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i never installed one in xb yet... but from wat i remember autometer air/fuel ratio gauge has 3 wires... red black and purple... i think red is 12V black is ground and purple is signal from your O2 sensor.... you have to find out which wire is the right one O2 sensor has 3 or 4 wires some cars have 5 wires and it has power, ground, signal(high and low) for 4 wires... autometer tells you to tap it onto signal(high) wire... just tap on anything and you will find one that works... it doesn't messup your car or gauge... i did that to my celica like 2 years ago... and i found right wire to work with...well good luck with it...
 

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Which wire was the right one? A pic might be nice. Im thinking about changing some of my gauges and adding A/F gauge. If you can describe it that will be good enough as well. Im sure I can figure out what you mean...
 

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Box Luvin
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Discussion Starter #8
PeruzziScion said:
Which wire was the right one? A pic might be nice. Im thinking about changing some of my gauges and adding A/F gauge. If you can describe it that will be good enough as well. Im sure I can figure out what you mean...
It was the O2 sensor closest to the engine (not the one under the middle of car) its the black wire, I believe it was the 2nd black one. Just spliced in and then ran the wires to the gaue and what not. I will get a pic up once I get back under the box. Hope this helps you.
 

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It was the O2 sensor closest to the engine (not the one under the middle of car) its the black wire, I believe it was the 2nd black one. Just spliced in and then ran the wires to the gaue and what not. I will get a pic up once I get back under the box. Hope this helps you.
Hi,
Did you ever take a pic of the sensor wire?
Have a car with a similar engine ( JDM Vitz RS ) and plan to install my a/f gauge this weekend.
 
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