Fixing a 2nd gen 3sgte harness / preping for my swap, no, its not going in Jenns car, its going in MINE! ;) Options

[presure2]

so yea,
as most of ya know, we recently did up a 3rd gen swap for jim and as "payment" he gave me his 2nd gen setup.
as most of ya also know, this setup was originally RJB23's car, which was pretty much a mess from the day jim and shannon bought it.
Click me for details of that story

so once we got the 2nd gen motor up here, it has been sitting on a stand, waiting its turn.
i finally got around to getting the harness off, and am starting to get it cleaned, stripped, repaired, rerouted, rewrapped, and reloomed.
like everything else about the swap in that car, this engine harness was no diffrent, and in defense to the guy who did it (IIRC DGperformace did it) it did work, it was just routed and wrapped all crazy, and the ECU end basicly looked like a birds nest from people troubleshooting the ecu and wiring while it was in the car.
so i started tearing into it, and dustin came by last night and helped me get the interior plugs sorted out, since there was lots of "dead" (wires that go to nowhere) wires in the harness.
i also removed all the stuff i wont need or use, including all the ac stuff, TVIS, TVSV, ect.
once that was done, i went about cleaning and fixing any loose or broken wires, (there were a few, one of which wouldnt allow the car to start with the key...lmao) and rerouting and rewrapping it, getting it ready to be reloomed.
here are a few pics of how that is going.

first, the before. sorry for the blurry pic, its the only one i took..lol



this wire was in the harness that was routed behind the intake manifold, instead of inside of it, like it should be, and chaffed on the IM until it broke..just so happens this is the wire that tells the starter to crank. yes, jim, this really is why your car wouldnt start with the key! lmao



how the ECU side of the harness looks now:



and some of the leftovers:


and just for refrence, a pic of what a stock USDM 3s harness looks like, for an idea of what this one should look like when its done.


ill keep updating this thread and adding pics as i go along and continue with the project.

[Dr_Tweak]

Manny... to ditch the fuel pump relay, take the 3 blue wires and solder them together. Then you will have 1 wire left over (goes to the ecu), just wrap that up or remove it from the harness. The fuel pump relay should only be there if your going to use the resistor pack. If not, ditch it because it will end up sending full voltage through a really thin gauge wire and will end up burning out the realy.

It's easier than that actually. There should be one (factory) wire, blue/black, coming from the circuit opening relay going to one of the interior plug. FP (diagnostic block) is spliced into that. Just leave it all factory and don't touch it.

goddamnit i hate the way this harness was put together.

it made SO much more work for me, i basicly have to cut and rewire every wire in this harness because of how long it was.

art/tweak can you tell me what this power wire plug is for? its located at the starter plugs.

Yeah I noticed with a lot of the harnesses that were sent to me for repair (that DG originally did) that it seemed like he was matching up wire colors and didn't actually know what any of the wires did. For example, I saw a few times he had the ignition/injectors power wire connected to the starter, because on some 6GC harnesses the power wire is solid black. The effect, obviously, was that the car would crank as soon as the key was turned to the on position and keep cranking, but never start

You are correct about the JDM harness being long enough once you turn it back around, basically you end up needing to extend just a few plugs, like the igniter and AFM connectors.

That plug above is for the starter sub-harness on ST harnesses, it plugs into the wire that then goes to the starter (remember on the ST it's down below the intake manifold). Normally you would eliminate that plug.

I ran into something that I cant figure out. Plug EA1 has a blue wire on pin 16, yet I can't find any mention of what this wire is for in any of my books. Anyone have a clue what its does? It might be something year specific, and thats why its not in my book.

Sorry for jacking your thread with my own questions Manny. If its a problem, I can start a new one. Oh and thanks to this thread, you motivated me to start working on this thing. I was slacking...big time, but now that I started on it, Im actually having a lot of fun with it.

art, the blue wire is for the fan switch in the radiator in ST's.
for some reason it routes that way, the GT's dont.
ill post a pic in a few of what the harness looks like now.

my harness is routed just like a 5s harness now, art.

it starts at the diagnostics box, ignitor and coil (i moved the map sensor to the stock 5s location, then goes to the waterneck, then some wires go the the fuse box, the rest go up thru the manifold, and into the boot on the other side, just like a stock harness.

i had to cut and splice a few wires as i went, to get the rest of the wires to be able to "flip", then cut out all the extra wire out (which sucked because of how dave extended it, once i had it all going the right way.

That's correct on the blue wire, should be blue/black actually. Normally when I do a 3SGTE into an ST, I go to a GT radiator, get the GT fan switch, and then extend that wire down to connect to the stock GT fan switch in the bottom of the radiator. Then everything works just like factory

Thanks for the plug manny

-Doc

This post has been edited by Dr_Tweak: Dec 28, 2008 - 3:14 PM