2eighTZ4me Posted June 18, 2015 Share Posted June 18, 2015 I am about to get underway with an LS6 swap. I purchased the motor, and it came with the entire engine bay harness. The motor is out of a 2004 Cadillac CTS-V. I am dropping it in to my 240 track car, which is currently run by MegaSquirt MS2. Would I be better off trying to use the connectors off the Caddy's engine bay harness and adapting them to the relay board, or trying to figure out a way to wire up each individual input? I am still researching all of this, and am an extreme newbie at the LS swap. Thought I'd throw that out there. Thanks! Quote Link to comment Share on other sites More sharing options...
BrandenZ Posted June 19, 2015 Share Posted June 19, 2015 Is your intent to try to run the LS6 using MegaSquirt? I certainly can't advise you if that's the case. I can say that folks have had quite a bit of success on LSx motors simply using hptuners (or something similar) to re-flash the PCM, be it just to tune for say I/H/E, or even for spray or boost. I likely won't get underway with my swap until after the current racing season closes out, but based on the research I've done, I think I'm going to save myself the headache of having to print a giant wiring diagram and follow each and every pinout and either get a re-worked harness from Speartech, or reach out to PSI and get a standalone from them. PCM pinout diagram for download: http://www.cadillacforums.com/forums/2004-2007-cadillac-cts-v-general/170791-ls6-cts-v-pcm-wiring-diagram.html Speartech link: http://www.speartech.com/LSX_Wiring_Harness_Rework_s/1833.htm PSI link: http://www.psiconversion.com/ Hope it helps! Quote Link to comment Share on other sites More sharing options...
CableSrv Posted June 19, 2015 Share Posted June 19, 2015 don't forget ChevyThunder for standalone harnesses. Cheapest of the group and still pretty damn good. Quote Link to comment Share on other sites More sharing options...
Jay Gadsby Posted June 19, 2015 Share Posted June 19, 2015 (edited) I have a BP Automotive harness, really good quality. Has all new connectors by Delphi and micro fuse block, relays etc. Price is also pretty darn good. Edited June 19, 2015 by Jay Gadsby Quote Link to comment Share on other sites More sharing options...
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