1.To hookup volt meter:Take the 2 black wires and ground them both out.Which on the stock stereo is grey.I used t taps to hook them up.
2.Take the red/blue wire and hookup to the red/blue wire on the stereo for illumination.
3.Take the green wire and hook up to the blue wire for volt meter.
To hook up the oil pressure you need a z32 oil sending unit.Install that and hook up the yellow/red wire to it.You will have to run a wire to the oil sending unit from the gauge.Just take out the stock oil sending unit and replace it with the z32 one.
To hook up the boost you need boost sensor on a rhd front clip.You probaly hook it up to a aftermarket boost gauge if you had one i dont have turbo so i havent tried.
BY THE WAY THEY ALL RUN OFF 12VOLT THERES NO DIFFERENCE IN JDM AND USDM ALL 12VOLT.Heres a link for more info :
http://forums.freshalloy.com/u...65308