Originally Posted by sloppymax

one white is power, one white is heater, grey is ground and black is signal. you will have to test with a voltmeter to see which is power.

Originally Posted by BlackBIRDVQ

This should work on all Cali spec 00-01 Maximas with the 4 02 sensors infront of the front valve cover, might also apply to the 02-03 Maximas.
www.o2simulator.com - when removing precats or main cat, the check engine light will come on with codes P0420 and P0430. This little 30 dollar box helps you keep your car check engine light free. Rear 02 sensors monitor if the cats work, they do not affect the long or short trim fuel- basically doesn't affect drivability or air to fuel ratio. ECU just looks for working cats, and this fools it into thinkin the cats are in place.

*White Wire on the Simulator goes with the white wire on the Oxygen sensor harness- this wire is the signal wire that the Simulator modifies- leave the wire from the 02 disconnected- let the simulator fool the ECU.
*Black wire goes with Black Wire- this is the Ground
*Pink wire on the simlulator goes with the Red and yellow wire on the vehicles harness.
*Red and Blue wire is unused by the simulator, nor is the Pink and Black on the other oxygen sensor- these are for the oxygen sensor heaters. Disconnecting these will throw a check engine light for Heater circuit maulfunction.

When I install these O2 simulators I connect them directly to the harness on the car, but BEFORE the oxygen sensor harness connectors. The wire colors change to 2 whites and one black and one gray after the connector- and they go right into the oxygen sensor like that. They are thinner gauge too which makes for a hard install. I have been asked mannny times by folks on the forum, which wires to tap into, so today while putting on my Blizzaks for the winter I just quickly wrote down the colors and wires so I can post it here. You will have 2 white wires on the DUAL version of the simulator- which I recomend you guys get when doing headers, since 2 cats will be eliminated and it will trip a check engine light for eighter one. Just cut the one white wire on the other oxygen sensor singal wire, and splice in the 2nd white O2 simulator wire to that oxygen sensor's wire harness. The Simulator takes power that runs into the oxygen sensor- which is called refference voltage. It modifies it into voltage that is read by the ECU as GOOD WORKING CAT, and thats how it all works. If still confused, look at your cars wires, tell me what you got and I will try to help ya out.

Originally Posted by sloppymax

one white is power, one white is heater, grey is ground and black is signal. you will have to test with a voltmeter to see which is power.

Originally Posted by killer924007

I pm black already..!!! he said he is going to take some pictures for the details..

Originally Posted by PTNR

this is not right.

according to BlackBIRDVQ and O2 simulator wiring diagram; White is signal, red/black is +12 and black is ground. if you ordered the unit with two white wires, which you should have, the second white wire is for the second O2 sensor's signal wire. you DO NOT disconnect the heater wires.

also, BlackBIRDVQ recommends connecting BEFORE the oxygen sensor harness connectors where the colors of the car's wiring is different from that AFTER the O2 harness connector. maybe this is where your confusion lies.

i would still PM BlackBIRDVQ because he knows the most about the specifics. maybe he can walk you through.

Originally Posted by BlackBIRDVQ

I'm at home now, got the day off I will go outside and snap a picture of the wires, I don't bother making the install too clean cause I was experimenting with stuff there. I will make a clean install one day.....when I get around to it. I'm lazzy with working on my own car- took me 3 months to finally do my clutch, and it only takes like a hour to do that.

Originally Posted by sloppymax

what i quoted was the wiring breakdown for the oem o2 sensor. they send a breakdown of the simulator so why would someone ask for that? i have no confussion to speak of. i had the simulator installed and working correctly for a while.

Originally Posted by sloppymax

one white is power, one white is heater, grey is ground and black is signal. you will have to test with a voltmeter to see which is power.

Originally Posted by PTNR

i meant killer924007's confusion, not that you were confused.

i misread your post thinking it was the simulator's wires that you were describing. the only thing i was trying to convey is that the wire colors before the harness are different from those after the harness. depends where you decide to splice. you have to test the wires to find the correct wire where there are two white wires.

btw, where did you splice yours?