Truck Repair: isb 225 45985118, engine oil pressure, oil pressure sending unit

Question
cannot locate the engine oil pressure sending unit    7-oo freightliner by hackney&sons hh01784  

Answer
Well I can tell you where the oil pressure sensor is,but they have a new one that requires a installation of a wire in the 23 pin connector & recalibrating the ECM.You can possiblly get the original one.It is on the fuel pump side between the ECM & transfer pump.It has a 3 wire plug.It takes a 1 1/4" socket to remove.