Here are your parts
http://www.servicematters.com/d...0Sheet%20-%208563494.pdf

Machine will not wash...water pressure is weak and the wand does not move. I replaced the valve (which everything I read about pointed towards)...nothing!
I am assuming you mean the water inlet valve.
I believe these units should fill to just under the heating element.
If the unit fills correctly but towards the end of the wash it is low on water then it may be draining water while it is washing.
Usually you would hear this as the pump will cavitate (suck air).
Check that the solenoid/flapper valve is returning all the way to the wash position. Solenoid valve is on the left hand side of the pump module.
Also is you look at it, many of them have a rubber seal in the center of the flapper perhaps this is missing.
If you look up the pump in the parts and then click on it's picture a new page will open with more views and you will see what I mean.

Do I have a bad pump-motor?
Possible.
Check that the holes in the spray arm are clean.
Remove the sump cover from inside center of the tub.
Take note on how the inside part is installed, put it back in incorrectly and the chopper will eat it.
Check that there is no debris in the sump or something wrapped around the chopper.
Be careful there is often broken glass in the sump.
Check that the screen filter assembly at the back, inside of the tub is clean.

Here is a site that may be useful to you
http://www.applianceaid.com/dishwash.html