Sorry I thought that was of the a/f gauge not the sensor.

oh, ha I read it wrong.

http://www.madracki.com/miata/images/wiring/96sys.pdf

OK, I went over the wiring diagram but am still unsure where to get the signal from? Sorry for being dumb.

just tap your o2 sensor.

the purple wire off the o2 sensor?

if your o2 sensor wire is purple yea, but my stock o2 sensor wire was black.... the autometer gauge wire for the o2 pick up is purple.

so you want to tap you purple wire from the a/f gauge into the black o2 sensor wire.

Scott

problem is the 4 wire sensor, dunno exactly which wire to source from.

OK it's in and I think it's working. Is it really suposed to do the light show thing during regular driving? It only seems to work under boost. Kind of lame.