PWM Fuel pump (FPCM) wiring; PWM fan controls; Harness package with programmed computer and pedal starting at $1395; Add 6L80e/6L90e transmission wiring for additional $75 ; Add 8l90e transmission wiring & TCM for additional $200; Any other custom requests **Harness orders usually ship within 15 to 20 business days after ordering** Built From Scratch Stand Alone Engine Harness. PSI sells Standalone Wiring Harnesses for GM Gen II, III, IV, & V LS/LT based engines and transmissions. Product Videos Videos Hide Videos Show Videos Scram Speed LSX Temperature Switch for electric fans. - LT1 - LS1 - 05+OEM - Flex-a-Lite - Universal - Street & Strip - We have you covered. (fig2) We'll send you the most interesting LSX Magazine articles, news, car features, and videos every week. Direct-fit Flex-A-Lite® Extruded Core performance aluminum radiator and dual electric fan system for 1967-1972 full-size 1/2-ton Chevrolet or GMC truck and SUV with LS engine swap. Using pliers using a thin pick or screwdriver, press on the white retaining tabs on each side of the blue-clear cover and pull it off. Next, you’ll want to find the ignition switch wire (usually a grey colored wire) and wire it to pin number A9 for the ignition switch, which is under block C1 on the fuse panel. This way the PCM can still control the fan when A/C is off, or when A/C is commanded on, the fan comes on right away. We also carry many other products to help you with your swap, including hard to find air conditioning parts! Created with Sketch. underneath the 10 mm bolt that you removed and re install the bolt. 4a. GENTLY, pull on it blue42  fan harness wire to seat it and make sure it is secure to not back out when reinstalling the retaining covers. Including, but not limited to LT1, LS1, LM7, LR4, LQ9, LQ4, 4.8, 5.3, 5.7, 6.0, 6.2, and 7.0 Engines. (fig.1) 87 (red wire) connects to the positive wire on the electric fan. Take a look at the video above from YouTube user AGearhead4Life (aka Mark Burch). Vehicles supported include 1993-97 LT1 and all 1996-2013 Trucks, Camaro, Firebird, Corvette. We hand build every harness to fit exactly what your project needs and they actually form fit on the engine to make your wiring look and perform perfectly. 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). If you’re in the process of performing an LS swap, but find yourself stuck playing with electrical gremlins, have no fear. Next, remove one of the two 10mm bolts on the Alternator/Accessory bracket that secure the junction box. All rights reserved. These LS swap kits are for 1988-1998 GM 2wd and 4wd trucks and 1992-1999 SUVs. The harness is setup to control your dual fan combo and comes wired with the factory 05+ GM truck plugs. Use our dual fan wiring diagram and guide to make sure you properly wire your fans to your thermostat. Fan #1 will be the drivers side fan and fan #2 on the passenger side over the A/C condenser. 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. Reset Search × Search. Take your 7mm socket remove the blue PCM connector closest to the engine. Start your wiring project by taking both of the positive wires from the fans and run them to the yellow wires on each relay (tab 87). Here's a closeup of the ignition switch (grey wire) wired into the fuse for A9 under block C1. Turn the AC on. FAILURE TO DO SO HERE WILL RESULT IN TROUBLE!. If not retrace your steps, If so go to step #5. Burch continues with the crankshaft sensor (CS), which is another critical component necessary for the initial wiring, stating that the ECU will need to measure the rotation of the crankshaft. Track Order . Electrical wiring in a vehicle can sometimes get pretty tough. Power leaves the fuse box via fuse F19 and goes to the input side of the temp switch. This can be accomplished several ways. This is the most cost effective method. 86 (gray/white wire) goes to the ignition switch. These LS swap kits are for 1988-1998 GM 2wd and 4wd trucks and 1992-1999 SUVs. The throttle position sensor (TPS), idle air control valve (IAC), and manifold air pressure (MAP) are three more sensors that will need to be used too. - LT1 - LS1 - 05+OEM - Flex-a-Lite - Universal - Street & Strip - We have you covered. We also carry many other products to help you with your swap, including hard to find air conditioning parts! Use our dual fan wiring diagram and guide to make sure you properly wire your fans to your thermostat. 3. ¼ nut driver Use the small flat head to pry the grey retaining tabs out. tutorials and wiring diagrams on. All PSI Harnesses are Made in the USA. 30 (other red wire) needs constant 12-volt power from the battery. LS Swap DIY Harness Rework Fuse Block kit for LS Standalone Harness with Fans . The center of this conversion is our engine and transmission mount kit. Flip the connector over and Remove the PCM. Compare These Parts Talk to the Experts. Computers, Wiring and Fuel Injection Many of us speak nostalgically about the days when engine electrical and fuel systems were about the simplest parts of an engine swap. Additional instructions are provided for those with fuel injected vehicles equipped with an ECM that has cooling fan activation capabilities. 86 (gray/white wire) goes to the ignition switch. That's where A-Team's engine and transmission wiring harness comes in. Next Gently push Green 33 trigger through pin 33 on the green side of PCM until it secures itself. Reply. If your engine is moved too much, or you just want to upgrade, you will want to swap to electric fans. The label "TO FAN RELAY CONTROL (-) can splice into the wire from the PCM to the FAN relay. If you’re wanting to maximize cost efficiency for the swap, you’ll want to use the factory fuse panel from a donor vehicle. Paying attention to the temp guage, when the engine coolant reaches the desired turn on value in the PCM set by the tuner that tuned the PCM, the other fan will turn on high and you will see 2 fans hi operation. Take the 17mm wrench remove the nut from the red battery junction box. Trimming of the junction box must be done to get it to close. The black cover should pull off by pulling outward on the cover, releasing from the two plastic tabs. Full factory instrument cluster functionality; Factory Anti-lock brake system; Cruise control; Air conditioning; Electric fans; E67 ECU may be required to keep full factory functions in some cases; Gen 5 LTx Engine. Stand alone LS wiring harness, ECM with vats cleared, LS engine and transmission Pliers Toggle menu; Login or Sign Up; Search. From the common budget option of the “Ford Windstar fans” which uses a set of fans … When installing the tagged harness leads to your exsiting fan motor plugs. There are a great variety of option here. 4.b 03-05 Dual Pin Triggered applications: Use pliers and a small flat head screwdriver, remove the grey harness retaining cover from the top of the blue PCM connector. The center of this conversion is our engine mounts and crossmember kit. LS swap starter/ignition relay wiring question. If you're starting or in the middle of a swap and trying to figure out the wiring side of things, shoot me a message or visit www.lsharnessconnection.com to get started with your order! He explains to us how to properly wire a GM factory ECU the easiest and most cost efficient way. Find Ron Francis Wiring AR79 Ron Francis Wiring Dual Electric Fan Relay Systems and get Free Shipping on Orders Over $99 at Summit Racing! Testing harness operation: 1. Gently push Blue 42 trigger through pin 42 on the PCM until it secures itself. The AC compressor connector must be wired to the chassis’ output AC signal wire. You can see  both though the clear plastic. And we proudly make our products in the U.S. Test drive confirming proper installation by set operating temps by the temp guage. GM LS Engine Swap Wiring You Can Do at Home from our Chevy Tahoe harness for a L engine swap. As Burch says in the video, you should instantly hear the fuse for the repaly pump begin to prime, ensuring you have power to the ignition switch. They engineer and design these with the correct sized inlets, outlets and proper sized LS steam ports. Tug them both to confirm they are tight. Join the discussion. We have moved! 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You will need to add the female spade terminals into the fuse box for the relays K1, K6 and the fuses 3, 18, 19 and the wiring to the fan/temp sensor. This meant fabricating, reusing, and calling friends for parts. Use the small flat head to pry the grey retaining tabs out. Living in San Diego for most of his life, Harrison was exposed to a variety of cars at an early age. If you’re in the process of performing an LS swap, but find yourself stuck playing with electrical gremlins, have no fear. Once you have located the correct green wire, then go ahead and tap it. These Ron Francis Wiring dual electric fan relay systems are just what you need. *THESE ARE SPECIFICALLY ASSIGNED TO EACH FAN AND MUST BE INSTALLED ACCORDINGLY. March 20, 2020 Mad Scientist Garage Builds and Examples. You must either solder them together and shrink wrap, or crip together using the supplied butt connectors and shrink wrap using the proper wire crimpers to crimp the leads. 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