first off i need to know what wire is the signal wire on the 83 02 sensor. there 3 wires (2 white and 1 big green) i tried a voltometer and two wires fluctuate but neither has the the air/fuel ratio gauge reading when the car was warmed up for about 30 minutes. In the pic the middle gauge is the air/fuel gauge, to the right is the volt meter and to the left is my switch for the electric fans. Also if you noticed theres no radio, who needs it when you have the sound of the borla (its a sickness i say)

Lou
83 928 5speed

 

On my car, the O2 sensor has two whites and one black wire, and the black wire has the O2 voltage. So I would guess that your green wire is the one you want.

I never have the radio on when I driving my cars either as I'm mesmerized by the sound of the exhaust too; I just LOVE the sound of a V8!