Could I get someone with a M60 swap, or a M60 harness to confirm what wires go where on the o2 sensors? I think I may have mine wired up wrong, which is what might be causing my CEL for those. I am having a hell of a time finding a wiring diagram that shows what I'm looking for. I have 2 white, grey and black on the sensors, I know that the white wires are for the heater. The question is which color is suppose to be going to the other 2.
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Dumpster Fire Pilot -
Arent there any connectors on the harness or o2 sensors?
My harness has a small tag on the sheath for the right/ pass side o2 sensor
Did you try swapping connectors L/R ? Clean connectors ?
I had chk eng lt from this also -
My harness had the plugs cut off it, when the lazy fuck that removed the cats at the junk yard choose to cut them instead of unplugging them. I know which one is left and right, what I'm thinking now is I may have the actual 2 wires that go to the sensor portion backwards. I know I have the heaters right, but I am not sure with the other 2 wires. I don't want to risk swapping them, and having something fry because of it, assuming they are right now.Originally posted by 36brua View Post
I guess what I'm asking is which color wire hooks to the grey wire on the sensor, and which one hooks to the black. I know the whites are for the heater.Dumpster Fire PilotComment
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ooo no connectors that's helpfull..
my harness o2 connector are blk/yellow so blk/blk grey/yellow.
1993 740i... section 1362 eng control pg 1362-05 or PDF pg 135
hope this helpsComment
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Well, my black and yellow wires were backwards.Originally posted by 36brua View Postooo no connectors that's helpfull..
my harness o2 connector are blk/yellow so blk/blk grey/yellow.
1993 740i... section 1362 eng control pg 1362-05 or PDF pg 135
hope this helps
I cleared the codes, and it's still throwing 1221 and 1212.
Not sure what to check next....
Dumpster Fire PilotComment
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I will chk connectors this weekend to confirm my wiringComment
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