I got a a/f gauge from a buddy of mine and was wondering exactly how you wire it. Its got three wires. I am guessing on for positive, one ground and one that goes to the O2 sensor but not sure. Does anyone have the specifics of how to wire this gauge?

 

Most gauges are wired the same. Red = Ignition, Black = Ground, Green = Source. What gauge do you have?

 

Air Fuel Ratio Gauge.

 

anyone?

 

Just like MRZ28HO said, red ignition, black ground and the third one goes to your o2 sensor. What brand gauge is it? Let me know how it works out because i'll be installing one soon.

 

Its a autometer gauge. I understand the red ignition black ground and the other one is purple so which wire on the O2 sensor does it go to?