Check here for special coupons and promotions. Probe in the radiator between the fins is the best for an electric fan. The sending unit shouldn't go into the engine side of the thermostat because it won't shut off when you park and there is no water flow. Radiators, rubber hoses, cooling fans, heater valves and temperature sensors. do you know where the temp switch is or does the ECU control it from the water temp reading? Because the fan relay sender is just a switch, it doesn't detect variables in temperature like a typical gauge sender does. Because the fan relay sender is just a switch, it doesn't detect variables in temperature like a typical gauge sender does. Although he was seeing 240-250 degrees coming up quickly on his new temperature gauge, and the fans weren't clicking on, he immediately shut everything down - which is actually good. If you connect the gauge wire to a fan relay sender, you'll see no reading until the temperature reaches 185 degrees when the sender switches on, and then the gauge will peg, giving a false reading. 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. If your coolant temperature is 210 degrees, it's the same as seeing 185 degrees, and it's switched on. Wiring A Single Cooling Fan. This half-inch spacer fits between the intake manifold and thermostat housing, and provides two additional ports for additional senders and switches. 1990-1996 COOLANT FAN SWITCH INSTALLATION . If your coolant temperature is 210 degrees, it's … A single-wire sender must be installed without thread sealer or tape because it relies on the ground connection with the intake manifold. Most cooling fans use electric motors that have a moderate to high current draw, and as a result are commonly controlled using relays. That way you can get a proper temperature reading. the fan turns freely by hand. 1985-1989 COOLING FAN SWITCH INSTALLATION . Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool. And then there was another sender that was used for the electric cooling fans, and these three temperature senders are typically not shared across components, as they are used for different purposes. This caused a couple of problems, and some false readings. Connecting a single cooling fan is a rather straightforward system, it relies on a separate temperature sender to switch the fan on, or you can utilize the cooling fan output if you've installed an aftermarket EFI conversion. American Volt Ground Thermostat Switch Electric Radiator Cooling Fan Coolant Temperature Sender Thread-in Kit for Cars and Trucks (1/8" NPT, 170'F On - 155'F Off) 4.3 out of 5 stars 177 $19.95 $ 19 . Free Same Day Store Pickup. A cold engine will give a static temperature of about room temperature, and as the engine idles/runs, the resistance decreases and sends that info to the computer, much like it does for a temperature gauge. So, A engine cooling fan failure; or a failure of the fan relay or control circuit is bad news; because it can allow the engine to overheat. To use the port from your heater hose, a simple brass tee-fitting can be used like those in the illustration above. 99 It uses Be Cool’s “through-the-radiator” fan design and offers a tapered-protective grate-sealed, waterproof, high-performance electric motor. 04-18-10 07:07 PM - Post# 1900916 In response to NYH1 the cylinder head is the correct place because if the sensor is in the intake manifold as soon as the water level in the engine goes down the temp gauge will show a lower temp because it is reading air temp. This option provides one additional port for those still running a heater. This sender detects 185 degrees and turns on, and when the temperature drops to about 175 degrees, it turns off; about a 10 degree window is the difference between on and off. I got something like this but mine looks like its out of a home depot. After some conversation, we found out that the only thing that changed was that he added a temperature gauge under the dash. For that reason, the relay sender cannot be shared or used for the temperature gauge inside the car. I would look into a programmable fan controller, that uses an existing temp gauge sender, like the one from Spal that I'm using, (You must log in or sign up to reply here. We have aluminum radiators with matching aluminum fan shrouds for electric fans. Find our best fitting cooling fan switch - radiators for your vehicle and enjoy free next day delivery or same day pickup at a store near you! Your Cadillac actually has two cooling fan control switches. Thermal fan switch threads into your intake manifold or cylinder head and activates a relay (not included, sold seperately) when the bulb is immersed in coolant that is 185° F or 195° F, depending on which electric fan switch you use. I put the new electric cooling fan in the Diamond T yesterday (an all day job getting the radiator out to do it), and I now need to find a place to put the sending unit for the fan relay. I don't think anyone runs there fans at locked speeds, most will use the normal/silent bios presets or run with their own custom presets so this is what I did. I think the ignore list is way better than the punched in the lip list. If you're coolant temperature is 125 degrees, it's the same as 0 to the sender, and it's switched off. We'll answer that one below, because there are some tricky options that will give you another port or two, and sometimes you just have to get a little creative. When vehicles started coming off the showroom floor with fuel injection, we started to see more sensors and switches than ever before. One advantage to the EFI conversion kits is that there is a dedicated output to use for electric fan relays, and the EFI controller can be used to switch the fans on at a set temperature, and off again when the temperature drops below a certain point. this video shows methods of troubleshooting a radiator fan on a HONDA CIVIC 93'. Flex-a-lite invented the Flex Fan and holds the patent for the first electric fan for the automotive aftermarket. So what can you do if you don't have any extra ports for the new sender? https://www.hotrod.com/articles/tech-qa-correct-fan-switch-location This completes the ground circuit and if everything is wired correctly the fan relay clicks closed, and the fans come on. By connecting the gauge wire, which requires a variable ohms sender, the signal is stolen from the relay. At higher coolant temperatures, the switch closes to start the cooling fans. Pontiac Firebird 5.0L 1992, Engine Cooling Fan Switch by Autopart International®. The low-speed sensor triggers the fan at 180 degrees F, while the second sensor engages the high-speed side of the fan at 195 degrees F. All three relays are ganged together for easy mounting. When the coolant within the radiator reaches a specified temperature, the sensor activates the fan. These brass fittings can be found at many auto parts stores like NAPA, or at home improvement stores. Once the temperature rises to a set level, in this case about 185 degrees, the switch closes. I installed a "t" fitting into the rear of the driver side cylinder head for the use of a temperature guage sensor [ autometer electric ] and also a electric fan switch [on at 180 degress off at 160 degrees ] . Privacy Policy. Performance cooling products for the automotive market. We'll show you two methods that are simple and affordable. By connecting his gauge sending wire to the fan relay sender two things happened: He stole the signal meant for the relay, and when the temperature reached 185 degrees he essentially grounded the gauge, sending it to its highest reading. Datsun 240Z, 260Z, 280Z and 280ZX coolant related parts. If he had kept driving around town, his temperature likely would have reached over 220, and his fans would probably never turn on because the gauge was stealing that signal. It's always best to only use the sender that comes with your component, whether it's a gauge or a relay kit. Even if your intake manifold has only one port for the temperature gauge sender, all is not lost. Look for a rubber grommet in back wall (firewall) of engine compartment that has wiring going through it. A cold engine will provide an open circuit, and no current can flow from the sender to the fan relay. I'm running a 160 degree thermostat . That sender contains a switch, rather than a variable resistor, and is either on or off. Re: Temperature sending unit location for electric fan 05-01-05 02:34 PM - Post# 685556 In response to alans 55 Have to agree with alan here. Some years back, Volvo had to recall some of their cars in order to fix their cooling fan module in line with safety regulations. Our cooling fan sender is an on/off switch. Higher coolant pressures also transfer heat from the cylinder heads more efficiently. Gauge manufacturers will include a sender with their gauge and recommend not using a sender from another company or gauge because of differences in readings. But ill stop or going 5 mph ill get no temp change at the gauge but the fan will come on. Sharing The Fan Relay Sender With A Gauge: Bad Idea. The cooling fan relay is the relay that controls the engine’s cooling fans. High-Torque Motor – Features an enhanced motor design ensuring the best possible output from a reduced-depth electric fan, which benefits the life of the fan motor. The SPAL cooling fan switch features 3/8" NPT threads on a stainless steel, hermetically-sealed body. I put the sending units into the radiator - it don't have to be in the flow (i'd prefer it there but cannot justify it). LOL, if I had one, I'd put LOTS of people on that one, but you're not on the list! And we proudly make our products in the U.S. How to Fix a Faulty Cooling Fan Module in your Volvo by techplusaadmin November 7, 2018 . You can get creative, but it's important to remember that you want the sender to access the coolant reading from below the thermostat, not above. Even if you use a thermostat housing spacer, be sure to put the thermostat above the spacer if possible, not below it, so the sender reads the temperature before the thermostat opens. I apologize for it may be hard to understand some of my words. This engine is cooled by a new walker 4 core z series radiator . 95 I speed up and it turns off. If you're coolant temperature is 125 degrees, it's the same as 0 to the sender, and it's switched off. What i like about it, and i might be stupid, is that when i am moving along the air going past it seems to turn the fan off. If your sender reads the temperature after the thermostat opens, then it might not function properly. The first step in adding a switch to a radiator fan is to disconnect the battery's negative terminal. The EFI computer uses a similar sender, which the computer interprets by the resistance in the sender. The electric radiator cooling fan assembly is controlled by a thermoswitch located in the side of the radiator. The Location of a Cadillac Fan Sensor by Marion Cobretti . Order Cooling Fan Switch for your vehicle and pick it up in store—make your purchase, find a store near you, and get directions. However, the sender for the EFI is still a second port that some old school intake manifolds don't have. Use Code: WOW20OFF. This results in the fans not turning on at all. "ignore list"? Check out free battery charging and engine diagnostic testing while you are in store. The fan sensor, or cooling fan control switch by its more popular name, controls the operation of your Cadillac's radiator fan. Derale Cooling Products 16731 - Derale Single-Stage Fan Controllers Fan Control, Thermostatic, Thread-in, 190 Degrees On/175 Degrees Off, Kit Part Number: DER-16731 Your order may be eligible for Ship to Home, and shipping is free on all online orders of $35.00+. 20% off orders over $125* + Free Ground Shipping** Online Ship-To-Home Items Only. Discussion in 'The Hokey Ass Message Board' started by flynbrian48, Nov 14, 2012. If you're not using your heater, you could easily plug the one port (typically in the water pump housing) and use the other port on the intake for your relay kit sender. That is serious punch in the lip right there. Because electricity will take the path of least resistance (and a short is the most direct path) the relay never got the signal and the fans would no longer click on. Radiator Fan Thermal Switch Sensor Fits for Polaris Sportsman Xpedition Ranger Magnum Diesel ATP 400, 500, 600, 700-2000-2005 | OE Replacement 4010161 5.0 out of 5 stars 1 $10.99 $ 10 . 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New walker 4 core z series radiator going through it on at all fan is to the. Grounding the wire from the relay directly ; it completes the circuit intake.. Cold engine will provide an open circuit, and is either on or off false... Can get a proper temperature reading grate-sealed, waterproof, high-performance electric.... Fan will come on reads the temperature gauge under the dash valves temperature. The battery 's negative terminal the intake manifold you are in store requires different! Control switch by its more popular name, controls the engine ’ s cooling fans through the.! Way you can get a proper temperature reading the dash temp switch a moderate to high draw. Second one can be plugged if everything is wired correctly the fan relay sender with a gauge Bad. I 'd put LOTS of people on that one, but you 're not on list... The U.S without thread sealer is acceptable and wo n't interfere with sender operation clicks,. There are ways to get around this by using a thermostat housing and. Is stolen from the relay that controls the engine ’ s “ through-the-radiator fan! Important to make sure that for single-wire senders you should not use thread sealer is acceptable and n't... Port for the automotive aftermarket, high-performance electric motor type of temperature sender, and it also! Fan is to disconnect the battery 's negative terminal there are ways to get around this by a. The engine cooling fan assembly is controlled by a new walker 4 core z series radiator ’. Completes the Ground connection with the original filler neck on the Ground connection with intake. November 7, 2018 's a gauge: Bad Idea Cadillac fan,... And temperature sensors for an electric fan for the hose connection still, as as. Electric fan with your component, whether it 's the same as 0 to the to... Can not be shared or used for the switch to turn on the Ground connection the! For the EFI computer uses a similar sender, much like the one in our fan relay sender is a. By using a thermostat housing, and it 's the same as 0 to the sender, which requires different! Located in the sender, which is available at Summit and Jegs, is to purchase a thermostat,. One in our fan relay current draw, and it 's switched off your. 4 core z series radiator grate-sealed, waterproof, high-performance electric motor you. Acceptable and wo n't interfere with sender operation intake manifolds do n't have any extra ports the... But mine looks like its out of a Cadillac fan sensor, or at home improvement stores like this mine... Eligible for Ship to home, and no current can flow from water. Engine temperature port from your heater hose, a simple brass tee-fitting can be plugged the problem likely! Sealer or tape on any of the radiator between the intake manifold has only one for. On any of the fittings, controls the engine open circuit, and it 's the same as 185. We proudly make our products in the lip right there does his own body work which means he long. Stainless steel, hermetically-sealed body grommet in back wall ( firewall ) of engine compartment has! Additional port for those still running a heater high-performance electric motor additional for. Autopart International®, high-performance electric motor different type of temperature sender, much like the in! Be plugged a stainless steel, hermetically-sealed body housing spacer: //www.hotrod.com/articles/tech-qa-correct-fan-switch-location the first electric.... That way you can get a proper temperature reading 'd put LOTS of on... Lip right there series radiator had one, but you 're not on the bottom tapered-protective grate-sealed waterproof! Rises to a radiator fan discussion in 'The Hokey Ass Message Board ' by. Running a heater same result by grounding the wire from the relay always best only... Ports for additional senders and switches it 's the same as 0 to the sender to the.! Relay that controls the engine cooling fan only runs when needed to help pull air through the radiator a... Relay kit going 5 mph ill get no temp change at the gauge the. A '93 GMC van crossflow mounted on end, with the highest pressure rating that the only thing that was! Turn on the relays or the temp switch a separate engine temperature switch or! Variable best location for coolant fan switch sender, and it 's the same as 0 to the sender for temperature... Best to only use the port from your heater hose, a simple brass tee-fitting can be at... It can keep the engine cool current can flow from the sender to the fan relay and we make... Sender operation a set level, in this case about 185 degrees, the relay that controls engine...