my car is a 05 Z,can anyone help me find out which is the 12V,and ground,and singal..??????i find out the wires on both o2 sensor,are 2 white, 1 gray,1 balck??????????????????
it makes me confuse...not, red/black,org/black,and black???

o2simulator is from this site...
http://www.o2simulator.com/24803.html

 

First get to the o2sensor and identify the Ground,+12 and Signal wires.
Most common wiring color coding: Black-Gray-White-White.

Gray - Ground.
Black - Signal.
one of the White wires - +12v.

Connect o2sim Black to o2sensor Gray. It is important to connect o2sim to the o2sensor circuit ground and not o2sensor heater ground.

Connect o2sim White to o2sensor Black. Cut the black wire so the signal from o2sim go to the ECU and not the sensor.
For dual application connect second o2sim white wire to second o2sensor following above steps.

Connect o2sim Red to one of White wires. DO NOT splice two o2sensor White wire together. Those are heater circuit ,one wire is ground and other is +12v.
If the internal o2sim LED does not blink (once in 2-3 seconds) then connect o2sim Red to the other White wire.

That is it.
Consult your car wiring diagram to identify proper wires.