Question about 2000 Cadillac Seville

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Oxygen sensors for a 2000 seville wiring chart on original fatcory equipment the oxygen sensors have 4 wires which are black,black,blue, and white. each wire does a differant thing, like heater,or sensor,or ground

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  • hargos195928 Jul 27, 2010

    Jul 27, 2010 - there are 4 wires that come out of the oxygen sensor 2 of them are black, one is blue, and the other is white. each wire has a specific purpose for its use when plugged into the harness for the computer. it measures oxygen in the exhaust system, another wire may be a ground wire, another may be a heater . what i need to know is what each wire is for. example would be the white wire is for the heater

  • hargos195928 Jul 28, 2010

    yes-

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  • Cadillac Master
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The color code that ypu are mentioned, is refer to DENSO O2 models...
BLACK -->> Heater
BLACK -->> Heater
BLUE -->> Signal +
WHITE -->> Signal -

Other details can find in the next diagram (click for zoom)...

oxygen sensors for a 2000 seville wiring chart - 8515ca5.jpg

and HERE... 467494c.jpeg

Tell us news.

Posted on Jul 27, 2010

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  • Master
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I am having trouble understanding what your question is. If you could possibly re-word your question I would be happy to assist you further.
Thank you,
Lee

Posted on Jul 27, 2010

  • hargos195928 Jul 27, 2010

    there are 4 wires that come out of the oxygen sensor 2 of them are black, one is blue, and the other is white. each wire has a specific purpose for its use when plugged into the harness for the computer. it measures oxygen in the exhaust system, another wire may be a ground wire, another may be a heater . what i need to know is what each wire is for. example would be the white wire is for the heater

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1 Answer

I have a 1993 mercury villager my o2 sensor has 2 blues a white and a black and the wiring on the van has a black red and white and i need to know what way to wire them


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You have an heated Oxygen sensor. 2 of the wires heat up the sensor and keep it at a certain temperature, it is turned on and off by the computer. The other 2 are use to send a very low voltage reading back to the computer to tell the computer if the engine is running rich or lean. I don't have a diagram to tell you which wire does what but you can get a manual and that should give you the information that you need and tell you how to trouble shoot it to tell if the sensor is bad or not, you may want to look for a wire laying on the exhaust, I have found wires burnt and lay on the metal.

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