Looking to relocate wiring from passenger side upstream oxygen sensor on discovery series one. Thought it would be simple to tap into harness in more convenient location than behind engine. However, looks like all colored wires present at o2 plug in are not present in main harness. Does anyone have access to or idea where to find main wiring harness color coded diagram for main wire harness bundle from engine to ecu?

I would love to get this thing back up and running as I think I finally located my poor fuel mileage issue - only two leads into o2 sensor were plugged into pigtail. Two had apparently come loose from a prior o2 sensor replacement. Probably because it was so hard to get to in factory location.

 

Well, in your copy of the RAVE can be found the electrical maps. The two you need are attached. If your owned a D2, it would be in color. For D1, back to vintage black and white. There are letters beside each wire that tell the colors, like OK would mean Orange with pinK, etc. Color code list attached. These pages are from the 97 year diagrams, they have others for 95 and 96, may be some variation.

 

Thank you for wiring diagram! I think this may having fixed my excessive fuel consumption issues. I noticed fuel trim numbers at values much lower than threshold for once. This has been quite a learning experience for me with regards to o2 sensors and the necessity to check and double check wiring and connections. I'll follow up after a couple hundred miles with fuel mpg.