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O2 low ref Q

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Old 06-05-2009, 01:05 AM
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Default O2 low ref Q

Looky here for diagram...

So the tan O2 low reference wires all converge into one and then branch out to the separate O2s. Does this mean if I'm striping the rear O2s out of the harness I can just pull those pins completely out of the pcm? Do I need to connect all the wires together or can I just one wire to each of the O2s?
Old 06-06-2009, 06:29 PM
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Bueller?

What do low ref wires do?
Old 06-06-2009, 08:52 PM
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Odd, when I stripped my truck harness, each O2 had separate HI (purple) and LO (tan) wires

Commons were IGN and GRD

If the rear O2s are tuned out theres no real reason to retain any of the wiring, or any drawback from some or all of it to remain
Old 06-07-2009, 12:15 AM
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Evidentally there are two styles of O2s used, ones with isolated grounds and case grounds (so says alldata). I guess I'll strip out the rears and just connect up the fronts together.



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