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Installing Air/fuel Ratio Gauge

Kennedy

By Kennedy,
in General Maintenance

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Kennedy Mentor

Kennedy

Posted
Posted

Hey Guys,

I've got a Autogauge A/F ratio gauge and wondering where I should connect the O2 sensor?

There are 3 wires coming from the 02 sensor (off the dump pipe). Should I bridge it onto one of these?

or

Between the O2 sensor and the firewall?

or in the car cabin, closer to the ecu?

Also, the I ended up getting those smoke gauges so I need a constant 12V connection to power it. What would be the best place ti find such a connection?

Any help woild be great

Cheers

Sam

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sidewazegtst Collaborator

sidewazegtst

Posted
Posted

Hey Sam,

Ok it's really easy. The red wire on your O2 is power, the black ground and the white is your signal wire. That's where you want to splice in to. Do not cut the wire, just peel back the cover and wrap your air/fuel gauge wire around it and tape the whole connection securely. As well do this prior to where the O2 sensor/wire harness connection is. That way when you have to change your O2 sensor you won't have to undo the wiring.

Now for a 12v switched power source you can splice in to your headlight controlls so when you turn your lights on at night, the gauges will dim like they are supposed to. Use a test light to locate that wire along with a good chasis ground and your all. The only wire that should be attatched to your O2 sensor is the signal wire from your gague.

I hope this helps out. ;)

Cheers B)

Kennedy Mentor

Kennedy

Posted
  • Author
Posted

Thanks for that sidewayz. Exatly what I needed. I've decided to to run the power from the car stereo as the gauge needs a constant (whole the car is on) 12V as the gauge is one of those smoked gauges that dissapear behind darkness when not powered.

Kennedy Mentor

Kennedy

Posted
  • Author
Posted

Ok we have a small issue

There is no Red/Black/Wire combo.

Coming out of my O2 sensore directly are 3 wires. Two white and one black

From the plug to to teh ECU after the plug (about 10cm up) the wires change colour to

Blue

Clear with brown wire

White with brown stripe

WTF?

It looks like mines been altered for whaever reason. Can someone please have a look at their sensor and tell me which wire on my O2 sensor wire combo corrosponds to the usual WHITE sensor wire please?

I'm assuming that the connections haven't changed...only the wire colour.

Here's a pic of what the femail plug running off my O2 sensor looks like (the clip is at the top)

Thanx in advance

Sam

Kennedy Mentor

Kennedy

Posted
  • Author
Posted
i did mine a few months ago and i just spliced the signal wire into the clear copper wire ( the middle one in your pic ) .... i think its 12v acc that your after and just run it from the cig lighter ....

easy as!!!

Clear copper it was. Thanks guys and Thanks Tosh

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