O2 Sensor Wiring

[Smitty]

Need some technical help. I have an Air/Fuel ratio gauge that I'm trying to hook up to my truck. I bought headers with the bung for the O2 sensor and bought a 3 wire O2 sensor. I went to the junkyard and found the weather proof connector to hook into the sensor. The wires are marked A,B,C. I need to know the following:
1. Which wire is heater power?
2. Which wire is heater ground?
3. Which wire is the O2 sensor signal?
4. Can I just hook switched 12V power to the heater wire to make the heater operational when the engine is running?

Thanks for the help. This is one of the last things to hook-up before I try to start it up! /forums/images/graemlins/smile.gif /forums/images/graemlins/smile.gif /forums/images/graemlins/smile.gif /forums/images/graemlins/smile.gif

 

[Smitty]

Forgot to post the O2 wire colors

White
White
Black

 

[k20]

I believe black is the signal wire, and the 2 whites are the ground and power. It doesnt matter which is which as far as I recall.