which pin would the signal for the a/f ratio signal(o2) would i hook my friends guage up to?he has the jdm h22a with the 4 plug ecu..and for a turbo timer i hooked up the vss wire but it doesnt work could this be wrong..it siad orange but the pin had a black n red one in its space??

 

Get a wiring diagram (Helms manual)