Ls swap electric fan controller Aug 19, 2021 · Learn how to wire dual electric radiator fans. For a E38 good choices would be 2010-15 camaro or a lot of trucks come with Efans and have E38's. This uses the plastic fan assembly from a 1998-2002 Camaro/Firebird V8. Is there any specific wiring that I have PCM of NC 1999-2002 Full Size Truck Dual Fan Conversion Kit - factory looking harness adds electric fans to your truck! Computer controlled. Running a fan that draws higher than 30 amps? This electric fan add-on module will control 2 fans in series to power both fans at half speed first, then full speed second. Of most importance is the consideration of electric fan control. I have a Simple and easy to install, this module will make installing a set of electric fans on your Gen V Engine swap a breeze and get you cooling in no time. I'm trying to get my fans working using a C6 PWM fan controller. Hopefully it will help one of you down the line when/if you need to control electric fans when the A/C is commanded on. The time now is 03:56 PM. All my connections to existing wires are connected through to terminals in the fuse box. I am working on a LS swap and I cannot get the cooling fans to work. Yep, that's why I use the LS 4th gen fans on all my swaps. The older 2 relay system, had a primary fan and a secondary fan that turned on later. It runs on low speed when the minimum coolant temperature is reached and ramps up as temp increases or if triggered by the AC Website filled with info for swaping GM LT1/LS1/Vortec Truck 4. It is strongly recommended that you use a Derale Thermoswitch DER-16731 with an ICT Billet M28 to 1/8NPT adapter installed in the engine block to control your Fan (s). Aug 15, 2023 · Will the factory LS mechanical fans fit in the a-bodies anybody know? I seem to remeber them not fitting for some reason. C1 & C2 Corvettes - LS3 ECM to Electric Cooling Fan questionmodified folks - Guys I have this question on the LS1 tech Forum but they're not very good at answering like you fellas are. Would anyone have insight about this? 2002 Chevy 1500 Aug 27, 2025 · LT1 LS1 Swap Adjustable Temp Electric Fan Controller w/ 3/8" NPT Sensor PROFORM Nook and Tranny LLC (58697) 99. I've recently completed an LS Swap on my 89 Grand Wagoneer. 0 engine and others into about anything! PCM programming, wiring harness help Sep 6, 2020 · Just purchased a radiator and cooling fan from universal parts inc. 8) swapped, has efans. Is there any specific wiring that I have I did the electric fan conversion on my 2001 silverado with 4. What settings do I need to use to enable electric fans through a relay? Transplanted a 2013 LM9 into a 1980 Cadillac. I've been reading 'How to Use and Upgrade to GM Gen III LS-Series Powertrain Control Systems' by Mike Noonan that was published in 2013 (Source 1 ) (source 2 ) "GM trucks were fitted with a mechanical fan until 2005 so those PCM calibrations do not have provision for electric fan control with A/C on. LS Swap Electric Fans - Standalone Wiring Harness that is better than free. I'm nearing completion of my LS swap into my '69 Chevelle, and I'm finishing up the last few bits of wiring. 0 engine and others into about anything! PCM programming, wiring harness help Apr 22, 2023 · I’m in the process of collecting parts for the swap. Pentastar fan upgrade for JK LS swaps. This is all so the PCM can anticipate the added load, placing the idle air control valve or throttle blade on electric throttle engines, in the proper position as the load comes on. What? Yes pulse width modulation WTH I recently acquired a 79 C10 with an LS1 from a 2001-2004 corvette and a p01 pcm from a 2002 Escalade. Right now they are just coolant temp activated. 3's LSX Conversions A trinary switch on the high side is the easy way to run fan 2 without a pressure sensor. APPLICATION: 2006 + LS, Vortec and LT engines PARTS INCLUDED: Electronic fan controller 70 Amp with Bluetooth controller, BIM cable, 70 amp relay w/ socket, instructions. Most PWM controllers do not require IGN, but I'd rather have it and not need it than have to pull another wire in the end Stock torque request/del conenctor for ABS. My LS Wiring harness is out of a 2004 Chevy Silverado. Jan 15, 2021 · Amazon. Our second kit is our SPAL fan kit. I have a few all aluminum rads from Mar 4, 2020 · They are the . Feb 15, 2015 · While electric fan control can be enabled for calibrations from trucks with a mechanical fan, the operation of electric fans when the air conditioning is on requires extra wiring work and disabling of the fan-controlled DTCs. Jul 16, 2011 · Where is the temperature switch that controls the activation of the cooling fans. not sure if it would be better to have the dual unit so one fan comes on at low temp and 2nd fan with the higher temp, or just run a single fan control with probe unit and just hookup a relay to power the second fan. This is a super easy process and should only take a few mins! With that being said this is a very important step that you MUST do if Jun 29, 2011 · This is a step-by-step tutorial on how to upgrade any 99-02 GMT800 truck or SUV to the 05-06 GMT800 electric cooling fans. Cannot get fans to come on. Everything on truck works as it should, only issue is getting efans to work with ac. ECU: 2001 GMC Yukon 1500 5. The ECU is an E38 set up for a 2015 Z28 LS7. 3… Connect ground triggered relay control wires Connect power output wires to fans Connect Battery wire to positive battery post Dual Fan Relay Kit Module Includes: Sealed Fuse The idle control is also very complex, with tables in the PCM telling it the amount of air needed for a particular idle speed and operating temperature. Trinary and 3 relay electric fan questions LSx Swaps Mar 25, 2024 · We opted to install the engine oil cooler in the same location, on the opposite side of the car. Choose the corresponding folder, right click and save the appropriate file. The kit includes a high quality sealed 40 amp relay, a sealed fuse holder with included fuse, a sealed fan connector, and a second connector, and terminals to install on your fan if the kit doesn't plug directly into your fans. pdf files. My understanding is the 4. [Replace OE]: 674-00923. I have read that pre-2007 trucks (assuming 2007+ use variable fan speed control) have two output pins (pin 33 and 42) that control two electric fans. Jun 21, 2017 · Relays #2 & 3 control the speed of the fans as the 3 relay system has both fans working at all times when they are on. I plan to eventually swap that over to PWM control, which the E67 ECU can do, just with a bit of wiring changes and tuning. Me un knowing thought hay ya just need a couple of relays to fire the fans from the ecu signal and your good to go. I have been googling to find a way to connect up a dual fan/2 speed setup similar to what was used on Gen 4 Camaro setups. Relays are used to turn the fan on based on temperature or air conditioning activation. 3 GM_P01 I installed a Sanden SD5H09 A/C compressor and wired it like this: 140080 So you have 12V through the ac low pressure switch ( as soon I set the lever on the dash on A/C ) feeding de relay ( red circle ) and this signal goes also to pin 17 of the ecu ( ac request signal Jun 19, 2022 · All times are GMT -4. The question is on the cooling fan wiring. 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. The stock PCM didn't have the fan IC installed like later model mustangs. NOTES: The PAC-2800BT was designed for the ultimate in flexibility and to be a simple add-on in any application using an electric fan. Ive obviously either did use the correct settings or my sensor Fan control and operation can only be guaranteed if using PAC-2800BT. I have a fan 1 ( low speed) and fan 2 This is the best Chevy Truck Electric Fan Conversion Kit on the market today! This kit includes a custom built aluminum shroud (specifically for radiators with a 34" core measurement), two 16" SPAL fans, one Davies Craig #0444 dual fan controller, all mounted as one unit on the shroud ready to wire into your vehicle. Use our dual fan wiring diagram and guide to make sure you properly wire your fans to your thermostat. Jan 24, 2014 · When that happens, the fan still spins providing the cooling effect until you fix it. Most popular is usually the 160*F. I tried copying over all the fan settings from one of the C6 cars I used to own, but the fans do not operate. Here's some pics; I think most of the hate comes from people using the wrong fan. Sep 19, 2019 · AC and Fan strategy - From what I understand I cannot use the E67 ECM to control the AC compressor and fans together because I do not have any data link from a Body Control Module so I need another strategy. All wires and terminals have been quality checked at the factory to ensure continuity of all terminals and heat Aug 13, 2021 · My manual fan is extremely loud and seems to waste performance cooling my engine. Starting with a 1998 2. This fan will move a lot more air compared to the stock 3. May 17, 2025 · Wiring an electric fan for an LS swap involves connecting it to a power source, a ground, and a control signal. In this Video Matt from the PSI Team will walk you through the process for wiring for your fan relay ( KIT-1010 ) for your LS Swap. Dual Electric Radiator Fan Conversions Harnesses and parts for GM Trucks and SUV's. If i change fan type to discrete the fan runs all the time. Mar 31, 2025 · This custom aluminum radiator is designed to drop into your FJ4X factory mounting location. I know LMC makes two types of kits for this, one is a basic single fan design while the other is a dual fan design. Fan control and operation can only be guaranteed if using PAC-2800BT. Makes the installation of electric fans easy as 1. They have controllers that are adjustable and easy to wire up too. We get the low down from Be Cool on how to choose the correct radiator and fan module for a LS Swap. When you are rolling down the road the condenser has enough air flow that the fan turns off. Make the installation of electric fans easy as 1. Silverado Sierra Denali Yukon Suburban Tahoe Cadillac Escalade Mar 12, 2019 · Figured since I have tried both with success, I would post a brief overview and review/comparison of these cooling fan options for anyone looking for something bigger than stock. No change other than ECM pin locations IGN switch to starter relay flipper relays. Planning on turning one fan 1 at 190 and fan 2 at 210 but want them on when the AC compressor is engaged. These SPAL fans work well to keep the engine cool and are great for LS swaps as well. Do I just connect the blue wire (rad fan) from the LS3 power center to the 40A circuit breaker?? Dec 30, 2024 · C3 General - LS swap engine temps - Curious on comparing engine temps for those that have LS swapped their C3. Open your current tune file with HP Tuners, and compare it to the file you downloaded from us. May 27, 2020 · Trinary Switch Integration with Dual Fans LSx Swaps Hey guys, I'm hoping there's an answer here. Easily add electric fans with our Sealed E-Fan Add-on Module (Includes PWM module for Fan relay control) The CPW Stocker series controller kit contains the following: Pre-programmed E92 or E92A ECU Stocker series harness for L83/L86 engine MAF sensor Weld-in MAF sensor bung Oxygen sensors DBW accelerator pedal This is what I did with my swap and it works well so for those wanting a cheap ls swap fan setup this will help guide you in the right direction. For those of you that have put a LS3 in your C2 with a GM performance ECM colon I'm trying to hook up the electric fans. From what I have read, most people use pin 42 only, why? Can anyone explain the functions of pin 33 Dec 12, 2019 · LS Swap - dual fan wiring LSx SwapsAll times are GMT -4. Off; Pre-Terminated; For Use w/LS Swap; PCM of NC 2003-2013 Full Size Truck Dual Fan conversion kit provides a factory looking harness kit to add high performance electric fans to your truck! - 11086-VUS/11076-VUS Trinary Switch Wiring Diagram for Derale 16795 PWM Fan Controller - 11086-VUS/11076-VUS Trinary Switch Wiring Diagram for Derale 16789 Fan Controller - 11086-VUS/11076-VUS Trinary Switch Wiring Diagram for Ron Francis AR-99 Dual Fan Controller - 11076-VUS/11086-VUS Trinary Safety Switch to PSI LS Fan Wiring Mar 15, 2019 · I think, from reading the service manuals, that the DC vs Desired thing is reversed between PWM EV (which the C7 brushless fan uses) and PWM Electric (which the C6 fan controller uses), but I'm not sure yet. Simple and easy to install, this sealed three relay dual fuse module will make installing a set of electric fans on any project a breeze and get you cooling in no time. Look at the Four Seasons part number 35879 thermostatic fan controller kit for about 35 bucks each. Swapping in a 350 SBC or modern LS engine turns these cars into serious street or strip machines. Makes for a great add-on to our sealed E-Fan relay kit. Discover high-quality air conditioning kits, radiators, and radiators with fan kits for LS & LT swaps. Lots of good set-ups out there, both aftermarket and factory retro-fits. I have a car with an ls-7 run by an E38 ecm. Remember, the truck will need to be tuned in order to enable electric fan control by the factory PCM. We sell a wide variety of auto parts, equipment, tools, motorcycle parts, heavy truck parts, tractors, lawn mowers, pool parts These shroud kits with fans are a direct bolt-on for the 88-98 GM trucks and 92-99 GM SUV's using a 40" radiator. The time now is . Still having issues, can’t get efans to kick on with ac, have system set Jul 28, 2023 · Mech Fan to Electric Fan Swap - Harness questions, opinions, and considerations electric fans fan controller fan harness Jump to Latest 5K views 4 replies 2 participants last post by Reaper04 Aug 8, 2023 LS Swap DIY Standalone Factory Harness Mod Kit- complete engine management fuse & relay panel ready to go with installation instructions included. I will also add that a custom tune from someone Dec 6, 2023 · Hi guys. Jun 28, 2025 · While other options like the WindChill™ LS 3-Row Radiator, Shroud/Fan, or high-capacity radiators like the 3-Row Cooling Radiator Fan Shroud Set for 1978-1987 Chevy also excel in cooling capacity, the dual fan setup of this kit provides superior thermal control during aggressive driving and track days. Feb 7, 2021 · C3 Tech/Performance - LS Swap 2-speed fan wiring - Happy Super Bowl Sunday, It is snowing here so I thought I would work on a couple indoor projects, one of which is wiring up the fuse block and relays for a 2 speed fan controller. Mar 28, 2016 · Electric fans with PSI harness LSx Swaps Aug 2, 2024 · Electric fan control wire and an IGN depending which fan I go with. Jun 6, 2020 · While searching around for fans to cool the LS3 swap I came across two good possibilities. This donor didn't come with the option for electric fans, but a 2005 did. Vortec T56 Non Electric Stand Alone LS Swap Harness for installation of GM EFI Engine in your performance vehicle. 6% positive Jul 13, 2020 · C1 & C2 Corvettes - LS3 Swap Thermostat and Fan Temp - For those who have done an LS3 conversion what engine thermostat and fan temp range are you using? I have a dual fan radiator coming and I do not think the connect and cruse output has enough power to run both fans. The PCM is sending a ground signal to the relay but the relay is not activating. C7 Corvette 600w fan with integrated pwm controller 2008 Ford Fusion fan and pwm controller Could not find the exact size/dimensions of these fans so noted the radiator dimensions. Stand alone wiring harness has 2 circuits coming from ECMone for each fan. See Cooling System Rods & Relics - Fort Erie, ON | Collector Car Tech Save Share Reply Quote Like R Rockinkees Discussion starter 88 posts · Joined 2019 #13 ·Jan 6, 2020 RapidTransit said: Jul 11, 2023 · About this item [Compatible]: This dual speed electric fan control wiring harness kit is specifically designed to be compatible with Chevy Silverado, Avalanche, Suburban, Tahoe, GMC Sierra, and Yukon models. If your engine uses a cable throttle body, begin Jan 30, 2025 · I know someone posted a wiring diagram for wiring 3 relays to control 2 cooling fans with a AC trinary switch override but I can't fine it if anyone can help me out. Any of the LS computers will run the factory fan setup. I used a factory harness and a factory fuse/relay block i also put a ac pressure sensor in so computer could operate the fans. Option 1: Explorer 11-blade fan and HD Clutch This option consists of swapping the stock mechanical fan and clutch I did the electric fan conversion on my 2001 silverado with 4. May 16, 2018 · LS-1 Dual Electric fans Corvette tranny servo swap Audio: Head Unit: Alpine Speakers: Alpine SPR-60C 6. I?m from Belgium and LS swapped a 1981 G20 chevy van. I’ve got most of the big ticket items except for the radiator, and fans. This allows the end user to have a manualoverride for fan control. I bought the 98-04 Dodge Intrepid radiator fans, which has both fans wired together through a harness. NOTES: This COMPLETE controller kit from PSI includes everything you need to get that Gen 5 LT engine and 6L80E/90E, 8L90E, 10L90E or manual transmission running in your project vehicle. I would go with a controller that turns off at around 195°. Ensure proper integration and optimal performance with our comprehensive controller kits. Ensure optimal cooling and comfort for your vehicle with our comprehensive selection. The fans were wired to a fan controller (dakota digital pac-2750) but they are now triggered using the pcm (pin outs 42 and 33). With the help of some Product Description LS Swap DIY Harness Rework Fuse Block kit for LS Standalone Harness with Fans and/or AC Application 1993-2024 Port Injection EFI systems. Also you may want to consider putting a lower temp thermostat in your water pump. This same setup can be used on 03-04 trucks as well, however, the only difference is the wiring that connects to the PCM. Feb 28, 2017 · Can you control the fans separately at different setpoints when using the E67 controller? The fan control for the cooling fan relay on the GMPP harness has the 2 different inputs form the ECM, tied together at the coil of the fan relay. But the stage 2 doesn't activate with ac pressure. May 4, 2015 · This is exactly the temperature that my 1970 GTO (LS swap) maintains using the stock thermostat and programming that came with the GMPP ECU kit. 8 fan, is more durable and lower profile. The Fan Relay Kit is all you need to get your electric fan running on you LS Swap. The PCM calibration is specific to each of these implementations. When I measure voltage at the relay I get 12v on both sides of the coil. Get step-by-step instructions and tips for a smooth and efficient installation. Jun 12, 2013 · The controller I bought comes with 2 fan control outputs. I am using HP tuners, have pin 17 hooked to ac wiring, pin 55 grounded (totally stock 95 ac system). Except I put the switch in the cylinder head. But there is more there to be had. It looks a little ghetto, but works like a I put Dorman LS1 replacement fans on my 2002 Silverado with a Blackbear performance harness. This unit is rated to close the circuit at 190*. Unlike the previous LS ECM's the Gen 5 ECM's only have an output for one fan but the factory output is a pulsed (PWM) signal. In this video i remove my adjustable thermostat for my electric cooling fan and install a set temperature thermostat. The time now is 07:25 PM. We are committed to providing customers with cost-effective products and first-class shopping experience. I have a After that, it's just a matter of connecting the fan harness to the electric fans and mounting the relays to the outside of the ECM cover using the supplied screws. You can find these parts in our amazon Sep 1, 2022 · I'm running electric fans on my LS swap 70 El Camino and I'm not using the PCM to control them. Jun 25, 2008 · Hello, Trying to do an electric fan conversion. Aug 28, 2016 · The document provides wiring diagrams for electric cooling fans using relays, switches, and thermostats. I'm in the process of hooking up the fans to the Holley ECU (Terminator X Max), and I see in the configuration that there's a checkbox for "Always On With A/C". Sep 6, 2020 · Just purchased a radiator and cooling fan from universal parts inc. Ive obviously either did use the correct settings or my sensor Jul 15, 2014 · I have a Lincoln Mk VIII fan installed for my LS swap, single fan but dual speed. Electric fans free up a couple horsepower/torque, give you more room in the engine bay, and seem to have some sort of hero status. Also got to thinking of j May 13, 2022 · I was interested in converted from a clutch fan to electric fans. I would like to switch my manual fan for an electric fan, and I would like to do it in the most efficient way, with respect to dollars, work, and complexity. Sep 21, 2020 · Ok hopefully i can make sense!!! I have an LS engine, Vintage Air and dual fan setup. Nov 16, 2010 · Im tryin to convert from the hydraulic fan pump on my 2000 Ls to a 2004 electric Ls. Simple plug and play and the fans work just like a factory setup without all the need for extra controllers and such. According to oem production standard manufacture. Straight or curved blade, single or dual fan, and more!. See schematic below for reference. We usually package this fan with all our 52MM dual core radiators for extra clearance between the fan and the engine as well as the increased Nov 24, 2015 · Performing a LS Swap? You need to check out this guide. We use these to supply ground to either the fan or fan relay, but it's rated to 30 AMPs for use on the positive side as well. Heeding Derale’s advice, we opted to use an external cooler for both the engine oil and the transmission fluid on our LS swap in addition to an electric fan controller, which we’ll cover in a future story. I suspect mine are not coming on and need to change the switch/sensor Mar 9, 2015 · LS SWAPS: Accessory Drives and Cooling System Guide Includes in-depth instruction and photos. 2. My intention was to allow the ECU (E38) control both low and high speeds of the fan. . With the fan type set as pwm electric, when the fan turns on the relays buzz. 3 swapped in . Wich is true. 5" component set, 4X6 Infinity Kappas Subs: 2-12" Kicker CVT's Amps: Alpine-M1000 (subs), Alpine MRX-F65 (Speakers) Tires/Wheels: 305/70R16 NITTO Terra Grapplers 16" PROCOMP 7089's Suspension: 2" leveling kit 3" Fabtech Spindle Lift Kit Oct 13, 2019 · I've also attached the vintage air wiring diagram when using a trinary switch. General details: If you are running dual fans and want to have factory-like fan control, this kit is just what you need! In GM LS applications GM used three relays to control your fans in series to enable the fans to work together. WILL NOT work with Gen V Direct Injected applications. Today at Ugly Truck, we're wiring up the factory electric cooling fans on this 2004 6. Jul 13, 2020 · Though fan isn't need at speeds, it still works fine. After that, it's just a matter of connecting the fan harness to the electric fans and mounting the relays to the outside of the ECM cover using the supplied screws. Jun 29, 2011 · This is a step-by-step tutorial on how to upgrade any 99-02 GMT800 truck or SUV to the 05-06 GMT800 electric cooling fans. Jan 13, 2021 · No more sticking a temp bulb through the radiator. Its a PWM controled sealed motor unit. But everytime I i try to just connect the ground on the fan, and the positive to a source in the fuse box. Jul 30, 2024 · So be on the ready I'm using a fan assembly from a '08 Chrysler Sebring on my radiator for my LS swap. In this video I show you how to set your fans using HPtuners. This fan runs standalone and does not need any input from the GM computer. Jun 25, 2019 · 1995 ls (4. I love my manual fan switch. Electric Fan Patches Our fan patches and fan information for our electric fan kits are hosted here. The PCM has 2 relays in the aux Standalone harness fuse box (Fan 1, Fan 2) and 2 red wires coming out of aux fuse box, 1 wire going to each fan. The fans work on stage 1 as they should. 15 hours ago · GM G-body cars (1978–1988) were built with classic style, but most left the factory with the underwhelming 305 small-block. Dec 12, 2019 · LS Swap - dual fan wiring LSx SwapsAll times are GMT -4. Simple and easy to install, this sealed dual relay/fuse module will make installing a set of electric fans on any project a breeze and get you cooling in no time. I wired them according to the Be-Cool instructions with there supplied temp sensor control switch. Aug 26, 2020 · Wondering if any of the ls swap guru's have delt with this and come up with a solution. Mounting hardware and insulated terminals Detailed instruction sheet Installing air conditioning to your LSx powered hot rod? Need cooling fan relays to operate off of a thermostatic switch and when your a/c is on? The dual activation cooling fan relay kit by Painless Performance is exactly what you need. Tried setting desired % vs ECT to 100% over 89c/190f, but nothing happens at over 200f. This utilizes a 14” SPAL brushless variable speed fan with a built-in fan controller and all wiring. Website filled with info for swaping GM LT1/LS1/Vortec Truck 4. I was mainly wondering if the lmc kits are good or if its better to source Nust got a 81 malibu with a 5. I did the efan swap on my old jeep and it was the best thing I ever did. May 25, 2023 · Just copy the fan tab out of something that has electric fans from the factory. The power source should be a fused 12V connection capable of handling the fan’s current draw. The fans are relay controlled. 8. It shows both single speed and variable speed fan controller options. 72K subscribers Subscribed This is the best Chevy Truck Electric Fan Conversion Kit on the market today! This kit includes a custom built aluminum shroud (specifically for radiators with a 34" core measurement), two 16" SPAL fans, one Davies Craig #0444 dual fan controller, all mounted as one unit on the shroud ready to wire into your vehicle. 3… Connect PWM input signal from ECM Connect 12V switched power and ground Connect ground triggered relay control output wires Jun 6, 2012 · also they have a ton of electric fan controls! alot of singles and duals. 3/6. com: CULMKARI Dual Electric Fan Upgrade Wiring Harness Fits GM 1999-2006 ECU Control, Part Number 7L5533A226TWe have a professional production and R&D team. If my pump/fan went, I might consider an electric fan also. Dec 12, 2023 · adding fan control through ECU Gen 3 5. Discover premium LS swap engine controller kits for Gen III, IV, and V engines. This fan harness is designed to work independently from the engine harness and with the ECM control wires. 3K subscribers Subscribe Subscribed Jun 25, 2008 · Hello, Trying to do an electric fan conversion. 3 radiator with Intrepid fans is the way to go. Shop now! This controller system is a true stand-alone system for use in older vehicles, as all that's needed to get a vehicle running with it are power and ground sources, a fuel pump able to support 58-psi (400 kPa) at the fuel rail, and an electric cooling fan. My understanding of this switch is when the rad fan is off (no engine coiling required), the switch will power up the rad fan when the AC system requires it. So I connected one (the blue wire) fan output to F1 for fan relay 2 and the other fan output (orange) to fan relay 1 D4. This guide walks through the parts, challenges, pros/cons, and what you actually need to make the swap successful. Covers all the criteria to consider when starting an LS swap project Nov 22, 2017 · I have a 97 k3500 BB that is 0411 swapped and I bought the Be-Cool radiator module with dual electric fans and three relays one for each fan and one to engage the fans with the the A/c. 2 extra cab, & manual transmission. Eventually i'll wire in the PCM's fan control which will know when to turn off the fans. Jun 15, 2005 · Separate pump and resevoir. Many GM trucks equipped with a Gen III PCM use a mechanical fan. How do I get the fan to turn on and off at specified temps without the relays buzzing? Jan 3, 2020 · If you used a 200-185 fan controller, it might never turn off in hot weather operation. May 11, 2010 · ^+1. The Derale 16825 High-Output Dual 12" Electric Fan With Aluminum Shroud generates the most real-world airflow in the smallest package on the market. The fans work through pin 42 on pcm and the green wire splices into the AC wire. Its a aluminum radiator and a single spal cooling fan. In this video I'm showing you guys how simple it is to wire a relay to control your electric fans on your LS Swap!Affiliate Disclosure: Links in this article Apr 3, 2018 · LS Swap Controlling Electric fans with AC by brandtjohnd » Wed Jul 14, 2021 7:07 pm This post is for informational purposes only. It gives you the best control over your engine temp at the flip of switch. It's quiet, cools the engine well, and fully covers the 350 sized radiator. This kit uses a custom aluminum shroud that we make in house. can I separate these two inputs and add another relay to Jun 24, 2025 · Learn the best electric fan for a radiator and type to use for your build. Description Our DIY kits are designed for installing these new GM EFI engines into your ride, whatever it may be. I have a fan 1 ( low speed) and fan 2 89 Chevy Caprice Ls Swap how to wire Electric Fan controller Willie Rebuildz 3. It is what I used for electric fans with a black box that had a single fan output. This is the same fan as used on the 2012 and newer Jeep JK's. I believe it is programmed for Low/High operation. After doing some searching here, it seems a segment swap might Hello, I?m new to this forum. Simply program how you want them to turn on/off in the tune and your done. Can a standard electric cooling fan be used? - Yes. Shop BP Automotive the best auto parts. 8/5. I'm a complete idiot when it comes to wiring and I'm looking for info on setting up my dual electric fans… Feb 25, 2011 · What's in the box Dual Activation Fan Relay; Thermostatic Switch 205 deg On/190 deg. How do I wire the 2 pin connector. 0 LS swap. If your project uses electric fans, begin with a PCM calibration from a vehicle that has electric fans. Learn how to properly wire a fan relay for an LS engine swap. Shop XDP. How do i Nov 14, 2016 · Apparently the Chevy Performance LS3 crate engine ecm and wire harness is set up for a single speed fan. If I ground the relay terminal that the PCM Dec 17, 2019 · Here’s how to install an affordable cooling system in your vintage ride for your modern LS-swapped engine. I highly recommend it if you are worried about engine temp. LS Swapshop 11. Mar 28, 2016 · Electric fans with PSI harness LSx Swaps Feb 15, 2015 · Base Calibration General Motors implemented the A/C system in several different ways among Gen III vehicles. This will be one of many videos upcoming to help with you LS Swap so you can "Wire it Up & Fire it up!" Oct 21, 2018 · C1 & C2 Corvettes - LS3 ECM to Electric Cooling Fan questionmodified folks - Guys I have this question on the LS1 tech Forum but they're not very good at answering like you fellas are. This kit will control the engine, transmission, and cooling fans Our first kit is the LS1 fan kit. This shroud has plastic flaps for air flow and is powdercoated black. Wiring ensures the fan only operates when needed for cooling and includes safety features like fuses and diode protection. My truck is a 86 with a factory 305. That setup uses 3 relays and high/low fan speed outputs from the Aug 1, 2019 · This is likely another reason why the GM LS fan controller scheme uses the series/parallel scheme. Aug 28, 2024 · How are you guys wiring your dual electric radiator fans? My LS PCM from PSI conversions apparently has low speed and high speed fan control wires, which I believe provide a ground to pin 86 on the fan relays. Both fans are running in low speed mode, essentially avoiding the gaping hole in the shroud. It requires some trimming but we include all hardware and bracketry. The tune file was set up for discrete fan control as I received it. Using the ECM, no other modules. So I am planning to use the VA trinary switch to turn the fans on when the AC is turned on. Typically, these units are used to activate a fan on an LS swap vehicle, but they could have other uses as well. ofose fuep eauoe hkrcdhu ewlyxgl jswhj lkg jxkmc wqpar bngn vsj huhiccd keuxur byhrodw ozxm