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This is what I have come up with for wiring the Greddy unit. Please read my D17 Wiring for the ECU wiring locations. The numbers go as follows

1 = first harness
2 = second harness
3 = third harness
4 = fourth harness

example:

1-28 = Harness 1 number 28

Let me know if there are any mistakes as I'm going to try installing this beast tomorrow.

 
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1

 
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2

 
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woooow-

 
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well done let me know how it works out, ill b doing this soon. once the turbo gets put on. omg sorry i get excited when i think about the turbo thats about to go on the civ.

 
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Good info, I will be boosting here soon and need it, thanks guys!

 
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Quick Update for you guys. I think the ignition wiring is backwards. Just switch it and I think you'll be good.

 
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What do you mean backwards? Sorry I just got my emanage and I look at all this harnessing and I get a lil overwhelmed....besides my turbo kit so far is lost in the mail, sickening huh?

 
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corrected ignition wiring... Had the in / outs backwards...

I wonder why this never made it into the DIY section.....

 
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so this should be all the same on a LX minus the vtec wires?

 
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tnaaf,

Yes, it should be identical except for the vtec. I wen't off of the pinouts that 7thgen has for 01-03 listed in the DIY section. Just applied it to the wiring diagram for the greddy and made it easier to read.

 
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also stinky, I was looking at the Main harness instructions, do I cut any of the wire and make my connection and the continue the wire on the out put side or just sauder with an exposed part of the wire to make the connection? God I hate learning new stuff lol ANXIETY! lol

 
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With the power, ground and RPM, you would use a wire splice. all the rest you would cut and crimp onto one of the male / female wire ends. All of the ones that show a continous wire, are not cut. All of the ones that show a break in the wire are cut.