modifying a stock harness - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**michael bustamante** · 08-16-2016, 06:01 PM

2003 yukon 5.3 2wd dbw
i cut off the plug for the fusebox and i labeled all the pink wires per the instructions on lt1swap.com
problem is the only pink injector wires labeled are the #2 and 4 which is
E5
which pinks are the other fuel injectors?

**dec010974** · 08-16-2016, 10:44 PM

I don't have a schematic in front of me, but you should be able to trace the wires back to the injectors. At least that's what I do. I like the assurance that the schematics I read are indeed correct. I've seen a few mistakes of stuff listed on the Internet. Good luck

**nsb29** · 08-17-2016, 08:36 AM

get out your multimeter it would probably be quicker than trying to trace it down with a diagram and more accurate

65Gregg · 08-17-2016, 09:50 AM

^^^^thats how I did it

ls1nova71 · 08-17-2016, 10:02 AM

Not sure how you could have labeled all the pink wires and only had two injector wires, there should be eight of them, they each have their own power wire in a truck harness. You can tie them together if you want. I usually tie all four lefts and all four rights together and have two fuses.

**michael bustamante** · 08-17-2016, 11:08 AM

yeah thatas what i was wondering too but if you look at the pinout diagram on lt1 swap it only lists 1 prong as 2 and 4. i was just hoping that you guys would know which other prongs are the injectors as the harness is off the engine and not in veh. (in my lliving room)
and i dont know which injector plug is which and not how how to apply poer to id wire so ill have to trace them

08-16-2016, 06:01 PM	#1
michael bustamante Senior Member Join Date: Sep 2007 Location: Albuquerque NM Posts: 7,867	modifying a stock harness 2003 yukon 5.3 2wd dbw i cut off the plug for the fusebox and i labeled all the pink wires per the instructions on lt1swap.com problem is the only pink injector wires labeled are the #2 and 4 which is E5 which pinks are the other fuel injectors? __________________ 1967custom Last edited by michael bustamante; 08-16-2016 at 06:10 PM.

08-17-2016, 08:36 AM	#3
nsb29 Senior Member Join Date: Feb 2014 Location: new smyrna beach fl / 29 palms cal Posts: 1,727	Re: modifying a stock harness get out your multimeter it would probably be quicker than trying to trace it down with a diagram and more accurate

08-17-2016, 09:50 AM	#4
65Gregg Registered User Join Date: Jul 2006 Location: Willis, Texas Posts: 754	Re: modifying a stock harness ^^^^thats how I did it __________________ 65Gregg Blue long bed White TBSS 61 Impala “The two most important days in your life are the day you are born and the day you find out why.” Mark Twain

08-17-2016, 10:02 AM	#5
ls1nova71 Registered User Join Date: Dec 2009 Location: Independence Mo Posts: 4,119	Re: modifying a stock harness Not sure how you could have labeled all the pink wires and only had two injector wires, there should be eight of them, they each have their own power wire in a truck harness. You can tie them together if you want. I usually tie all four lefts and all four rights together and have two fuses. __________________ My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html

08-17-2016, 11:08 AM	#6
michael bustamante Senior Member Join Date: Sep 2007 Location: Albuquerque NM Posts: 7,867	Re: modifying a stock harness yeah thatas what i was wondering too but if you look at the pinout diagram on lt1 swap it only lists 1 prong as 2 and 4. i was just hoping that you guys would know which other prongs are the injectors as the harness is off the engine and not in veh. (in my lliving room) and i dont know which injector plug is which and not how how to apply poer to id wire so ill have to trace them __________________ 1967custom

08-16-2016, 10:44 PM	#2
dec010974 Senior Member Join Date: Oct 2012 Location: Miami, Florida Posts: 965	Re: modifying a stock harness I don't have a schematic in front of me, but you should be able to trace the wires back to the injectors. At least that's what I do. I like the assurance that the schematics I read are indeed correct. I've seen a few mistakes of stuff listed on the Internet. Good luck



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