Please Read I need the help. I know its long!

Well the right O2 sensor on my 95Z is throwing a code. I used Datamaster to scan it and I believe its 63. Its the Right O2 sensor is lean. So I've been chasing this down for a few days and its been driving me nuts.

I had pacesetters installed and instead of using a proper extension the mechanic spliced and shrink wrapped the wires to extend them. I did some datalogging and found out that my O2's were bad so I replaced them and they worked fine.

Over time though I guess some water or whatever caused the right one to stop working. I got under the car and pulled back all of the wires but I didn't make note of which wire is which (STUPID I know). So now I have an O2 with a purple, a tan, and two brown wires. On the pcm side I've got 3 identical white wires and a tan wire.

Which wire goes where? I used a multimeter to test the voltage of the wires. One wire had a voltage of 1.xxV (high voltage) so I put it to purple on the O2, the other had a voltage of 0.8xx (low voltage) so I put that to tan. The other two wires appeared to be grounds so I put one to each brown wire. This did not work.

As far as I understand it should work like this

Purple to High Voltage wire
Tan to Low Voltage wire
Brown to ground
Brown to +12V

Now like i said I didn't see a +12V only two grounds??? And the O2 has two brown wires so which is what then?

I really appreciate the help. And FWIW I'd never splice the O2's the muffler shop did this. And for anyone else just buy the extentions. Trust me its worth the $$$ not to deal with this.

Thanks.

 

Shoebox has the wiring diagrams for the 95 on his website. The colors of the wires on the O2 sensor and harness are clearly shown on the diagram:

http://shbox.com/1/1995_pcm2.jpg

 

Thanks I've looked at that pic before. Purple to High Voltage, Tan to Low Voltage, No problem there.

My O2 has two brown wires. Which of the Brown is +12V and which the ground? Any tricks to figuring that out with a multimeter. I know these wires are for the heater.

Also on the pcm side both of the other wires seem to be grounds but I'm going to try the using the exhaust as a ground and see which one is +12V.

Thanks for the help.