Puting in a autometer air Fuel guage. Wich wire is the signal wire on the O2 sensor?
Thanks

 

Good luck. I posted the same question and all I got was responses telling me they were not accurate and I needed to install a wideband.

 

At the Powertrain Control Module:
50pin black plug.
Pin 24 (red/light green)
or
Pin 25 (violet/light green)
Heated Oxygen Sensor signal wires.

 

Which 50 pin black plug? There is more than one. I do see a violet / light green wire in the top plug ( same plug with the VCC wire ), is that the correct one?

 

that sounds like it..it's the upper plug.

 

Spanks man. Much appreciated. One last annoying question. Any idea which sensor (s) this is for? Pre or post cat?

 

pm me your email and i'll send you over the diagrams (in pdf)

 

You have PM.


As a side note. I just tried both wires. The A/F gauge needle will jump when you hit the starter. Then will go dead for about 5 minutes. Then it starts working. Would think it has something to do with the cats being heated before the sensors operate. But it also does it after driving, turning the car off for a minute, then restarting.

But anyway, either of those two wires will do what they need to.

Thanks again for the help.

 

Does anyone have any photos? PDF's?

Jon

 

Is it normal for the gauge to not work until after 5 minutes? Will buying a seperate O2 sensor be a better idea?

Jon

 

I was looking around and found a photo showing the O2 sensor wire to splice into:

[attachmentid=41917]

Thanks hawgman.

Jon

 

I am doing this very thing....good idea? anyone let me know thanks Rob

 

I just installed one last week. I used Pin 28 in the powertrain conrol module. It is a gray wire with a light blue stripe. The gauge works perfectly which means the lights dance and that is about all it is good for.

 

I have this picture. Supose to be good info I got it elsewhere. That is the first plug at the ECM

Richard

 

No offense, but why waste your time installing this. Throw it up on Ebay and buy a Wideband.

 

Autometer makes nice wideband for the Cobalt and nexxus series gauges.