Air/fuel ratio gauge

[All_Mighty_Bear]

I need help locating the signal wire on the wiring on the O2 sensor

[KLAS]

if your sensor has 2 white, one black, and one grey wire, the signal is the black wire.

[All_Mighty_Bear]

if your sensor has 2 white, one black, and one grey wire, the signal is the black wire.

thanks bro ive done it now but thank you