Rosswilliams88

Hi all my a4 will not start. It will turn over but they is no diesel getting to the filter. The pump in the tank works if I put 12v direct to the pump and the car does run. Im guessing the relay is faulty or broken as the fuse (28) is fine. Does anyone know where the relay is I have a few under the steering wheel and a few under the ecu.
Or is there anything else I'm missing inorder for the pump to work.
thanks in advance