I am looking to install an air/fuel guage in my car. The problem lies in the oxygen sensor:

1. There are four wires connected to it -- which wire is the high
side?
2. What is the voltage -- 0-1 VDC or 0-5 VDC?

Any help would be greatly appreciated.

 

I can't remember the exact wire but just get a voltmeter from Wal-mart and find the wire that runs between 0-1V and there you have it and the voltmeter will come in handy in the future too trust me.