my crazy O2 sensor vs. a/f gauge

[bivery]

my pro has what i believe is a semi different O2 sensor wiring. where as most 1st gens have a one wire O2 sensor mine has a four wire O2 sensor. I am trying to hook up my af gauge signal wire directly off the O2 sensor but which of the four wires is the signal.

and i know that the car does not have a 2nd gen Bp (in which all 02 sensors are 4 wire). The haynes does not have the wiring diagram for the 4 wire 1st gen. and i dont want to guess and check and mess up something somehow.

[charles]

What year is your Protege?

[bivery]

94

[charles]

http://www.wihandyman.com/forum/show...ghlight=4-wire

Maybe you have a Ford BP.

Edit: Or maybe the 94s are different.

There is only one signal wire though, the others are grounds or heater wires.

[bivery]

unfortunately i dont know which is the signal, the guy in the thread semmed to be doing some random guesses, but the wires the egt guy described are just like mine.
(my friend with an egt only has a single wire O2)