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High or Low signal wire from O2 sensor
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mangomills Offline
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High or Low signal wire from O2 sensor
I'm working with a GMC Sierra 4x4, 4.8ltr and am about to hook up the dual efie but see on the wiring diagram that there is a High signal wire and low signal wire that come from the O2 sensor to the PCM. Which one should I hook up to? I would think the high signal wire, as the color of the low signal wire is the same for all four sensors.
Anyone know for sure?
06-13-2008 09:04 AM
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mike Offline
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RE: High or Low signal wire from O2 sensor
High signal wire. The low signal wire is just a ground wire.

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06-14-2008 12:59 AM
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