2000 Audi S4 HFS-3 not spraying ::CORRODED PUMP::

[RusS4!]

Just as title says im having problems with my HFS-3 system not spraying. It was spraying before but for some reason has stopped working. I am pretty sure its wired correctly because as I stated it was working correctly before. When I turn the ignition key to on position the yellow water light comes on for a few seconds then the red w.injection light comes on and the gauge fully lights up. When I start the car the flashing light in the controller box flashes like it should. I have also tried re-priming the system. Any help is greatly appreciated.