Does the pump run? Bit hard to diagnose from here. If the pump does not run check for power and earth at the plug. If it does run then check the hoses and jets for blockage. You needed us for this?
Good - Fast - Cheap: Pick any two.
E23 735i; E30 318i; E32 735iL (X 2 - 1 Alpine White and 1 Glacier Blue); E34 535i; E38 735iL; R50 Cooper; R55 Cooper Clubman.
E21 318i; E32 735iL; E34 535i; E38 730iL; E53 4.4i