Top rack wand is not spinning and spraying water.
Pump is putting water to the wand but not a lot of pressure.
Dishes on the top rack are not getting clean!
Do you have any idea as to what the problem is and how to fix it?

Make sure the screen in the bottom of the washer is clean. Water enters the sump through this screen and if it has been plugged by food or debris, it will pump but with reduced pressure. You may have to unscrew the spray arm connector to pull the screen and clean it if dirty.