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*gmachinz* · 07-01-2017, 05:08 PM

Well I might be able to help-Ive started building stripped down LS harnesses so while I design my harnesses a little different from everybody else, basically you have what I call a 4-wire connection.

Relay 1 is your fuel pump relay control-it is +12V IGN on via the RED pcm connector harness pin 9.

Relay 2 is your PCM switched +12V IGN on. Im a bit confused on the relay 2 wiring through the fuse panel-not sure why there doesnt appear to be a ground trigger for it-? As I said, I build my harnesses a little bit different because there are a few things most of the "online guys" do which Im not a fan of but hopefully somebody else can chime in regarding yours.

07-01-2017, 05:08 PM	#3
gmachinz Account Suspended Join Date: Jun 2011 Location: Des Moines, IA. Posts: 4,143	Re: Need help sorting ls stand alone harness Well I might be able to help-Ive started building stripped down LS harnesses so while I design my harnesses a little different from everybody else, basically you have what I call a 4-wire connection. Relay 1 is your fuel pump relay control-it is +12V IGN on via the RED pcm connector harness pin 9. Relay 2 is your PCM switched +12V IGN on. Im a bit confused on the relay 2 wiring through the fuse panel-not sure why there doesnt appear to be a ground trigger for it-? As I said, I build my harnesses a little bit different because there are a few things most of the "online guys" do which Im not a fan of but hopefully somebody else can chime in regarding yours.