Porsche951redt

Hey guys i am hooking up my A/R gauge as we speak and i need to know which wire is the 02 wire (aka what does it look like where is it located?) and at wich part of the wire would it be best to tap it?

Porsche951redt

Someone please answer im doing the wiring as we speak!

CurlyDE

Are you wiring up a narrow band afr gauge? If so, I used this article to wire up my gauge.

testarossa_td

Go here...it is scaleable.
Lindsey Link

Porsche951redt

I am just hooking up an Autometer A/F gauge

testarossa_td

I actually pulled the pin at the harness in the footwell, and soldered mine directly in and put the pin back(like the RacerX site). I also did this with a nice connector so that if I wanted to take it off , reroute the wire whatever..I could. I used the lindsey one in the picture(lindsey link), but the harness I made could be used with any Air Fuel. Molex connectors.

Porsche951redt

Well i am electrically challenged and i dunno how well i can pull of solderning the wire into harness. If i screw up something there i have to get a whole new harness. Is there any less technical way of doing this?

testarossa_td

Buy some posi-taps®
I think they say you don't want any voltage drop from the O2 sensor wire(for obvious reasons and I think you would be safe with the posi-taps-clean and reversable install.(so if you screw it up you won't be screwed

Just tap that wire anywhere along the line. Most do it in the passengers footwell as it is convenient and protects it from the weather.

The lindsey drawing tells you everything you need to know.

CurlyDE

It is really easy to pull the pin from the harness and solder it on ... that was the first thing that I have ever soldered. I did not even know what flux was at the time ... =)

Porsche951redt

Yea it looks like soldering it will be the safe way. However i have took a look on the forums and someone once said that if you hook the ground wire to the ground of your stereo per say it will cause interference and screw up the gauges reading. Since the way a A/F gauge measures via electrical signals i could see how disturbances from the stereo could affect it. Any thoughts on that?

CurlyDE

I bought the rennbay (I think it was rennbay, the gauge that replaces the digital clock) afr gauge. I wired the power and ground up to the existing clock harness (soldered to the back of my old clock's board so that I could just plug in the clock harness). Narrow band is not that accurate, but it seemed to work well enough ... on part throttle it would dance around a bit, on full throttle and off throttle it responded exactly as it should.

I recently purchansed an LM-1 wideband kit and another digital clock, so I will be removing my narrow band in the next week or so.