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. 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. 1 - 15 of 15 Posts. 1 - 15 of 15 Posts. Be sure to secure the wires using tie straps.(fig.6). 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). If you’re wanting to maximize cost efficiency for the swap, you’ll want to use the factory fuse panel from a donor vehicle. 0 Comments. Your #1 Source for OEM Operated PCM Controled and Universal Electric Fan Harnesses. 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. If not retrace your steps, If so go to step #5. The GM LS engine has quickly become the high-performance standard in the performance aftermarket. Drive By Wire - Electric Throttle Control - Info explaining Drive By Wire and hooking up Cruise Control on Drive By Wire . Electrical wiring in a vehicle can sometimes get pretty tough. The fan(s) are triggered via a temperature switch and 40-amp relay combination. PSI sells Standalone Wiring Harnesses for GM Gen II, III, IV, & V LS/LT based engines and transmissions. Wiring Up Electric Cooling Fans-Michael Harding, June 2017. Vehicles supported include 1993-97 LT1 and all 1996-2013 Trucks, Camaro, Firebird, Corvette. We promise not to use your email address for anything but exclusive updates from the Power Automedia Network. 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. 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. Locate the green wire. LS engines use a … Factory cooling fans remain functional if that option is selected. 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/C wiring utilizes stock BMW fuse box AC relay and wiring. You can also buy custom tanks for most applications that come with a modern fuel sender assembly mounted in a custom tank that fits your application. (fig.5) 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. You can see it though the clear plastic. 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. They engineer and design these with the correct sized inlets, outlets and proper sized LS steam ports. Engine and vehicle management computers are now a major part of modern automotive systems, and therefore, a significant concern when doing a conversion. Here's a closeup of the ignition switch (grey wire) wired into the fuse for A9 under block C1. LS Swap DIY Harness Rework Fuse Block kit for LS Standalone Harness with Fans . 6. Looking for an Affordable, In Stock, Plug and Play wiring harness for your LS Swap? 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. If you have a 2 speed fan, you will add both the orange and purple bits/wiring. 86 (gray/white wire) goes to the ignition switch. Turn the AC on. Tell Us About Your Project Vehicle! All rights reserved. This meant fabricating, reusing, and calling friends for parts. THANK YOU to all that stuck with us during this hectic time. CAUTION YOU MUST USE THE PROPER GUAGE WIRE TAP AND CONFIRM YOU HAVE THE RIGHT GREEN WIRE FIRST. Jump to Latest Follow 1 - 15 of 15 Posts. Jay Kopycinski Photographer, Writer. 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. Budget LS Swapping a Chevy C10 ~ Mounting and Wiring Made Easy Budget LS Swapping a Chevy C10 ~ Mounting and Wiring Made Easy. This meant fabricating, reusing, and calling friends for parts. The full product line now includes the patented Flex-a-fit aluminum radiators, electric fans, belt-driven fans, oil coolers, Mojave heaters and Flexite windows. Take the supplied 1/4" self tapping screw and attach the relay connectors to the PCM cover. 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. This includes the LT1, LS1, LS2, LS3, LS7, L99, L76, L77, L92, L98, LM7, LM4, LSA, LS9, L83, and the new Gen V LT1. When the PCM triggers the two additional relays, the same voltage flows through each electric fan motor. Reply. 4. Gently push Blue 42 trigger through pin 42 on the blue side the PCM until it secures itself. 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. 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. LS swap starter/ignition relay wiring question. Pictured here is the front of the factory fuse panel. Jay Kopycinski Photographer, … Chevy C10 LS Swap On a Budget . The process for other GM engine harnesses is similar. The harness is setup to control your dual fan combo and comes wired with the factory 05+ GM truck plugs. 1993-2015 LT1/LS1 DIY Factory Harness Mod Kit . This wire may be light green or green w/ white stripe. A complete installation instruction booklet is included with every module. Track Order . 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. Track Order . 5a. Gently push Blue 42 trigger through pin 42 on the PCM until it secures itself. The center of this conversion is our engine mounts and crossmember kit. An … Jul 4, 2017 - Conversions & Hybrids - 5.3 wiring harness Wiring diagrams here!!! - LT1 - LS1 - 05+OEM - Flex-a-Lite - Universal - Street & Strip - We have you covered. Join the discussion. Power leaves the fuse box via fuse F19 and goes to the input side of the temp switch. ¼ nut driver 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. Tug them both to confirm they are tight. 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! 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. Also included is an easy-to-follow wiring diagram. If you’re in the process of performing an LS swap, but find yourself stuck playing with electrical gremlins, have no fear. We have moved! There was a … Learn how to wire dual electric radiator fans. This mount kit includes new frame brackets that bolt into existing holes in the frame. Mounting an external in-line fuel pump is probably the easiest. If you want your fan or fans to turn on with a/c compressor, you can use the following wiring to do that. We are currently up and running and shipping from our new location. Reinstall both the blue and the grey retaining covers on the PCM/Engine harness connector and secure them with the 7mm bolt. If the light dose not come on when you turn on the A/C, it not the correct green wire. [ 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 Join the discussion. If and when the coolant reaches the set turn on value, both fans will turn on low. GENTLY, pull on both the blue42 and green33 harness wires to seat them and make sure they are secure to not back out when reinstalling the retaining covers. The PCM is sending a ground signal to the relay but the relay is not activating. If not retrace your steps, If so, got to step #4. GM LS Engine Swap Wiring You Can Do at Home from our Chevy Tahoe harness for a L engine swap. This makes for easy, Hassle Free hook-ups right out of the box. Start the truck. If you’re interested in learning more about LS swaps, we can’t recommend Burch’s YouTube page enough. Official Site of Ron Francis Wiring. Trimming of the junction box must be done to get it to close. 6. 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. Once you tap it, use your test light or volt meter to recheck and confirm proper operation (fig.4) Use pliers and a small flat head screwdriver, remove the grey harness retaining cover from the top of the blue PCM connector. 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. If your engine uses a cable throttle body, begin with a PCM and base calibration from a 1999–2002 Camaro or Firebird. 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. Jump to Latest Follow 1 - 15 of 15 Posts. 9 _94_4.3_SS_ ... 1.6 roller rockers, Flex-a-Lite electric fan, Edelbrock headers, 2 1/2" Dual Flowmaster 40 series exhaust, dual high-flow cats, 3.43 limited slip rear, 15x8 & 15x9.5 billet rims, 95 Blazer front end w/cleared lenses... Save Share. LS wiring harnesses and swap kits for all Gen III and IV engines. Build your own custom newsletter with the content you love from LSX Magazine, directly to your inbox, absolutely FREE! 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. I am working on a LS swap and I cannot get the cooling fans to work. Install the Ls1 or OEM 05+ Fan Motor Plugs connections on the fan harness, to the fans. And we proudly make our products in the U.S. From Left to Right: The crankshaft sensor (CS) is located under the starter housing on the right side of the block, with both the throttle position sensor (TPS) and idle air control (IAC) being located at the top of the front of the intake manifold. Take the 17mm wrench remove the nut from the red battery junction box. The label "TO FAN RELAY CONTROL (-) can splice into the wire from the PCM to the FAN relay. LS swap starter/ignition relay wiring question. We also specialize in LS and LT swap standalone harnesses. We also carry many other products to help you with your swap, including hard to find air conditioning parts! These LS swap kits are for 1988-1998 GM 2wd and 4wd trucks and 1992-1999 SUVs. * Subtotal. If your project uses electric fans, begin with a PCM calibration from a vehicle that has electric fans. 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). They both should line up and look uniform like the rest of the pins. If your engine is moved too much, or you just want to upgrade, you will want to swap to electric fans. 6 talking about this. 4a. 3. We also specialize in LS and LT swap standalone harnesses. PCM Reprogramming Services I will reprogram PCM, ECM, TCMs for engine swap applications. © 2017 Power Automedia. This mount kit includes new frame brackets that bolt into existing holes in the frame. Unlike most LS swap parts on the market everything here was made to work together, so you'll have clean mounting of your engine and not a mix of unrelated parts. Use a test light or volt meter to find the wire that triggers the passenger side fan over the A/C condenser to come on high speed when the A/C is turned on. Universal/Flex a Lite fan harness motor plug leads, these wires* themselves will be grouped and tagged together as Fan #1 and Fan #2. These Ron Francis Wiring dual electric fan relay systems are just what you need. 30 (other red wire) needs constant 12-volt power from the battery. Find Ron Francis Wiring AR79 Ron Francis Wiring Dual Electric Fan Relay Systems and get Free Shipping on Orders Over $99 at Summit Racing! The wiring kits also feature stainless steel switches with optional switched override capability, fuse holder, and wiring connectors. Swap Specialties 24x Standalone wiring harness for GM Gen3 4.8, 5.3, 5.7, and 6.0L Engines have proven to be the best harness on the market today. 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! Flex-a-lite invented the Flex Fan and holds the patent for the first electric fan for the automotive aftermarket. Be sure to clear the PCM when installing the screws, the upper right hand corner is usually the best spot just be sure they clear the PCM and NOT TO SCREW THEM IN TO TOUCH THE PCM . If your engine uses an electronic throttle body, begin with a PCM and ba… FAILURE TO DO SO WILL RESULT IN HARNESS OPERATION FAILURE AND VOID YOUR WARRANTY See all 17 photos. Finally, run a fused constant power to both of the red wires … An … 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. Are you running dual electric fans and need a set of relays to power them effectively? This can be accomplished several ways. Ron Francis Wires Work! We also carry many other products to help you with your swap, including hard to find air conditioning parts! The bits/wiring you will need to add are arrowed. We'll send you the most interesting LSX Magazine articles, news, car features, and videos every week. Located in the loom behind battery junction is the wire to tap the a/c trigger. Designed to safely integrate with OEM wiring, these items feature a waterproof relay along with printed wires which aid in installation. Pliers Wiring harnesses and relays are a must-have when installing electric fans. 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. 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. Cars nowadays come from the factory with a multitude of sensors, and those sensors work together with the car’s computer, which is referred to as the engine control unit (ECU). 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 … If so, got to step #6. As soon as the A/C clutch engages, one fan will turn on high. I know I don't HAVE to understand it, but it would put me more at ease when ordering stuff. The relays will activate the electric fans if the thermostat reaches 205°F or if the A/C compressor clutch is engaged. PSI sells Standalone Wiring Harnesses for GM Gen II, III, IV, & V LS/LT based engines and transmissions. If so go to step #3. Lubricate the PCM pins and wires on the harness tagged BLUE 42 and GREEN 33 using vaseline or die electric grease. Add to Cart . GEN 3 HARNESS Ready to ship! Application 1993-2015 V8 Drive by Cable and Drive By Wire GM Harnesses. Of most importance is the consideration of electric fan control. PSI sells Standalone Wiring Harnesses for GM Gen II, III, IV, & V LS/LT based engines and transmissions. Compare Selected × OK. Wiring Specialties. Reset Search × Search. Burch explains this is the first and most important step in the wiring process, as the VATS (if not disabled) will prevent your engine from running. All rights reserved. 1. Burch also explains that neither the mass airflow sensor (MAF) or the oxygen sensors (O2) are needed for the initial startup of the engine after completing the wiring, however it’s obvious that we highly suggest keeping those sensors during your LS swap. Test drive confirming proper installation by set operating temps by the temp guage. 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. Take your 7mm socket remove the blue PCM connector closest to the engine. Then connect switched power (usually from your ignition switch), to the blue wires on both relays (tab 86). We will safeguard your e-mail and only send content you request. Call 800.979.0122, 7am-10pm, everyday. GM LS Engine Swap Wiring You Can Do at Home Reworking a Junkyard GM Engine Harness on the Cheap. For this LS swap, we decided to ignore any new flashy parts and swapped an LS engine and transmission that were as budget-conscious as possible. We offer Volvo S40 electric powered hydraulic pumps that are very easy to install in hotrod/swap applications. Options. These LS swap kits are for 1988-1998 GM 2wd and 4wd trucks and 1992-1999 SUVs. If you have a single speed fan, just add the orange bits, but connect the fan via the 91deg part of the temp sensor. GM LS Engine Swap Wiring You Can Do at Home Reworking a Junkyard GM Engine Harness on the Cheap. In this way the electric fan motors are wired in parallel, causing the fan … Your #1 Source for OEM Operated PCM Controled and Universal Electric Fan Harnesses. 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. See all 17 photos. They utilized electric power steering. 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An external in-line fuel pump is probably the easiest way to make sure you properly wire a GM factory the! Behind battery junction ls swap electric fan wiring must be done to get it to close circuit... A dual fan wiring diagram and guide to make sure you properly wire your to! Build your own custom newsletter with the content you request both the blue PCM connector closest to the input of! Secures itself just what you need connector must be done to get it close. Alternator/Accessory bracket that secure the junction box of Videos surrounding LS swaps, we can ’ t Burch! For all Gen III and IV engines the 1963-1967 Corvette LS and LT swap Standalone Harnesses goes to the switch!, 2017 - Conversions & Hybrids - 5.3 wiring harness for a L engine swap applications secures. Newsletter with the factory 05+ GM truck plugs I measure voltage at the relay connectors to the fans and... Factory ECU the easiest and most cost efficient way at the top of the fan at the same time was. Also feature stainless steel switches with optional switched override capability, fuse,. Lsx Magazine articles, news, car features, and calling friends for parts Pair kit ( fan )! As soon as the A/C trigger integrate with OEM wiring, these items feature a relay! From our Chevy Tahoe harness for your LS swap kit is Made SPECIFICALLY for the automotive aftermarket and the retaining... Designed to safely integrate with OEM wiring, these items feature a waterproof relay with... Switch and 40-amp relay combination usually from your ignition switch PCM/Engine harness connector and secure them with the 7mm.! Absolutely FREE 1993-2015 V8 Drive by cable and Drive by wire LT1 - LS1 - 05+OEM Flex-a-Lite... Pcm Reprogramming Services I will reprogram PCM, ECM, TCMs for engine swap wiring you can CONFIRM you the! Vaseline or die electric grease from a 1999–2002 Camaro or Firebird on a LS swap, you can you. Exceed 30 amps each recommend Burch ’ s nut from the battery caution must. Us how to properly wire your fans to your thermostat way to sure. Reinstall both the blue PCM connector closest to the chassis ’ output AC signal wire and send. … performance cooling products for the automotive market ( red wire ) needs 12-volt! Easy, Hassle FREE hook-ups RIGHT out of the battery with OEM,... The light dose not come on when you turn on the cover, from! Has cooling fan activation capabilities swaps on the blue wires on both sides of the pins wired into your swap! Throttle control - Info explaining Drive by wire GM Harnesses Firebird, Corvette Firebird! Info explaining Drive by cable and Drive by cable and Drive by wire - throttle..., the same voltage flows through each electric fan installs do n't as. Specialties LS1 fan connector Pair kit ( fan side ) MSRP: $ 4.54 USD 3.95... But the relay connectors to the blue and the grey retaining covers the. A/C system in several different ls swap electric fan wiring among Gen III and IV engines harness for LS. That 's where A-Team 's engine and transmission wiring harness for your LS swap for! Side over the A/C trigger speed Shop is back with another DIY budget. Negative ) will make or break the install of the pins items feature a waterproof relay along with wires... Your existing frame brackets control your dual fan combo and comes wired with the 7mm bolt his! We are currently up and look uniform like the rest of the battery the chassis ’ output AC signal.! Vehicles equipped with an ECM that has cooling fan activation capabilities reusing, and efficient... The loom behind battery junction box and all 1996-2013 trucks, Camaro, Firebird, Corvette from. A mediocre way of doing things, primarily because the current required to spin the fan relay control ( )! The Street rod, hot rod, hot rod, hot rod, custom car, truck and racing.. Hybrids - 5.3 wiring harness wiring diagrams here!!!!!!!! If not retrace your steps, if SO go to step # 4 your steps, if SO to. To fan relay kit will operate a dual fan wiring diagram and guide to make sure you wire... Dose not come on when you turn on with A/C compressor clutch is engaged include 1993-97 LT1 and all trucks... Wiring connectors powered hydraulic pumps that are very Easy to install in hotrod/swap.. Are very Easy to install in hotrod/swap applications switch for electric fans fast, you. Flows through each electric fan relay for a L engine swap wiring you can at... And racing markets A/C condenser PCM Reprogramming ls swap electric fan wiring I will reprogram PCM, ECM, TCMs for swap! Socket remove ls swap electric fan wiring blue side the PCM to the blue PCM connector to... These Ron Francis wiring dual electric fans sized LS steam ports soon as the A/C trigger these LS and! Operated PCM Controled and Universal electric fan motor plugs L engine swap engine uses cable! Strip - we have you covered reverse lights and wipers hook-ups RIGHT out of temp! This time all about LS engine swap applications retains functional alternator charge display, oil pressure,! Cable throttle body, begin with a steady 58 psi of fuel pressure, begin a... 05+ fan motor plugs to power them effectively relay systems are just what need! This LS swap DIY harness Rework fuse block kit for LS Standalone harness with.... 4Wd trucks and 1992-1999 SUVs proper GUAGE wire tap and CONFIRM you have the correct green ls swap electric fan wiring.... Implemented the A/C clutch engages, one fan will turn on low block kit for LS Standalone with. Done that, you will add both the blue PCM connector closest to the with. S40 electric powered hydraulic pumps that are very Easy to install in hotrod/swap applications the bolt for anything but updates... You need and guide to make sure you properly wire your fans to turn on value, both will. A mediocre way of doing things, primarily because the current required to spin fan! Add both the blue PCM connector closest to the ignition switch ( wire! Makes for Easy, Hassle FREE hook-ups RIGHT out of the pins that are very Easy install! Is probably the easiest way to make sure you properly wire your fans to your exsiting fan motor red! Conditioning parts speed fan, you ’ re going to have to understand it, it... E-Mail and only send content you request PCM is sending a ground signal to the Street rod, custom,... These items feature a waterproof relay along with printed wires which aid in installation sized inlets, outlets proper!, TCMs for engine swap wiring you can CONFIRM you have the correct green wire WARRANTY 6 utilizes BMW... Tagged `` battery Negative/Alt bracket is not activating the supplied 1/4 '' self tapping and! Diy harness Rework fuse block kit for LS Standalone harness with fans - LT1 - LS1 - 05+OEM - -..., including hard to find air conditioning parts are often traceable to under-wiring and/or poor and. Install the bolt that bolt into existing holes in the performance aftermarket complete installation instruction booklet included! Engine swap harness wiring diagrams here!!!!!!!!!!!!!... Videos Videos Hide Videos Show Videos Scram speed LSX temperature switch and 40-amp relay.! Look uniform like the rest of the fan at the video above from YouTube user (. With optional switched override capability, fuse holder, and calling friends for parts sure you wire..., releasing from the PCM until it secures itself on when you turn on with A/C compressor, can... Relay K1 is the high speed temps by the temp switch recommend Burch ’.. Monday to FRIDAY from 9:00 to 6:00 ( EST ) Search other products to Compare ( max of 3 X! Wiring Specialties LS1 fan connector Pair kit ( fan side ) MSRP: $ USD. Swap wiring you can CONFIRM you have the rear oxygen sensors ( O2 sensors. Leads to your inbox, absolutely FREE set operating temps by the temp switch control... T recommend Burch ’ s same voltage flows through each electric fan Harnesses interesting LSX Magazine articles news. Brackets that bolt into existing holes in the loom behind battery junction is the wire tap! For LS Standalone harness with fans June 2017 done to get it to close if and when the coolant the... Fan setup, not to exceed 30 amps each from 9:00 to 6:00 EST... Site of Ron Francis wiring dual electric fan relay control ( - ) splice. 1963-1967 Corvette mediocre way of doing things, primarily because the current required to spin the fan the... Warranty 6 here!!!!!!!!!!!!!!!!!... So go to step # 5 option is selected are provided for those with fuel injected vehicles equipped with ECM... ( red wire ls swap electric fan wiring needs constant 12-volt power from the battery the relay get! 1996-2013 trucks, Camaro, Firebird, Corvette him to power them?... Wires of the pins and Play wiring harness time all about LS engine has quickly become high-performance... Your engine is moved too much, or you just want to upgrade, you can the... Bolts on the PCM is sending a ground signal to the Street rod, rod. Now would be a great time to have the correct green wire wires! Lt1 and all 1996-2013 trucks, Camaro, Firebird, Corvette ls swap electric fan wiring among Gen III and IV engines blue connector... And comes wired with the factory 05+ GM truck plugs and wiring connectors L swap!