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Repin ECU Harness Connector (Alternative Method)

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45:15
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Budget Turbo Yukon XL 4L80 Conversion (Part 4): THE WIRING CONVERSION LIFE HACK! The BEST Way!

What happens here

An alternative wiring method involves modifying the ECU connector directly. Remove the brown wire from Pin 2 of the green/red PCM connector and the white wire from Pin 79 of the blue PCM connector. Then, insert the white wire into Pin 2 of the green/red connector. This method eliminates the need for additional wiring harnesses or running new wires through the vehicle's frame, offering a cleaner installation.

Goal: Modify the pin configuration of the ECU harness without new wires

Tools and materials

  • Small Pick / Jeweler's Screwdriver — Releasing the lock tabs on the pins
  • Wiring Diagram PerformanceTrucks.net — Identifying correct pins and their new locations

What they say

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the pin clips to move things around so we're going to do this way since we're in here and this is easy when it says remove brown wire from pin two of the in this case green pcm connector i have the green one with the thing you popped off already there's just two little clips you gotta poke in here no big deal but what does it say what it means pin two the numbers are actually cast on the back here i don't know if the gopro can focus on that or not but like here you have one two three four you know you see all the numbers there some of them have crud on them from pennsylvania life but uh pin two is this brown one right here that's the one we gotta take out and move over it says remove the brown wire from pin two yeah pin two is just like the whole location so we we move it from spot to white wire from pin 79 goes into pin two pin 79 of the blue connector so we have to take this one apart too and then move one of these over to here so we're going to have a rogue wire going from one loom to the other which is fine but we also have to take that one apart then we're back from fart break back there cracking up you can't see but she's like silent laughing right now so here's the little pin thingy that we have to lift up to pop this out these ones are a lot easier to get to you just kind of hold it up and then you know pull on it okay so you don't actually have to pull that black thing out i'm just stupid and this one was stuck it just needs a little bit more um aggression so that is removed now we're gonna remove the white wire from pin 79 which would be on this one 79 yep right there that's what we're gonna pull out so we gotta pop this connector out of here this is what i was talking about it's just that i was able to do it with one hand so it can't be that hard wow i'm good pop pin 79 out right there so just needed to hold it up and push it a little bit harder i guess wiggle it a little bit now this one should just come right out the back yep see there we go and this is the one see i look at this 9 000 times just to make sure it's white right i'm looking at the word white that's why i said that pin 79 of the blue connector insert into position 2 of the green connector so to give us a little bit more room to work with here i'm gonna finagle this thing out of its tangle just a little bit more see what clips the pins in is this little flange here a little plastic

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