Good day all. I recently installed a Boost gage and mounted it in a dule gage piller mount I (an extra my brother had lying around) Since there was a gaping hloe where the 2nd gage goes my brother gave me an air/fuel gage he also had a spare of (Sorry for the bad grammer it's been a long day). My question is which of the 4 wires going into the front o2 sensor is the one I use to hook up to the gage to get my readings. There are two white wires (no other markings) a black and a greay wire. I appreciate any help anyone can offer. And yes I know an A/F gage is not the best gage to use but it was something free and looked dumb just sitting in the pod not hooked up. Pretty lights are cool....

Seriously Thanks in advance for any help. [sm=hail.gif]

P.S I have a 98 S70 T5m

 

I just found some infor on the Bosch website for those that are wondering....

Q. I have a Bosch original equipment 4-wire sensor. What do the wire colors mean?
A. All Bosch 4-wire sensors have a black wire for the signal, a gray wire for ground and 2 white wires for the heater. Note: the wire colors and functions on non-Bosch sensors are not necessarily the same as on Bosch sensors.

P.S- My sensor has Bosch stamped on the side so other sensor wires may not apply.