I'm installing a air/fuel meter, need help with trigger lead?

[BigKriss]

Where the best place to access the trigger lead for the o2 sensor. My o2 sensor has 4 wires, 2 white, 1 grey and 1 black. I haven't tested it with the multimeter yet but I assume (thanks to derek A), it's the black wire.

Here are some pics of what's it like.

http://img196.imageshack.us/img196/406/pict0103small9wj.jpg

http://img273.imageshack.us/img273/2951/pict0101small6rn.jpg

http://img163.imageshack.us/img163/8454/pict0102small7mg.jpg

This is it here;

http://autospeed.drive.com.au/cms/A_0217/article.html

Where the best place to tap the trigger wire from the o2 sensor? Near the o2 sensor itself?

I know it was talked about recently here;

http://www.bimmer.info/forum/showthread.php?t=11798&highlight=oxygen+sensor+wire

[winfred]

the black wire is the one you want, you could get to it through the shifter hole as the sensor is right there

ps the meter will be mostly useless as the mixture swings rich and lean till you hit the wot switch at full throttle

[Jeff N.]

A narrow band is useless. I'm in process of tuning my MAF via a wideband sensor. Check out the Innovative product LC-1.

www.tuneyourengine.com

Jeff