Hello! There are four O2's...Each O2 heater, left and right bank, front and rear, has it's own wire colors...These colors are "at the connector"...First series are the control ground sent by the PCM..
RR=White/Black...RF=Red/White...LR=Tan/Yellow...And LF=Yellow/Light Blue...........This series are the battery leads, hot when fuel pump relay pulls...RR=Violet/White...
RF=Red/Yellow...LR=Violet/White...LF=Red/Yellow...
If you have any questions feel free to ask...Guru...Saailer
I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867
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