i have a a/f gauge and i was looking through my maintenance book trying to find out wich wire is the signal wire coming from the o2 sensor. there are four wires. does anybody know which one it is off hand? thanks in advance.

I pretty sure that it is the solid white wire (no stripe).

Can anyone confirm this?

HTH,
BP

The wire will either be white OR white/red stripe. I know this for a fact.