where does this plug into?

[weszeebee]

I have a 1995 GSX, I have a 4 prong connector with a white,red,black,and a yellow wire with a black strip. These split off the same set of wires that plug into the relay that is stamped MB398020 behind the stereo. I have looked for hours and cant seem to find where it plugs into.Click the link below for a picture. Any help is greatly appreciated. thanks

https://sphotos-a.xx.fbcdn.net/hphotos-prn1/64221_10200848795208898_515575559_n.jpg

 

[jayson427]

well is your car m/t or auto? it could be a sensor that isnt used i cant say that im familiar with that one in the picture tho.

 

[weszeebee]

Its manual trans

 

[19Eclipse90]

http://www.dsmtuners.com/forums/electrical-tech/431698-help-me-identify-connector-new-harness-my-dsm.html Rear O2 Sensor

 

[jayson427]

so its a rear o2 sensor

 

[pauleyman]

This is why you own a factory service manual. Every connector and circuit diagram is in there including wire colors etc

 

[weszeebee]

hey thanks guys, Im looking under my driver seat and cant find anything to plug it into. Im fairly new to how this car is set up. Would I have a rear o2 if ive got a aem wideband? I found this 4 prong unplugged because i was trying to figure out why my wideband wont light up. I had the car running one day then i shut it off then it wouldn't start back up and the wideband wont light up anymore. I just got my ecu back from ECM (upgraded to V3) but i cant get a working connection to ecu. Everything is set up correctly but i cant get a response back from ecu.

While I was trouble shooting the no start issue I found that my fuel pump wasn't turning on but if I trip the fuel pump relay manually It turns on but she still doesn't start.

Sorry for the novel, Ive been trying to get it all figured out myself for about a month now and Im frustrated to say the least. Again thanks for any help.

 

[DannoGSX]

You may or may not have a rear o2. Take a look under the car to confirm whether someone removed it. If they did, and there is no wire with some sort of bypass unit attached, then I would expect that your CEL is illuminated.

 

[gieri002]

Chances are that you no longer have a rear o2 since you have a wideband. Many people screw the wideband o2 sensor into the rear o2 bung. Don't worry about it, it won't effect performance.

If you do have a check engine light, you can simply disable it with v3.

 

[weszeebee]

I can't connect with my ecu though, it doesn't give me a response back when I try to connect. Would my mfi & fuel pump relay be bad if my fuel pump only comes on if I manually click the reley?

 

[99boostedgst]

If you can't access link via laptop then that means your fuse is bad. Either cig lighter or ? Fuse is bad I was having that issue!! And when you do bring up link check all the stuff via v3 like fuel pump exc but going to the tab and also the wire could be for a electric seat?