air/ fuel gauge

[tony/ka24de]

I'm putting an air/fuelautometer gauge in my 1997 240sx. On the gauge there is three wires red(power),black(ground),and purple(signal) (Is this right?) Now , does anyone know which wire the purple one connects to on the O2 senser? there are three wires on the O2 senser.

[themadscientist]

Autometer digital gauge right? hook the signal wire to the O2 sensor wire on the computer.

the location for CA, RB, and SR are here;http://www.apexi-usa.com/produ...r.pdf

see if your KA computer jives with any of these.

[fiznat]

are you getting the signal directly from the O2 sensor or from the ECU? The ECU wire can be found with TMS's link, but if you're doing the wire from the O2 sensor, you can find the right wire by using a multimeter and finding the variable voltage one (while the car is running).

EDIT: sorry thats kinda vague. what I mean is use a multimeter and check the voltage of each of the 3 wires coming from the o2 sensor while the car is running. two of them should remain constant, but one (your signal wire) will vary slightly between 0.5 and 0.6 volts, and will change even more if you rev the car a little.