in the harness that comes out of my firewall(s4) bellow the steering column , a cut yellow with red striped wire is just hanging out, i looked at my schematics but i dont know what it does so hence i cant find it. ill try to get a picture up later .any ideas?

 

Too vague a descripton, although the oil pressure sensor wire is that color and is located on the left side of the engine bay.

 

i think thats what it is but im not sure how it plugs in to the opsu

 

sorry but thats about as in depth as I can get , no joke its just a wire hanging out under the steering column next to the speedometer cable .
beyond that anyone have a pic of the plugin location on the oil pressure sending unit im at a loss with a cut end an no clips

 

never mind page 74 haynes manual

 

That Explains it all...
why don't you Share your info,as people tried to help you..Now it is your turn.
what is on page 74?.(solution?)

 

There is a photo of the oil sending unit and the associated proper connection.

 

thanks satch