Today I decided that I was going to finish installing my gauges. The Air/Fuel gauge requires me to tap into wire 12 on my ECU harness. Since there are about 5 wires that are green and white, I need to unplug the harness to identify the proper one. Yeah, right. How in the heck do you unplug it? I figured out the whole pull down on the metal lock thing, but I cannot get the plug off! Anyone have any input on how to unplug it?

 

well, #12 goes to the front oxygen sensor, so couldnt you tap into that?

 

dude there is a screw at one end, and even after that you still gotta be patient and firm yet gentle all you're ripping on it, I did mine just last week.

 

Yeah, I removed the screw, pulled down on the metal hook thing and still can't get it to come all the way off. It seems like it is hung up on the screw side. The wire is green with a white stripe correct? Can you tell me what other color wires it is next to? I found about 5 green with white stripe wires, doh!

 

i wouldnt go by this, more of just to see if im right. it looks like the green/white#12 wire is sandwhiched between a brown#11 wire, and a grren/black#13 wire. it should be underneath a brown #40 wire and a yellow #39 wire.

 

Gives me an idea of where to look. Like I said, I can't get the dang plug out of the ECU...

 

would you even need to take it out? couldnt you just cut the tape around the wires and tap in there. i've never looked at the thing so I have no idea.

 

You can, but like I said, there are about 5 wires that are green with white stripe.

 

If all you're gonna do is tap an a/f gauge, then run a little more wire to the outside of the car. It was a pain getting the harness to come off. I don't remember what it was, but I think I broke it trying to get it off. I also never put the metal bracket back on. It holds tightly without it.

The pink wire is the one I tapped into. It will come directly from the sensor. I verified it by looking at the front O2 sensor wiring. Be sure to look at the harness side leading to the ECU and not the black/white sensor wiring.
*edit* Actually, the wiring will be different colors according to the year of the car. Sharkvelocity's 2000 had a yellow signal wire. :?

 

This is the diagram you want to look at. The left one is the front sensor. Pin #12 is the signal.