washer will go through all cycles except the spin 
There are two version of your model, a good and better, and you have the good version.
There is a diagnostic mode which produces error codes through flashing lights.
Here is the service manual which will take you through the process. I would focus on the speed/motor control board.
http://frigidaireservicetips.com/pdfs/490_3cuftHorizontalAxisWasherSM.pdf