02 senser "signal wire"
 

Can Someome with a shop manual or anyone who knows please tell me which of the four wires that is coming out of the O2 senser is the "Signal Wire"
-Orange
-Blue/black
-Blue/pink
-Green/red
:D

blue and pink, i dont know if youre installing an Air fuel ratio guage but if you got a crappy guage it will affect your car, i got an Autotechnic guage and the car was crazy, i used an autometer one it and it was fine. just my advice.

Did you look this up or from finding it on your car? It would probably be the same color wire either way. Did you have the same colored wires as above?

i have a 1.6L protege same colors and everything, a guy with a turbo protege in my area told me which wire to tap into, you'll know if its the right one or wrong one from the readings on the air fuel guage

Thanx! :D

quick question for you guys with a/f gauges... is it normal for the led's to go blank when you let off the gas but it's still in gear just coasting? it reads fine when you're on the gas, or at idle.. but for some reason it goes blank when you just coast with it in gear... is this normal or is my gauge jacked? :)

it should only do that sometimes, i know with the autometer guage if your running extremely lean at times or rich at times, the led will not show up because your off the meter but its normal, as long as its not always like that

it does it when i let off the gas, but it's still in gear. the led is on, just very very faint. you can see its there at night, but it's dim. any other time, idle, cruising, etc it's fine. just when you give it gas and let off, it goes to that point. :|

the LED seems to go out because when you are coasting the a/f ratio goes so lean that it is off the scale. nothing to worry about, it's normal.

if you have a voltmeter the signal wire will be the only one reading 0-1 volts. the other wires will either be grounds or higher voltage.

Autometer A/F
 

Yea mine does the same it goes out when it just coasting, now that u have the same problem i'm assuming its normal..