Hi, i have a LM1 wb02 with the display, i need to tie the unit into my aem ems, and im having some trouble figuring out which wire is the 0-5v reference signal coming from the 02 sensor.

it has 5 wires, so far i have found gnd, 12v+, and 3 other wires, one i was getting 8.7ishV, 2.3ishV, and 2.7ishV all around 14.5:1 AFR.

If anyone could help me out as to which wire is the signal wire, that would be great.

Thanks alot.