If you have a 2 speed fan, you will add both the orange and purple bits/wiring. 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. This unit is rated to close the circuit at 190*. (fig.5) The relays will activate the electric fans if the thermostat reaches 205°F or if the A/C compressor clutch is engaged. 5b.Notice Flex-a-Lite / Universal Fan Motor Plugs: Use the small flat head to pry the grey retaining tabs out. GEN 3 HARNESS Ready to ship! All PSI Harnesses are Made in the USA. Since 1974 we have been providing quality electrical products to the street rod, hot rod, custom car, truck and racing markets. Testing harness operation: 1. 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. Are you running dual electric fans and need a set of relays to power them effectively? [ January 3, 2021 ] Sheet Metal Cutting and Grinding Tools with Fitzee’s Fabrications How To & DIY [ January 3, 2021 ] Clay and Sons MOPAR Salvage Yard Vehicles For Sale [ January 1, 2021 ] 1955-59 GM Truck Body Panel Alignment: Cab to Door to Fender to Hood How To & DIY [ December 31, 2020 ] Top Tested Tools and Accessories of 2020 Products & Reviews The label "TO FAN RELAY CONTROL (-) can splice into the wire from the PCM to the FAN relay. 6 talking about this. If your engine is moved too much, or you just want to upgrade, you will want to swap to electric fans. tutorials and wiring diagrams on. If your project uses electric fans, begin with a PCM calibration from a vehicle that has electric fans. 6. Build your own custom newsletter with the content you love from LSX Magazine, directly to your inbox, absolutely FREE! An … FUEL SYSTEM For the fuel system when doing an LS swap, the most common approach is to use a C5 Corvette fuel pressure regulator along with an electric fuel pump that has adequate flow, such as the Walbro 255. If you want your fan or fans to turn on with a/c compressor, you can use the following wiring to do that. When I measure voltage at the relay I get 12v on both sides of the coil. Holley and Hooker have partnered together to offer the most versatile and complete LS swap kits on the market so you can install the GM LS engine into your favorite chassis! Next, splice together both black wires from the relays (tab 85) and connect them to the thermostat switch. LS engines use a … Tug them both to confirm they are tight. Add to cart. Join the discussion. Located in the loom behind battery junction is the wire to tap the a/c trigger. Use pliers and a thin pick or screwdriver, press on the white retaining tabs on each side of the blue-clear cover and pull it off. Official Site of Ron Francis Wiring. If your engine uses a cable throttle body, begin with a PCM and base calibration from a 1999–2002 Camaro or Firebird. The process for other GM engine harnesses is similar. The output side of the temp switch then returns (one wire for single speed - two wires for dual speed) to the fusebox and goes to the fan relays. This meant fabricating, reusing, and calling friends for parts. 2. The black cover should pull off by pulling outward on the cover, releasing from the two plastic tabs. LS swap starter/ignition relay wiring question. If not retrace your steps, If so go to step #5. Take the 17mm wrench remove the nut from the red battery junction box. Once you have located the correct green wire, then go ahead and tap it. Options. Products to Compare (max of 3) X. Application 1993-2015 V8 Drive by Cable and Drive By Wire GM Harnesses. Fan #1 will be the drivers side fan and fan #2 on the passenger side over the A/C condenser. This includes the LT1, LS1, LS2, LS3, LS7, L99, L76, L77, L92, L98, LM7, LM4, LSA, LS9, L83, and the new Gen V LT1. Be Cool LS Swaps for Chevrolet/GMC Trucks Essexville, MI – Be Cool, America’s leader in power cooling systems, has done it again with their LS Swap Series Cooling Modules for … 5. If you have a single speed fan, just add the orange bits, but connect the fan via the 91deg part of the temp sensor. Compare Selected × OK. Wiring Specialties. These harnesses include the Gen II LT1/LT4, Gen III (24x) LS1/LS6 and Vortec Truck Engines as well as Gen IV (58x) LS2, LS3, LS7, & Vortec and GEN V LT / ECOTEC3 Engines. 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. Additional instructions are provided for those with fuel injected vehicles equipped with an ECM that has cooling fan activation capabilities. These LS swap kits are for 1988-1998 GM 2wd and 4wd trucks and 1992-1999 SUVs. Lubricate the PCM pin and wire on the harness tagged BLUE 42 using vaseline or die electric grease. 86 (gray/white wire) goes to the ignition switch. All rights reserved. Take your 7mm socket remove the blue PCM connector closest to the engine. 87 (red wire) connects to the positive wire on the electric fan. An LS engine swap is a No-Brainer when it comes to adding some affordable horsepower to a project car, but any swap comes with its share of headaches, including wiring. Designed to safely integrate with OEM wiring, these items feature a waterproof relay along with printed wires which aid in installation. These harnesses include the Gen II LT1/LT4, Gen III (24x) LS1/LS6 and Vortec Truck Engines as well as Gen IV (58x) LS2, LS3, LS7, & Vortec and GEN V LT / ECOTEC3 Engines. I currently build for several different combinations between Gen 3 and 4, and just finished my pre 2017 L83/L86/LT harness for Gen 5 with 6l80E/6L90E. A complete installation instruction booklet is included with every module. Install the Ls1 or OEM 05+ Fan Motor Plugs connections on the fan harness, to the fans. Jay Kopycinski Photographer, … Track Order . (fig.7) 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. Turn off the A/C. Gen II LT1/LT4, Gen III (24x) LS1/LS6 and Vortec Truck Engines, Gen IV (58x) LS2, LS3, LS7, & Vortec and GEN V LT / ECOTEC Engines. Jump to Latest Follow 1 - 15 of 15 Posts. The Wiring Specialties Pro-Series LS1 wiring harness is a Brand New, Tucked, Plug and Play harness that was designed and tested by our in-house experts specifically for any classic Chevy NON-EFI chassis or race car with an LS1 engine swap.It was modeled on the actual LS1 engine and is race-proven to perform in challenging conditions. We have moved! 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