Which wire to tap on for AF Ratio gauge

[gar_lei]

Hello

I bought a Prosport AF Ratio gauge (narrow band).
I would like to know where i need to tap my wire into please.

I have a MZ3 hatch 2009.
THANKS

[gar_lei]

please HELP!!!

[sol_searchin]

Narrow band AF gauges are useless, if you really want use of a AF guage get a wideband O2 and gauge.


red Wire-connect to a fused and switched 12V positive that is not constant
black Wire- ground it
purple/green/blue/pink/yellow Wire (whatever colour the 3rd wire is)- connect to O2 signal wire, and make sure you connect to the harness because the o2 wires are sometimes shielded. The wire you want to connect to on the o2 sensor is the one that is NOT white/black, pretty sure the mz3's have heated o2's so you will need a multi to check, PRETTY sure it's the green one but don't quote me.