Dishwasher fills w/ water, does not wash, but does drain.

Joel, it's hard to tell whats going on here without the full model number. The number you posted should start with a 665, 363,587 or 464.  Here is a couple of things to look for.  It sounds like you have a seperate drain pump. Remove the bottom toe panel and hopefully there will be a tech sheet behind it.  Check the harness to the motor itself.  You want to verify that there is 120V going to it when the wash motor should be running. If you hear the motor humming and kicking out on the overload, then we can assume you have something stuck in the impeller or the motor is bad itself. The tech sheet will give you a diagram for the hot and nuetral.  Check the float switch inside the tub, it should move freely up and down. This is a safety device to insure the dishwasher does not overfill.  If this is a 665,  there will be a start capacitor on the left side of the wash motor.  If one of the wires came off the cap,  the motor won't run.  Regarding the door switches,  if you have 120V going to the motor during the wash cycle, you can assume the door switches are o.k.   Hope this gets you started in the right direction...Catriver.