Thanks Nick, But unfortunatly that is little to no help! The black wire is the 12 volts, and then I have a brown, gray, andwhite wire. also, yj's only have 1 O2 sensor. so there is no down stream up stream!, just one big fuggin river! hehe
Also, you can't use a multi-meter (according to autometer) to test the difference between the sensor signal and the sensor ground. I guess it is not like a chassi ground, cause that is done through the sensor itself to the threaded bung in the down pipe. IDUNNO! I think I am gonna wire it up and just guess. if it doesn't work and I fry te guage, I will just buy another, then I am out $50. and wire it to the other wire!
Snitty, apparently. Another option would be to buy a autometer O2 sensor designed for carborated cars, and weld my own bung into the downpipe and wire it off that, but all those parts would cost me more than if I have to just buy another guage if I screw this one up.