O2 Sensor Signal Wire
I was installing my air/fuel ratio guage today, and I can't really figure out which wire is the signal wire from my o2 sensor. There is four wires there and I am not sure which wire is the one that goes to the PCM (Powertrain Control Module)....
If anybody has any info on this plz let me know. |
if there is only 4, is there harm if u try them all. This is just a stupid suggestion cause i do not know if you can mess something up.
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if you have a heated o2 (4wire o2) then you have 2 grounds, a signal and a power wire. I would use a multi-meter and probe the 2 non-ground wires (should be the same color). have someone rev the car up will probing each of the leads...which ever one varies the voltage (0-5v iirc) that's your signal wire.
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There is 2white(ground), 1grey(heated), and 1black(signal) before the bracket or a converter. After the converter, there is 4 different wires with all different colors. I tried connecting it to the black(signal) wire, and one of the wires on the same spot, but the opposite side of the black(signal) wire(its white with something). When I probed it, it kept getting crazy signals going up and down and not really working correctly... Any suggestions?
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PS. good luck with the SouthEast Meet in Alabama, sorry cant be there Roddimus Prime
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