Looks like Grey, White, Green, Black
Thanks for adding me.

So I run over something and it ripped the harness and plug, wiring to my 02 sensor. I need wiring info so I can rig it back up.

My upstream 02 sensor is not in the exhaust manifold, but after the manifold and in the exhaust directly above the axle.

Thanks in advance

 

Bump

 

 

Not understanding that. I have a Grey wire which is larger than the other 3 wires, then green, white, black. I would really like a picture showing the location of the wires in the Male plug (harness side)

 

My diagrams show stock wire colors for the 99 Civic primary O2 sensor as well as the stock wire colors for the 99 Civic O2 sensor wire harness connector.

Post pictures of the wires in your primary O2 sensor wire harness connector.

 

On the 99, the harness side its a male adapter, on the 02 sensor its a female.

 

The first picture that started this thread is of the harness side. The second picture is of the 02 Sensor side.

 

I don't see a second picture.

Non stock wires...use a multimeter to test which ECU pin or fuse 15 that each wire runs to.

 

I think its waiting on a moderator to approve the pic. I just posted it a few minutes ago.

 

Not a problem. Does it show the same wire colors as the 1st pic?

 

No it doesn't

 

What are the four wire colors (main color and stripe)?

 

Looking at the 02 sensor plug where the wires go into the back: Top left: Grey, Top Right: Black, Both bottom are White

 

See post #7.

Start by turning key to ON(II) [engine off] and testing all 4 wires for voltage to body ground. The one with battery voltage runs to fuse 15 for the heater element.

The remaining three wires run to the ECU. Use continuity checks at ECU pins indicated in diagrams to identify them.

 

I need a picture of the original wire positions to the plug. I'll never figure out the wiring otherwise.

 

Seriously? The diagram clearly states the connector view is from the wire side of the female terminals. If you can't figure that out, I can't help you further. You now have all information needed to answer the questions in your first post.

Let the brain engage.

 

The female connector is on the 02 sensor. Honda used the same connectors, but for the 99-00 they switched sides, for whatever reason, but yeah seriously.....I need a pic of the wires going into the harness side of the Male connector. Thanks

 

Seriously, you'll be able to figure it out without spoon feeding. Just force your brain to engage. Look up mirror image on internet. If you can make a forum post, then you still have just enough brain function.

 

Appreciate the vote of confidence, or worthless sarcasm....the fact is that I CANNOT READ THE SCHEMATIC ON MY PHONE WHATSOEVER.......and for whatever reason I can't load the page on my computer either. Thanks again. I thought someone here would actually have a 99-00 civic ex and/or would know the answers. It is what it is. The schematic you posted is way too blurry for me to read.

 

What the OP is not seeing is that the grey wire isn't really a grey wire, its a grounded insulator that covers the white wire inside of it. If OP wants he can peel it back a bit and see for himself.

 

I was just about to say the same thing. The OP simply isn't aware that the primary O2 signal wire is shielded... so you actually have a white wire inside a thin steel mesh inside a grey outer protective sheath.