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66-96 Ford Broncos - Early & Full Size
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Zac PA

86 Bronco 2 O2 sensor wiring

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I have an 86 Bronco 2 that I would like to change the O2 sensor on but... the previous owner cut the stock wiring harness for the sensor and spliced in a something else, maybe a universal type. I don't know which wire corresponds to which. I talked to someone at NTK and they told me which wires are what on the new sensor but I don't know about the wiring on the Bronco 2. I have what appears to be (as best as I can tell) a Black, Yellow and Green wire to the O2 sensor. Any info on this would be great.

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Yo Zac,

Welcome!

Here it is, same wiring diagram as by Ford:

http://www.revbase.com/BBBMotor/Wd/DownloadPdf?id=26858

Gray/yellow from ignition switch

 

Dark Green/Purple to ECA (computer, aka EEC Module) Pink 29

 

Black/Light Green to Ground

 

More diagrams and Technical Service Bulletins (TSBs) at http://www.revbase.com/BBBMOTOR/Wd

 

GL!

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Thanks miesk5. Somehow I overlooked that diagram before, now I got it.

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Yo,

 

YW Zac!

BTW,

What engine and tranny/Xfer case,& major mods such as a Lift, etc. do you have?

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I have the 2.9L with automatic Trans. No mods, I just bought it recently

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Yo,

Ok, I added info that to your profile.

Also, as built transfer case is Borg Warner (BW) 1350 manual or electronic (shift-on-the-fly, aka ESOF) unless you have them 2wd model.

Front 4WD axle is Dana 28 TTB; rear axle is Ford 7.5"; firing order is 1-4-2-5-3-6;

distributor rotation is clockwise;

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