HELP! which oxygen sensor wire?

[jared_blown5.0]

First off i have a 94 mustang gt, and i got a autometer air fuel ratio gaue. It says to splice into the sensor signal wire. My question is which one out of the 4 is the signal wire. The colors of the wires are red, black, gray&yellow, and gray. Which is the signal, Thanks in advance guys

 

[95strokerPSU]

First of all, where are you actually trying to splice at? Not under the car right? You can splice in right by the computer. I'm not at home to look up the wire color but I'm sure someone else will chime in.

 

[urban96]

i dont know offhand but if you go to the autometer website itll tell you on there