so if i am right all u have to do it hook up the negitve to a ground positive for the light itself then the yellow wire to the oxygen sensor am i right ? Nismo pic ? just wondering how u did yours.. ?

 

Didn't it come w/ instructions? I don't remember which colored wires go where, but yes... you need a ground, + accessory, and O2 sensor lead. Thas it. Be careful when you tap into the O2 wire, as it is shielded most of the way. When I did my Z31T ecu swap, I cut the O2 sensor wire, and added a wire that I doubled over, so I had a wire sticking out to connect to the a/f gauge.