What color is this wire on an 87 TII?

The Hayes manual says its Gy, which is green w/ yellow stripe. But I hooked up my AFG to that wire and now the gauge goes crazy when I turn on the Left Blinker! It looks cool, but doesnt help me with my AF Mixture much.

I realize that many if you arent keen on the AFG but I'd appreciate helpful replies ONLY. I already have the gauge and just want it to work properly.

Thanks

 

Has anyone hooked up an AFG before?

What wire does it hook up to?

Is it directly off the cpu, or is there a better place to hook the gauge to?

 

s4/s5 turbo or non turbo?

 

S4 TII

 

On mine it is a green wire. Where did you hook it up. By the CPU, or the bac valve?

 

By the CPU, next to the fuse box.

Is that where you hooked it up?

A green wire huh? How did you know that was the right wire? The manual said green with yellow stripe.

 

I was feeling generous cause I'm home sick with the flu....

 

GY = O2 sensor
G = intake air temperature sensor (dynamic chamber)

 

See, I hooked it up to Gy, and it doesnt work, its some how reading my Left Blinker signal.




I will try finding 2D directly instead of a wire color. Thanks, hope you feel better!

 

The Turn Cancel System has a G/Y wire. Maybe you used that or something. 50-60 FSM

 

Ya, funny how I tapped into that one. Thanks for the help, I'll play with this when I get home tonight.

and f1blueRx7, That Diagram is a big help as well!

 

So that is what you did?

 

ya, must've. how else would the blinker be affecting the AFG?

So I suppose there are multilpe Gy wires. Thats a little confising!

 

Well, the O2 is GY, the Turn Cancel System is G/Y. Confusing... yes. But, there's only so many colors they can use.

 

So what's the difference between GY and G/Y?

Does G/Y have a band around the wire rather than a stripe down it?

 

Don't you want the ECU in the passenger footwell and not the CPU by the fuse block?

The CPU does turn signals and the ECU does fuel control.

 

Have you hooked up a AFG? If so, did you use the passenger side ECU?

Maybe thats where my problem lies...

 

I just spliced into the wire coming off of the O2 sensor in the engine bay.

 

I suppose that would be the most direct route!! HA

I was already tearin into the fuse box to add a slot for the gauge lights. (I hooked up 3 new gauges.) So that's why I tried to find the wire inside the car.

Plus it keeps the engine bay a little neater. If all else fails I may go for the wire off the o2 sensor, but I'd really like to get it done inside.

Thanks

 

Your at the wrong side of the car there homie. You need to be over on the passenger side at the ECU. Take the door sill out and pull the carpet back. Then take the metal cover off and you will see the ECU. It should work fine after that.

 

The O2 wire is the a gray shielded wire. For most of it's lengh, it is covered by a shield of braided wire with a gray jacket. So if you make your connection anywhere but at the ECU or at the sensor itself, you will get irratic readings as you have connected to the shield instead of the O2 sensor wire.

I've attached an image showing the common pins on the ECU. This image is not mine, it's been posted to the forum before.

 

Rock on! I'll take a look at that after work and post my results.

Thanks for all the helps peeps!

Kind of a N00B mistake, but gotta learn somehow.

I'll now go fall on my own sword

 

Thanks, It also seems I may be tring to connect to the CPU by the fuse box.

I've been advised to look over on the passenger side for the ECU.

 

Yeah, that would do it. While you are waiting, head up to the FAQ and download your copy of the Factory Service Manual.

 

Hrm yeah I posted my diagrams... sort of assuming you knew that the ECU is what handles Engine function like 02 etc. hehe.