Digi2 o2 sensor woes

[mikinoz]

So I am not the best yet with reading wiring diagrams, but the situation I have is...

The MK1 has a MK2 digifant 2 loom in it with all of the connections to the devices being spliced on at the time the engine went in.

I was going to install a wideband o2 gauge yesterday and simply could not get the right feeds (earth, 12v+, signal) from the wiring harness that led to the existing o2 sensor. More and more invetigation leads to me being a bit bewildered, so I decided best to trace back to the splice and start again.

What I found were these...

Brown/Black wire, Red/White wire and what looks to be a black thicker cable.



So headed to the trusty Bentley and found the diagram.



It says I should have a Brown/Black wire, Red/White wire and a Green signal wire.



In this diagram it states there is a wire that intersects from the block to the Green signal wire, but I am really confused about this. From the diagram, is it simply spliced to it? Is there something going on that I am missing?

Any advice appreciated.

[mikinoz]

Ok, so the deal is the signal wire is shielded and the earth is connected to the sheath. Learn something every day right!