Ls Engine Wiring Harness Conversion Primary wire is typically an 18 gauge wire and is the most common wire found in wiring harnesses. the larger wires that feed heavy draw circuits are typically 14 to 12 gauge. the wire in painless performance kits runs a little larger than the standard; the primary wires are 16 gauge, with 12 gauge for heavy draw items such as the headlights. What you need to know. before you order a harness for your project, you’ll need to know some information about your engine and transmission. for example, being able to identify the year of the powerplant, if it’s drive by wire or drive by cable, what injectors you have, whether it’s a gen iii or gen iv, and so on will be a big help when ordering a harness.
Ls 5 3 Wiring Harness Conversion Thread starter. itrader: (4) join date: feb 2008. location: arizona. posts: 2,079. likes: 1. received 8 likes on 7 posts. 5.3 wiring harness wiring diagrams here!!! thanks to my man mark west for hooking this up for me these are fuseblock and pcm and other essential wiring diagrams. 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. 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 use the highest quality wire, brand new oem connectors, weatherproof fuse and relay box. We're using the original 5.3 wiring harness, pcm, and fuse "what's the easiest way to wire an ls swap?" is a question we hear a lot, and here's your answer! we're using the original 5.3 wiring. Looking for an affordable, in stock, plug and play wiring harness for your ls swap? psi sells standalone wiring harnesses for gm gen ii, iii, iv, & v ls lt based engines and transmissions. 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.
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