Hey everyone just in the process of installing an air/fuel gauge in the falcon but dunno which wire to splice onto on the back of the ecu. Was gonna splice into the O2 sensor but this has 2 o2 sensors and I wanna know when 1 fails. I've got a workshop manual but ill buggered if I can find an ecu diagram anywhere

what car?
what engine??

Haha that might help aye, lol. Ba xr8 mk2 2004 model