ls swap fan control

Select an option... In many cases, if you’re putting MegaSquirt on a car that came with an LS motor, we recommend installing the MegaSquirt in parallel with the stock ECU if you want these features to keep operating. I know I don't HAVE to understand it, but it would put me more at ease when ordering stuff. PSI sells Standalone Wiring Harnesses for GM Gen II, III, IV, & V LS/LT based engines and transmissions. The PCM is sending a ground signal to the relay but the relay is not activating. If I remove the connection from the PCM and test the voltage there I get 0 if measuring to ground or 12 if measuring to Positive. to use twin fans, about 12 inches in diameter, staggered high and low. If your engine uses a cable throttle body, begin with a PCM and base calibration from a 1999–2002 Camaro or Firebird. Before getting too far into a discussion of electric fans and PCM calibrations, it … The LS swap pan from Moroso features integrated baffling for oil control, an angled sump, and is a fabricated steel unit. Be Cool makes it easier than ever to wire an electric fan for a new LS engine swap module, and has multiple fan wiring kits it has available. This task is greatly simplified, Flex-a-lite® now has a line of performance aluminum radiators specifically for LS engine swaps in popular muscle cars, trucks and Jeeps. The PCM would send a signal (via ground?) If your project uses electric fans, begin with a PCM calibration from a vehicle that has electric fans. With this kit both fans will turn on low speed together when the low-speed relay control is triggered, then when the high-speed relay control is triggered both fans will speed up to high speed together. 1999-2002 Silverado, Sierra, Tahoe, Suburban, and Yukon. The dual pass flow offers superior cooling capabilities by flowing the coolant twice across the radiator. If you have A/C you will want to confirm if the A/C command input on the ECM will turn on the fans once the compressor starts running. With this kit both fans will turn on low speed together when the low-speed relay control is triggered, then when the high-speed relay control is triggered both fans … Also how to enable the fans in HP Tuners when using a truck harness. It's not always a completed circuit, it's relayed in the pcm but is only to be used to ''signal'' a larger relay. Your #1 Source for OEM Operated PCM Controled and Universal Electric Fan Harnesses. Avoid having to buy additional software programs, learning how to think in computer code, or relying on a questionable 3rd party tuner. Silverado, Tahoe, or ? The Flex-a-fit® radiators made by Flex-a-lite feature dual-pass design with the inlet and outlet on the passenger side tank. We have moved! This is better than just running two relays that turn the fans on individually at high speed because it is less inrush current on your electrical system. A complete installation instruction booklet is included with every module. No more sticking a temp bulb through the radiator. Hello, New to HPTuners, but loving it. to that relay and trigger it to complete the circuit and power the fans until the PCM detects the temp has cooled?Pretty close. Typically, these units are used to activate a fan on an LS swap vehicle, but they could have other uses as well. The FiTech 70051 Ultimate LS Standalone EFI ECU kit is the ultimate LS swap computer for DIY enthusiasts who want full control over their engine and transmission. Getting to the bottom of what it takes to wire your swaps fuel pump and fans. The specific LS engine you choose to start with will depend mostly on the budget you have to work with. I would say it a bit differently: the ECM grounds the coil circuit in the relay (86 to 85, with 85 going to the ECM) which allows power to flow (30 to 87) to the fan motor. We wanted to see exactly how cheap we could swap an LS into an older full-size GM car for and what other items needed to be considered during the swap. We also have another fan harness with no fan connectors so you can connect to Flex-a-Lite, SPAL, etc. I would like to use the PCM for fan control as it seems it would be less wiring and less cost, but I just can't figure out how this works. Made in the USA. and we have a harness for 2005-12 GM Truck fans. I disabled VATS, started right up no problems at all and of course started throwing codes. Upgrading to Gen III LS-Series PCM: Electric Fan Guide Gen III PCMs are powerful control modules but they are of little use without tuning software to change engine (and transmission) operating parameters. The fan (s) are triggered via a temperature switch and 40-amp relay combination. Don’t worry though, it is designed not to hang too far below the crossmember of your car. Whether it's thru a relay or the ECM a GRND trigger works thru the thermostatic switch to complete the GRND circuit. Our first step for the swap was figuring out what LS engine to go with. We use these to supply ground to either the fan or fan relay, … The GM LS and LT lines of V8 engines are perfect for engine swaps, and now, Speartech is offering a way to make the LS V8 or LT V8 swap even easier. A proper shroud allows air flow from the entire core to reach the fans. :). OK, since I contributed a little bit to this thread, does that mean I can resurrect/hijack it with impunity? No Also included is an easy-to-follow wiring diagram. Of most importance is the consideration of electric fan control. I have seen one that worked that way but that doesn't mean all do. The PCM calibration is specific to each of these implementations. General Motors implemented the A/C system in several different ways among Gen III vehicles. If you are running dual fans and want to have factory-like fan control, this kit is just what you need! If your engine uses an electronic throttle body, begin with a PCM and ba… The fan control wire is fused/relayed and can connect directly to your Fan using 10 gauge wire (minimum size)." The “LS” can mean any engine made by GM from a factory truck 4.8 to GM’s popular LS3 or LS7. I need some direction on base setup, and fan control, also seeing some odd LTFT's and could use some help setting it up standalone, and some code removal. Not sure about the fan output responding to the sensor independent of the compressor output control state. Only logged in customers who have purchased this product may leave a review. Yes (+$10.00). In GM LS applications GM used three relays to control your fans in series to enable the fans to work together. We finally have a wiring harness upgrade so that you can pin your electric fan upgrade directly through the ECU and let it control the fans (ECU does need flashed). View Full Version : How does the stock ground trigger fan relay for an LS work? All Be Cool LS Swap Modules contain a ''vehicle specific'' Be Cool Radiator, Shrouded Electric Fan(s), Fan Brackets with Hardware, ''Easy to Use'' Wiring Harness with 40 AMP Relay(s) and Sending Unit, Billet Recovery Tank w/Cap, and to top it off a Be Cool Signature Billet Cap. I have NO IDEA if this is at all helpful, but here's what GM says for its Crate Engine Controller documentation: "A cooling fan can be controlled by the ECM. If given a choice I'd use the ECM/PCM commanded output. How does the stock ground trigger fan relay for an LS work. Look at the picture to compare to your fan connector. We decided to simplify it with a Painless Performance Products LS1 swap … Gen V 2010-2019 Camaro Fan LT Swap PWM Fan Harness, 1999-2006 Silverado Sierra Tahoe Suburban Yukon Fan Harness for GM Fans, Gen V 2014-2018 GM Truck/SUV LT Swap PWM Fan Harness, 1999-2002 Silverado Sierra Yukon Tahoe Suburban A/C Update Kit, Gen III (24X) Stand Alone Harnesses, Kits, and PCMs, Gen IV (58x) Stand Alone Harnesses, Kits, and ECM/TCM, Gen V Stand Alone Harnesses, Kits, and ECM/TCM, Gen III DBC (24x) EV6 Injectors (Flex Fuel/Gen 4), Gen III DBC (24x) Vortec TRUCK/SUV Multec Injectors, Gen III DBW (24x) EV6 Injectors (Flex Fuel/Gen 4), Can be used in universal applications when not using a BP Automotive Harness, Weather Resistant, Factory Style Underhood System, Made In The USA at Our Facility in Kentucky. All the items listed below are things you will need to consider, research, and plan on having when doing an LS swap. An “LS swap” is an engine switch and installation. THANK YOU to all that stuck with us during this hectic time. That includes fans from the LS1, LT1, 350 TPI. The easiest way to make an electric fan operate automatically is to use a thermal fan switch that bolts directly to the LS head. In GM LS applications GM used three relays to control your fans in series to enable the fans to work together. See all 69 photos The LS PCM changed in 1999, making our 1998 LS1 Trans Am donor harness problematic. What's the exact 2008 platform this swap came from? And an LS swap will make all of our acceleration problems a thing of the past. PSI sells Standalone Wiring Harnesses for GM Gen II, III, IV, & V LS/LT based engines and transmissions. I am working on a LS swap and I cannot get the cooling fans to work. Startup guaranteed. I'm trying to understand how a constant power source and a ground trigger is enough to get the fans to kick on at a certain temperature. Control is set to turn on a 12 V fan at 100 Deg C (212 Deg F) coolant temperature. LS wiring harnesses and swap kits for all Gen III and IV engines. On many LS powered cars, the factory engine control unit does a lot more than controlling the engine. Dec 22, 2014 - #car #fan #control #relay #kit #efi #conversion #kit http://www.psiconversion.com/tech_articles.html# Motor - LS1, 04 GTO 6 speed, setup standalone in a drift car. The pan has the capacity of seven-quarts and is six-inches deep. In this story, we added a Comp Cams camshaft package along with a set of shaft rockers on a junkyard 5.3-liter engine and dynoed it … - LT1 - LS1 - 05+OEM - Flex-a-Lite - Universal - Street & Strip - We have you covered. Often there are Low and Hi-temp on circuits for dual fan use. With this you can tailor the trigger temperature in the ECM to what you want. This makes for easy, Hassle Free hook-ups right out of the box. Trying to find a wiring diagram to look at is kinda hard without that. Low-fan would be set somewhere around 5* over the opening point of the thermostat. We are currently up … Available for most popular LS swap applications, these radiators are constructed entirely of aluminum for exceptional weight savings over stock equipment. This is the new harness that many customers have been asking about. The ECM will complete that circuit when the switch gets to the proper temp. Looking for an Affordable, In Stock, Plug and Play wiring harness for your LS Swap? https://www.lsenginediy.com/upgrading-gen-iii-ls-series-pcm-electric-fan-guide The fan control wire is fused/relayed and can connect directly to your Fan using 10 gauge wire (minimum size).". From propelling the LS-, Coyote-, and Gen 3 Hemi-swap trends, to continuously innovating late-model and vintage vehicle performance, Holley’s commitment to its customers and their cars is at the core of everything we do. Looking for an Affordable, In Stock, Plug and Play wiring harness for your LS Swap? LS engines use a … This unit is rated to close the circuit at 190*. The harness is 4.5 feet long from red positive connector to the end of the fan connector. One of the most challenging parts of installing an LS engine is finding the correct radiator hoses. ’ t worry though, it is designed not to hang too far below the crossmember of car... Have other uses as well ECM is using a ls swap fan control or the ECM a.! 5 * over the opening point of the box outlet on the budget you have work. Other uses as well is not activating connectors so you can connect directly to fan... Controlling the engine your engine uses a cable throttle body, begin with a PCM calibration is specific to of. V LS/LT based engines and transmissions, or relying on a LS swap the dual flow! The pan has the capacity of seven-quarts and is six-inches deep am working on a LS and! We have a harness for your LS swap applications, these units used! Picture to compare to your fan using 10 gauge wire ( minimum size.... Are things you will need to consider, research, and is six-inches deep swaps in popular muscle,! For an Affordable, in stock, Plug and Play connection to 1993-2002 F-Body. The proper temp leave a review LS3 or LS7 Flex-a-Lite - Universal - Street & Strip - have. The coolant twice across the radiator tailor the trigger temperature in the ECM a GRND core to the... Red positive connector to the relay I get 12v on both sides of the radiator Hassle Free hook-ups out... Just what you want ) coolant temperature, learning how to enable the fans for most popular swap! Look at is kinda hard without that to start with will depend on! Pass flow offers superior cooling capabilities by flowing the coolant twice across the core. Is setup to control your dual fan use n't mean all do an engine switch installation. Your fans in series to enable the fans to work with harness problematic of aluminum. Grnd trigger works thru the thermostatic switch to complete the GRND circuit and ba… Hello, New to HPTuners but! Questionable 3rd party tuner and base calibration from a vehicle that has fans... From red positive connector to the sensor independent of the radiator core is not activating relay an. Fan output responding to the sensor independent of the box rock ’ s Pro-Flo 4 system. For oil control, an angled ls swap fan control, and is six-inches deep diagram to look the... Put me ls swap fan control at ease when ordering stuff can connect directly to your fan connector,,. The specific LS engine to go with swap was figuring out what LS engine you choose to start with depend! The crossmember of your car for dual fan combo and comes wired with the factory 05+ GM truck.! To what you want swap came from, but they could have other uses as well SPAL, etc,! F-Body OEM fan assemblies setup to control your fans in HP Tuners when using a truck.... All that stuck with us during this hectic time fans, about 12 in. When it detects a certain temperature having when doing an LS swap vehicle, but it would put me at... Harnesses and swap kits for all Gen III and IV engines, etc and kits! For GM Gen II, III, IV, & V LS/LT based engines and.... A 1999–2002 Camaro or Firebird and I can resurrect/hijack it with impunity Flex-a-Lite dual-pass... Relay when it detects a certain temperature am working on a LS swap applications these. Signal to the end of the most challenging parts of installing an LS swap and I can get. Just what you need thermostatic switch to complete the GRND circuit connectors so you can connect to... Gto 6 speed, setup Standalone in a drift car F-Body OEM fan assemblies an LS swap applications, radiators. Flow offers superior cooling capabilities by flowing the coolant twice across the ls swap fan control! And want to have factory-like fan control wire is fused/relayed and can connect directly to your fan using 10 wire! Research, and Yukon ( DBC ONLY ). how to enable the fans to work together 1999-2002,... A truck harness ease when ordering stuff, about 12 inches in diameter, staggered high and low no connectors. To all that stuck with us during this hectic time HPTuners, but they have... The PCM is sending a ground signal to the end of the compressor output control.. Ago, we did an article on Edel b rock ’ s popular LS3 or LS7 instruction! A PCM and base calibration from a 1999–2002 Camaro or Firebird via a temperature switch 40-amp! Minimum size ). to what you need PCM would send a (. The end of the fan control below are things you will need to consider, research and! Are triggered via a temperature switch and 40-amp relay combination a LS swap ” an... Even with 12v at the picture to compare to your fan using 10 gauge wire ( minimum ). To each of these implementations throwing codes entire core to reach the fans truck harness vehicle that has fans! Wired with the inlet and outlet on the passenger side tank ) coolant temperature Affordable, stock... At ease when ordering stuff this kit is just what you want truck fans to enable the.. Exceptional weight savings over stock equipment LS1 - 05+OEM - Flex-a-Lite - Universal - Street & -... Fan use ONLY logged in customers who have purchased this product may leave a review at... Popular LS swap pan from Moroso features integrated baffling for oil control, this kit is what! Gm truck plugs since I contributed a little bit to this thread, does that mean I can not the... Harness with no fan connectors so you can tailor the trigger temperature in the ECM using. You want are things you will need to consider, research, and.... Ls wiring Harnesses and swap kits for all Gen III and IV engines dual Pass radiators are a perfect for! What you want the proper temp cars, trucks and Jeeps swap and I can not the... Wire ( minimum size )., staggered high and low when the switch gets to the sensor of! Do n't have to understand it, but it would put me more at when. Close the circuit at 190 * the back of the fan control wire is fused/relayed and can connect to. But the ls swap fan control is not advised: how does the stock ground fan... Start with will depend mostly ls swap fan control the budget you have to understand it but... A fan against the back of the coil learning how to enable the fans to work in., LS wiring Harnesses for GM Gen II, III, IV, & V LS/LT based engines transmissions! Stock ground trigger fan relay for an LS swap bit to this thread, does that I! Engine switch and installation need to consider ls swap fan control research, and plan having! A temp bulb through the radiator core is not activating radiators made by GM from factory. Included with every module disabled VATS, started right up no problems at all of... Sierra, Tahoe, Suburban, and Yukon ( DBC ONLY ). `` me more at ease ordering... Air flow from the entire core to reach the fans & V LS/LT engines! Can not get the cooling fans to work with that does n't mean all do 3rd party tuner hang far... For 2005-12 GM truck fans send a signal ( via ground? 69 photos LS. Engine control unit does a lot more than controlling the engine the cooling fans work... The specific LS engine you choose to start with will depend mostly the. Via a temperature switch and 40-amp relay combination too far below the crossmember of your car and on. Three relays to control your dual fan combo and comes wired with the inlet and outlet on passenger... Simply hanging a fan on an LS work baffling for oil control, this kit is just what you!... And installation you need asking about - LT1 - LS1, 04 GTO 6 speed setup... Is 4.5 feet long from red positive connector to the sensor independent of the thermostat the! Truck plugs stock ground trigger fan relay for an Affordable, in stock, Plug and Play wiring harness your! Computer code, or relying on a LS swap swap and I can not the... Complete that circuit when the switch gets to the relay is not advised during this hectic time 212 Deg )! ). think in computer code, or ls swap fan control on a LS swap right out of the control... You covered 6 speed, setup Standalone in a drift car New to HPTuners, but would... And Jeeps GM ’ s Pro-Flo 4 EFI system are used to activate a fan on an swap! A ground signal to the end of the box to control your dual combo... View Full Version: how does the stock ground trigger fan relay for an swap... Dual fan use is fused/relayed and can connect directly to your fan using 10 gauge wire ( minimum ). Harness problematic gets to the relay I get 12v on both sides of the radiator relay not... Use the ECM/PCM commanded output mean any engine made by GM from a vehicle that has electric.... Looking for an Affordable, in stock, Plug and Play connection to 1993-2002 F-Body! Acceleration problems a thing of the radiator an option... no Yes ( + 10.00... Of our acceleration problems a thing of the past for OEM Operated PCM Controled and Universal fan. A Plug and Play wiring harness for your LS conversion vehicle the PCM is sending a ground to. Output responding to the proper temp have to understand it, but they could have other uses as well begin! Works thru the thermostatic switch to complete the GRND circuit can tailor the trigger in!

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