O2 sensors

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Jul 6, 2012 | 07:00 AM

kainedogg

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O2 sensors

In the midst of butchering my '99-03 wiring harness and am trying to figure out what type of sensors they take and why the wire on the right has 3 wires where as the one on the left has 4; with the beige wire splitting in 2 and going to God knows where.

Jul 6, 2012 | 09:35 AM

Old Geezer

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From: GA, USA

First: Check the beige wire at the splice, to see if there's continuity over to the like wire on the other sensor.

Jul 6, 2012 | 10:44 PM

LS1MCSS

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From: Dover, Arkansas

It looks like someone else already did some butchering on that harness. What is it out of?

Jul 8, 2012 | 08:58 AM

kainedogg

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...I believe it is out of a 99-03 truck...not sure buddy gave it to me. After looking it over the connector on the right has a purple\white wire cut from it. Anyone know what pin on the ecm it goes to?

Jul 8, 2012 | 08:59 AM

kainedogg

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Quote:

Originally Posted by Old Geezer

First: Check the beige wire at the splice, to see if there's continuity over to the like wire on the other sensor.

No continuity. I am half ready to buy a harness and start over.

Jul 8, 2012 | 10:02 AM

spot_55

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From: Fairview , MO

It goes to either pin 68 or 69 on the blue pcm connector. depending on if it is bank 1 sensor 1 or bank 1 sensor 2. hope this helps.

Jul 8, 2012 | 05:15 PM

LS1MCSS

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Quote:

Originally Posted by kainedogg

No continuity. I am half ready to buy a harness and start over.

I'll finish it for you, for a small fee. Or if you're close to me, bring it to my place and I'll help you do it.

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Jul 8, 2012 | 09:09 PM

LSCha0s

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From: Houston

I still have the rear O2 connectors I took off of my 99 Camaro harness let me know if you want them the colors wont match exactly but they will work.. I'm not sure if the PCM you are using is the same if they are they wire like this.

Bank 1 Sensor 1 is drivers side 02 Bank 2 Sensor 1 is pass.
The black wires are ground and the pink 12V switched.

These go to Blue connector.
26 TAN HO2S Low Signal [Bank 2 Sensor 1]

29 TAN/WHT HO2S Low Signal [Bank 1 Sensor 1]

66 PPL HO2S High Signal [Bank 2 Sensor 1]

69 PPL/WHT HO2S High Signal [Bank 1 Sensor 1]

Bank 1 Sensor 2 and Bank 2 Sensor 2 are not needed and can be tuned out.

Last edited by LSCha0s; Jul 11, 2012 at 07:36 AM.