Post cat lambda, wiring missing, which colour wire does what?

[coolspot007007]

I bought my 172 with a decat already fitted, and the wiring in place for the pre cat lambda. I assumed the post cat wiring was tied out of the way somewhere but it has been cut near the exhaust manifold and I want to replace it but don't know which colours do what, am I right in thinking it's 2 for heater, 1 for sensor, 1 for earth?

 

[Dan519]

white = Heater
white = heater
Black = Signal
Grey = Earth

doesn't matter which white wire does what, it's not polarity sensitive

 

[rsshawn]

172 only has a pre-cat doesn't it?
Fairly sure 172 = pre-cat only and the 182 has pre and post. Not sure what the wiring you have found is if that's the case.

 

[Dan519]

no, it's only a handful of very early ph1's that had pre cat only

 

[rsshawn]

My apologies: found this topic whilst checking:
http://www.cliosport.net/forum/showthread.php?607491-Lambda-O2-Sensor-Change-Guide-(172)

Thanks for the "early 172 only" info 519