Fiesta 1.4 Tdci Mk6.5 2008

[shenmue]

hi everyone just got a 1.4 tdci fiesta 2008,not the new shape,i am getting a p0100 mass air flow circuit,i can drive the car with or without the 4pin plug attached to the sensor and it drives exactly the same no power like the turbo is not working no boost,its the same through the rev range and about 70mph flat out no throttle response not very good,no error lights on dash can clear the code but comes straight back and yes I bought a brand new maf sensor,its like no power or wiring is dead,so what im asking does anyone know what the 4 colour wires in the plug are going to the maf sensor.ie 12v ground back to ecu for example,its a 7004 part number at the end on the sensor itself siemens vdo,i need to know what colour wire does what,also is there a fuse and relay for the maf sensor wiring,if so does anyone know where they are on the car,any help would be appreciated,my first post so not sure ive done this right.thanks. :(