O2 Sensor Connections
I have a problem trying to hook up an Universal O2 sensor to the Ford Factory wires.
I have the wiring diagrams from Ford but I can't tell which wire is for the Signal, Ground, and Heaters (2).
The factory wire colors are:
The wiring diagram says the Red/White and the Grey/Light Blue wires connect directly to the PCM
The Orange wire goes to what appears to be a common (distribution) point where multiple other sensors* interact
*Throttle Position Sensor, Engine Coolent Temp Sensor, Intake Air Temp Sensor, Diff Press Feedback EGR Sensor
The Light Blue/Orange wire goes to the Battery Junction Box then the PCM Power Relay. This would lead me to assume the LB/O wire is the signal wire but I don't know the rest.
Would it be safe to assume the two heater wires are the ones coming from the PCM and the Ground is the one going to the common point mentioned above...there is not a "ground" symbol so I don't now for sure if this is a ground or not.