Im hooking up a Air/Fuel Ratio guage, need help.

[modifierLE]

I have a 2003 Toyota Camry, 4cyl LE.

I want to install a Air-Fuel Ratio Guage and need too know wich wire on the oxygen sensor is the right one. If i can remember there is two black wires and one white one, and there is another one there that i do not kno the color.

Does anyone know witch wire is the sensor wire?

Im looking at the 02 sensor coming from the exhaust manifold in the engine compartment.

[Hamsterman]

in my gen 4, it was the blue wire... which should be this wire you see that is not white or black...

i had a v6- which shouldn't change things, but the off colored wire is pretty much for sure the sender wire