Wired like that, the fan will come on when the coolant temperature reaches 185 and will stay on until the coolant drops below 175 degrees. Your order may be eligible for Ship to Home, and shipping is free on all online orders of $35.00+. You can return the item for any reason in new and unused condition: no shipping charges. Works well. Maybe it would at a really high temp. If you were using this for the gauge or factory c…. The 40-amp relay(s) are a waterproof design, and the temperature sending unit is designed to be … {"modules":["unloadOptimization","bandwidthDetection"],"unloadOptimization":{"browsers":{"Firefox":true,"Chrome":true}},"bandwidthDetection":{"url":"https://ir.ebaystatic.com/cr/v/c1/thirtysevens.jpg","maxViews":4,"imgSize":37,"expiry":300000,"timeout":250}}, Top End Quality * Top End Service * Top Speed Shipping. and off at 175°F. Most cooling fans use electric motors that have a moderate to high current draw, and as a result are commonly controlled using relays. A trinary switch will allow your electric fan to turn on and off based on either engine temperature or AC system demand. $90.10. 2005-2013 Corvette Radiator Used Nice OEM (Fits: Chevrolet Corvette) ... Radiator Cooling Fan For 98-2002 Chevrolet Camaro Pontiac Firebird. 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! A toggle switch can be wired into the system to manually override the cycling of the fan. There was a problem adding this item to Cart. Using these to control fans on my 82 Cutlass Supreme. Note the mounting bolt size. Fan Switches, Digital Thermatic Fan Switch Kits, Single/Dual, Radiator Probe Sending Unit, 104-230 degrees F Range, 12 V, 24 V, Kit Part Number: DCW-DC-0444 ( 42 ) Reviewed in the United States on September 10, 2017. This specific temperature range works best with a 180 degree thermostat. Make sure you get a relay capable of delivering enough current to overcome the inrush current ( at least 2x the rated amps of the electric fan). Q:Can this be controlled by a flex-a-lite manual switch? Was: $198.58. This was a mediocre way of doing things, primarily because the current required to spin the fan was drawn through the switch itself. Shop Street Rod Cooling Fan parts and get Free Shipping on orders over $99 at Speedway Motors, the Racing and Rodding Specialists. ${cardName} not available for the seller you chose. You mentioned a fan controller switch set to 230 degrees, and while several aftermarket controllers have a … The SPAL cooling fan switch features 3/8" NPT threads on a stainless steel, hermetically-sealed body. Its dual electric fan setup solved my 350's cooling woes and I can drive the car any time of day. $196.00. PartsSquare 185 to 200 Degree Electric Engine Cooling Fan Thermostat Switch 3/8" Pipe Thread NPT, Amazingli 200 to 185 Degree Electric Engine Cooling Fan Thermostat Temperature Sensor Switch. Sensor(s) in the cooling fan circuit handles the signal to turn on the cooling fan. I have a flex fan and an aluminum radiator and does not seem to have a problem with overheating. I have had a lot of people ask me about GM Radiator cooling fan diagnosis in the past. This part was used to switch a radiator fan on at 185 and off at 175. Includes initial monthly payment and selected options. However, yes- you could put a switch in series if you wanted something like a bypass. We encountered an error while updating the page. Had some minor leaking so had to use Teflon tape and electrical connection was still good (at least enough to power a fan relay). Howeve…. HOWTO: Install a Cooling Fan Bypass Switch Written by Wild Weasel. Order Cooling Fan Switch for your vehicle and pick it up in store—make your purchase, find a store near you, and get directions. Q: The thermo fan switch is designed to control operation of the electric thermo fan(s). Please try again. In order to navigate out of this carousel please use your heading shortcut key to navigate to the next or previous heading. For 1982-1984 Volkswagen Quantum Cooling Fan Switch … TURN RAISE 175-185 Degree Engine Electric Cooling Fan Thermostat Temperature Switch, Cooling Fan Thermostat Switch, 60Amp Sensor Relay New kit. Triggers the fan relays right at 185 according to my Auto-meter dash gauge. Buy It Now. Guess I must be an idiot... solved a problem manufactured by ford / lincoln/ mercury on the 4.6L V8, Reviewed in the United States on April 18, 2018. This is where an automatic activation system is desired. I installed this temp switch to trigger the cooling fans on my aluminum radiator. Check here for special coupons and promotions. Free shipping. Reviewed in the United States on May 24, 2019. Most gauges have their own manufacturer's provided sending unit to operate the gauge . Please make sure that you are posting in the form of a question. This can be useful in several cases. To add the following enhancements to your purchase, choose a different seller. Can this be used with a electric temp gauge as well, or is it just a sensor to trip the fa…, A: Customs services and international tracking provided. I installed this in the port of the water pump of my SBC. Use Code: CELEBRATE. [High-efficiency Fan Thermostat Temperature Switch]: Turns your electric engine cooling fan on at 185 degree and off at 175 degree [Fits most engines]: 265 283 305 307 327 350 383 400 396 402 427 454 472 502 260 289 302 351W 347 352 360 390 406 427 428 429 460 351C 351M 400M 273 318 340 360 361 383 400 413 426W 440 455 330 326 engines If it had a temperature range ie cut in at 200 deg and cut off at 190 deg the fan could cycle properly instead of remaining on all the time. 1966 1967 SBC W/ AIR CHEVY CORVETTE 7 BLADE FAN 19" 3991431 914692471 FREE FEDEX. Full content visible, double tap to read brief content. Note the clutch that is used. Your question might be answered by sellers, manufacturers, or customers who bought this product. . or on at 195°F. Measure the fan size, the biggest that will go in your truck. The thermostat is pretty much std at 185/190 deg. A couple of decades ago, it was popular to simply add a switch under the dash to control an electric cooling fan, often referred to as an auxiliary fan. These are made to control low current relays. Buy It Now. Please try again. This switch applies the ground to the coil side of the relay and your key on hot or ignition wire will provide the +12V. 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. This specific temperature range works best with a 180 degree thermostat, Reviewed in the United States on June 28, 2017. Tnx, A: View cart for details. FAERSI 175-185 Degree Electric Cooling Fan Thermostat Kit Temperature Sensor Temperature Switch 40 50 60 AMP Relay Kit, PartsSquare 3/8" 185 Degree On 170 Degree Off Radiator Cooling fan Thermostat Temperature Switch Kit Compatible with 265 283 305 400 347 352 360 390351M 400M 273 318 340 360 361 383 400 ENGINES, © 1996-2021, Amazon.com, Inc. or its affiliates, Fan Thermostat Temperature Switch with 3/8" Pipe Thread, 185 to 175 Degree Electric Engine Cooling Fan Thermostat Temperature Sensor Switch, Fits 10" 12" 14" 16" Fan (With Pipe Thread), Or get 4-5 business-day shipping on this item for $5.99 Reviewed in the United States on August 8, 2020. This shopping feature will continue to load items when the Enter key is pressed. I think that due to its size it is just an on off switch. Enhancements you chose aren't available for this seller. Hypertech also suggested along with the new temp switch… Vintage and Classic Car & Truck Accessories, Tell us about your vehicle to find the right parts faster, - Pro Series Extreme 19" 19 in Steel 4 Blade Fan cooling Fits Sbc Bbc Chevy Ford, Great price compared to similar brand new items, Leave feedback about your eBay search experience - opens in new window or tab. When you turn the car off, remember that the temperature still climbs for 5 minutes, so you have a buffer. Since you have the gauge and the fan wired in parallel, the relay may be picking up a sneak path to ground through the autometer gauge and which is then turning the relay on, effectively bypassing the temp swich altogether. Temps on/off right on. Buy 1955-1957 Chevy Electric Cooling Fan Temperature Sending Switch for only $41.99 in our huge selection of parts. Brand New. Will update if it doesn't last for a reasonable amount of time. We don’t share your credit card details with third-party sellers, and we don’t sell your information to others. Once the temperature reaches this cooling stage, the coolant fan will shut off. Automotive Replacement Engine Radiator Cooling Fan Motor Relays. Q:What is the thread diameter of the 195/210 sender with and without the adapter? A gauge won't run off a temperature switch. Something went wrong. Street Rod Cooling Fan parts in-stock with same-day shipping. No emissions, no sensors. I had to use the adapter to fit that port. I installed this temp switch to trigger the cooling fans on my aluminum radiator. Dimensions: Approx. On the other side of the coin, lets say your buddy borrows the hot rod and doesn't know to switch on the cooling fan when sitting in traffic. A:This device eliminates the need for a manual switch - making fan control automatic. Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool. Error posting question. Find answers in product info, Q&As, reviews. Bring a tape measure, paper and pencil. Can this be controlled by a flex-a-lite manual switch? IT WORKED GREAT 40,000 miles and then i sold the car, took me 3 years to figure out, and this is the way i solved a problem manufactured by ford / lincoln/ mercury on the 4.6L V8 You will need yo buy a thermostat that is 180 replace the 190 that is in there. 20% off orders over $100* + Free Ground Shipping** Online Ship-To-Home Items Only. We work hard to protect your security and privacy. Sorry, we were unable to perform your search at this time. This part was used to switch a radiator fan on at 185 and off at 175. The switches are controlling two fans on the radiator on my converted bus RV. Depending on the model, the thermostat (sending unit) triggers the fan on at 185°F. Please try your search again later. Keep in mind that I live in Phoenix, Arizona. Photo courtesy of Sfoskett~commonswiki on Wikipedia. Hypertech recomended that to further solve our cooling woes, the stock fan-cooling switch be replaced with an updated lower temp switch. Customer Questions Please try again later. See each listing for international shipping options and costs. (Prices may vary for AK and HI. To determine which fan/clutch setup to use go to a Pic a Part junk yard. Unlike a belt-driven fan, an electric fan can spin at full speed even when the car isn’t moving, and with the engine idling. ","fractionalValue":"99","symbolPosition":"left","hasSpace":false,"showFractionalPartIfEmpty":true,"offerListingId":"Z54O0hfZb0KNgPmh4GDbW542H7YOZsxASUJ1xzGpy0OZbVt%2Fzgz2pNrTFoOalzZ4TxfsUQ3YA80MtmpC%2BqG7yfVhrvMFntw%2F2o1SlUv25pVR8GHRqZNC5ed%2F0eVfK8r1wAL6AbZy2VX9x9HHf8CP99oJPDgPkQhNLMjA2Q7dTwn0yIyuxv5n13Hpn4S6jpCZ"}], Select a location to see product availability. Pre-wired connector plugs into fan connector and the red wire is routed to the relay via an inline crimp connector. My new truck has a SBC 383, cam, Edelbrock carb. A-Team Performance Radiator Electric Cooling Fan 16inch Heavy Duty 12V Wide Curved 16" 8 Blades Thermostat Kit 3000 CFM Reversible Push or Pull with Mounting … We are sorry. Number of bids and bid amounts may be slightly out of date. Watch; Chevy SBC Truck Radiator Fans,Set of Two 12" Electric Cooling Fans, w/Relay Kit. The fan(s) are triggered via a temperature switch and 40-amp relay combination. Brand New. To the others that say they dont last, make sure you arent trying to run your fans THROUGH these switches. This device eliminates the need for a manual switch - making fan control automatic. Also that temp switch supplies the switchable ground connection to the fan relay. 5% extra savings coupon applied at checkout. Please reload the page, [{"displayPrice":"$15.99","priceAmount":15.99,"currencySymbol":"$","integerValue":"15","decimalSeparator":". Collosal waste of my time. Testing the Cooling Fan Temperature Switch Reviewed in the United States on November 18, 2020. There was a problem completing your request. Free shipping. Closely examine the wires for cuts or damage. Im installing a few painless fan relay kit PN PPP30103 in 350 sbc with edelbrock rpm performer heads and dual quad intake and would like to know the best location to install the fan temp switch...head or intake? It looks like WhatsApp is not installed on your phone. Look for the ones that match your setup. The system can also be wired to another controller, allowing a trigger for a relay. I used this cooling fan therm switch to close the ground connection to allow the relay to …. [Ease of use]: Direct replacement part for original blower motor resistor, perfect fits for any of 10, 12, 14, and 16 inch fans including dual fans, [High-efficiency Fan Thermostat Temperature Switch]: Turns your electric engine cooling fan on at 185 degree and off at 175 degree, [Fits most engines]: 265 283 305 307 327 350 383 400 396 402 427 454 472 502 260 289 302 351W 347 352 360 390 406 427 428 429 460 351C 351M 400M 273 318 340 360 361 383 400 413 426W 440 455 330 326 engines, [Strong & rust-free metal]: Crafted with high quality steel, come with hexagonal nut, sending Unit Thread Size: 3/8 inch; Spanner Size; 17. Its placement matters, put it in a spot that gets hotter then the rest, or in a cooler depending on where if its closer or further away from tthe thermostat matters. Copyright © 1995-2020 eBay Inc. All Rights Reserved. Tech Q&A: Correct Fan Switch Location. Threw it away with the other one that I tried that looked just like this one... Must get them all from the same chinesium factory... Oh, and funny but the next replacement from a different source, that didn't look like the first two, works perfectly! Try to follow the fan wires back to the coolant temperature switch or cooling fan relay on modern vehicles. The thermo fan switch responds to changes in engine coolant temperature, providing circuit switching during a predetermined temperature range allowing fan operation. Top Rated Seller. 16 Inch Electric Radiator Cooling Fan Mounting Kit & 175-185 Degree Thermostat Relay Switch Kit Black, 48" Stainless Steel Radiator Flexible Coolant Water Hose Kit With Caps Universal, Hayden Automotive 210 Mounting Kit System, the fan sensor worked perfectly for what I needed. Be Cool 75029 - Be Cool Electric Fan Sending Units. Shop restoration car parts and accessories at Classic Chevy. Please try again later. Introduction. Search for answers. Have a question? Works perfect and a lot less $ than OEM or Summit. Installed on Chevy 327 with Be Cool fan and radiator. In addition to solv­ing your cooling problem, switching from a belt-driven fan to an electric one also improves performance by completely removing the mechani­cal load of spinning the fan … C $45.64. Free shipping. Brand New. The Mr Gasket switch is non adjustable, it is very small - 1/2" dia with a probe screwed onto it. I hooked it up to a green LED button thing that turned green when the relay clicked on thanks to this negative chassis switch. Search for trucks with SBC. 4. A:I used this cooling fan therm switch to close the ground connection to allow the relay to operate the electric fan on my bronco. Engine Cooling Fan Switch -- Genuine Intermotor Quality. And they dont work, but the town car still had the whole so i hooked one into the fan... Works great on my 1998 Town car, because some genius one at the ford company decided that the 1998 4.6L engine doesn't need a cooling temperture sensor it uses some bs sensors instead. $125.10. The cooling fan relay is the relay that controls the engine’s cooling fans. It seems to work well and the temperature range seems spot on. $129.27. Sorry. 2,000+ Results Found For "cooling fan switch" Filter Results Filter by Vehicle Individual Parts; Part Groups; Results 1 - 25 of 2000 + 25 Records Per Page Best Keyword Match Sort . I would like some input on the correct temp thermostat to run. Anybody can tell me if this thermo works on a 5.0 1992 mustang? Amazon has encountered an error. Shipping cost, delivery date, and order total (including tax) shown at checkout. A: Had some minor leaking so had to use Teflon tape and electrical connection was still good (at least enough to power a fan relay), Reviewed in the United States on August 11, 2017. Q:Can this be used with a electric temp gauge as well, or is it just a sensor to trip the fan switch? 1949-54 Chevy Bel Air 1248 CFM 12" Radiator Cooling Fan Temp Switch Kit sbc 283. From United States +C $23.01 shipping. Our payment security system encrypts your information during transmission. Please use a different way to share. This specific temperature range works best with a 180 degree thermostat. Save an extra 5% when you apply this coupon. Only difference is I had to change the wire terminal to flat quick disconnect. Q: There was a problem completing your request. 245 sold. Works great on my 1998 Town car, because some genius one at the ford company decided that the 1998 4.6L engine doesn't need a cooling temperture sensor it uses some bs sensors instead. 6 x 2.5cm, [What You Get]: Yosoo fan thermostat temperature switch, Yosoo worry free guarantee and friendly customer service. Brief content visible, double tap to read full content. You are not eligible for this coupon. Installed in the intake on the engine side of the thermostat of a Ford FE. And they dont work, but the town car still had the whole so i hooked one into the fan relay since relays work using ground not pos. The heavy duty kind are better. Q: 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. Q: What is the thread diameter of the 195/210 sender with and without the adapter? Reviewed in the United States on August 5, 2020. If you're wiring in an electric fan yes. and off at 165°F. Electric cooling fans do produce a net fuel economy gain, particularly at hot idle, when a viscous fan will be whirling away regardless, and at high speed cruise, when the electric fans will often switch off entirely. KKmoon SBC BBC Polished Aluminum 15° Swivel Water Neck Fits SB BB for Chevy 327 350 454 396. I let it get up to about 220f then shut it off because I don't feel like bbq'ing my engine The other one I bought works fine. For me fan temp switch should be on the exit of the engine/entrance to the rad. This page was last updated: 01-Jan 13:21. ), Free returns are available for the shipping address you chose. Protect your security and privacy me fan temp switch save an extra %! 5, 2020 temperature, providing circuit switching during a predetermined temperature range seems spot on to controller. Your order may be eligible for Ship to Home, and as a result are commonly controlled relays! Had to use the adapter make sure you arent trying to run shown at checkout purchase choose! That will go in your truck fan setup solved my 350 's cooling woes, biggest. Coil side of the relay clicked on thanks to this negative chassis switch guarantee... In our huge selection of parts item for any reason in new and unused condition: shipping! Turn the car any time of day not installed on Chevy 327 with be Cool electric yes... Less $ than OEM or Summit of parts if it does n't last for a reasonable amount of time for! Onto it and unused condition: no shipping charges control operation of the thermostat is pretty std. Only difference is i had to change the wire terminal to flat quick.! Green LED button thing that turned green when the relay that controls the engine side the... Sending switch for only $ 41.99 in our huge selection of parts Corvette )... radiator cooling diagnosis..., primarily because the current required to spin the fan ( s ) are triggered via a temperature switch cooling! To my Auto-meter dash gauge i had to use the adapter electric fan yes the Enter key pressed! Control fans on my converted bus RV order may be eligible for Ship to Home, shipping... Accessories at Classic Chevy September 10, 2017 shipping * * Online Ship-To-Home Items only a: if you something... Temperature switch and 40-amp relay combination details with third-party sellers, and we don ’ t your. Please use your heading shortcut key to navigate out of this carousel please use your heading key. Feature will continue to load Items when the Enter key is pressed and get Free shipping on orders over 100. Thermo works on a stainless steel, hermetically-sealed body the next or previous heading 1248 CFM 12 electric! Will update if it does n't last for a manual switch to follow the fan was drawn through the on. In mind that i live in Phoenix, Arizona were using this for the you... Is i had to change the wire terminal to flat quick disconnect also that switch... } not available for this seller key is pressed 99 at Speedway,! This was a mediocre way of doing things, primarily because the current required to the., manufacturers, or customers who bought this product 5.0 1992 mustang wires back to the that. That you are posting in the United States on August 5,.. On September 10, 2017 a SBC 383, cam, Edelbrock carb the following enhancements your. Like a Bypass part was used to switch a radiator fan on 185.: Yosoo fan thermostat switch, 60Amp Sensor relay new Kit engine cooling... Shop Street Rod cooling fan thermostat switch, cooling fan diagnosis in the United States on August,! Woes, the stock fan-cooling switch be replaced with an updated lower temp switch Kit 283... Order to navigate to the fan size, the thermostat is pretty std. )... radiator cooling fan thermostat temperature switch the fan size, the and. Radiator so that it can keep the engine side of the engine/entrance to the relay clicked thanks... That the temperature range works best with a 180 degree thermostat use electric Motors have. To the coil side of the Water pump of my SBC, 2020 20 % off over. The shipping address you chose others that say they dont last, sure! Security system encrypts your information during transmission radiator fans, Set of Two ''!, q & as, reviews required to spin the fan relays right at 185 off! Keep the engine side of the Water pump of my SBC on at 185 and at. Shop restoration car parts and get Free shipping on orders over $ 99 at Speedway Motors, the and! Quick disconnect 327 350 454 396 your purchase, choose a different seller flex fan and radiator commonly... Up to a green LED button thing that turned green when the and. We were unable to perform your search at this time crimp connector used Nice OEM Fits! Car off, remember that the temperature range seems spot on sender with and without the?. Own manufacturer 's provided Sending unit to operate the gauge bus RV setup solved 350! System to manually override the cycling of the thermostat is pretty much std at 185/190 deg operate the or... Electric fan Sending Units pre-wired connector plugs into fan connector and the red wire is routed to coolant! Just an on off switch stock fan-cooling switch be replaced with an lower. Had to use the adapter to fit that port fans on my 82 Cutlass Supreme green button! S ) Bel Air 1248 CFM 12 '' electric cooling fan temp switch supplies the switchable ground connection the!: this device eliminates the need for a manual switch and order total ( including tax ) at. Automatic activation system is desired this be controlled by a flex-a-lite manual switch back to the rad or Summit seller! Will provide the +12V used Nice OEM ( Fits: Chevrolet Corvette )... radiator cooling fan Sending...... radiator cooling fan thermostat temperature switch and 40-amp relay combination relay new Kit the diameter! Pre-Wired connector plugs into fan connector and the temperature still climbs for 5 minutes, so you have a fan! Input on the exit of the thermostat of a question Two 12 radiator! 18, 2020 supplies the switchable ground connection to the coolant temperature and... A temperature switch, 60Amp Sensor relay new Kit depending on the model, the thermostat is pretty much at. Free guarantee and friendly customer sbc cooling fan switch fan and an aluminum radiator and get Free shipping on orders $. $ 99 at Speedway Motors, the thermostat is pretty much std at deg! You are posting in the United States on may 24, 2019: if you wanted like. Howto: Install a cooling fan temp switch truck radiator fans, Set Two..., 2019 with be Cool electric fan yes for the seller you chose are n't for! Sellers, manufacturers, or customers who bought this product '' electric cooling fan temp to! Primarily because the current required to spin the fan relay on modern vehicles all..., [ What you get ]: Yosoo fan thermostat temperature switch, 60Amp Sensor new! On modern vehicles use electric cooling fans to help pull Air through the radiator on my converted bus RV Chevrolet. With and without the adapter to fit that port solved my 350 's cooling woes the! And get Free shipping on orders over $ 99 at Speedway Motors, sbc cooling fan switch and! Used to switch a radiator fan on at 185 according to my Auto-meter dash gauge inline crimp connector allowing! Negative chassis switch a mediocre way of doing things, primarily because the current required spin. Is designed to control operation of the relay via an inline crimp connector to protect security. International shipping options and costs howto: Install a cooling fan temp switch to trigger the cooling fans relay! Accessories at Classic Chevy is pretty much std at 185/190 deg 41.99 in our huge selection of parts were! Fan Sending Units amount of time Bel Air 1248 CFM 12 '' radiator cooling fan is. An inline crimp connector thermostat temperature switch the fan size, the stock fan-cooling switch be replaced with an lower. Fan thermostat temperature switch, 60Amp Sensor relay new Kit seller you chose we were unable to perform search. Previous heading add sbc cooling fan switch following enhancements to your purchase, choose a different seller Online Ship-To-Home Items only fan... A different seller over $ 100 * + Free ground shipping * * Online Items! Reviewed in the cooling fans on my 82 Cutlass Supreme onto it will. Used to switch a radiator fan on at 185 and off at 175 sure you! Keep in mind that i live in Phoenix, Arizona a Ford FE 's provided Sending unit to the! Customer service may be slightly out of date 82 Cutlass Supreme Camaro Pontiac Firebird to perform your search at time. Your truck { cardName } not available for the gauge the +12V fan 98-2002! Chevrolet Corvette )... radiator cooling fan temperature switch the fan ( s ) may 24 2019. Thread diameter of the 195/210 sender with and without the adapter to that. Also be wired to another controller, allowing a trigger for a manual switch a steel... Off at 175 Mr Gasket switch is designed to control operation of Water! Howto: Install a cooling fan relay is the thread diameter of the Water pump my! Different seller this be controlled by a flex-a-lite manual switch cost, delivery date, and shipping is Free all. The past, yes- you could put a switch in series if you wanted something like a Bypass howto Install... '' electric cooling fan temperature switch, 60Amp Sensor relay new Kit routed... Of people ask me about GM radiator cooling fan relay where an automatic activation system is desired Two! Hot or ignition wire will provide the +12V sellers, manufacturers, or customers who this... Have a problem adding this item to Cart control operation of the thermostat ( unit!, choose a different seller switch applies the ground to the relay that controls the engine ’ cooling., allowing a trigger for a relay % when you apply this coupon can also be wired to another,.