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02 sensor wiring

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awdclipse

15+ Year Contributor
42
0
Dec 18, 2004
Germantown, Maryland
I'm trying to wire an 02 sensor and going off this diagram:
48046-o2-sensor-wiring-o2-sensor-schematic.jpg



dsc04021.jpg


I understand the White to blue and black to white, but of the sensor colors how do you know which of the black sensor wires go to #3's and 4? or does it not matter? Is there anyway to test.

Ive also read to put the two same colors together which would be the two blacks to two black, but the diagram shows otherwise. Any thoughts?
 
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