Will a bad dishwasher timer keep spray arms from rotating and spraying water?

I have a gsd2100v50bb dishwasher (ge). I started the dishwasher at night before I went to bed. The next morning it was still running.... The timer didn\'t advance all the way. I then turned the dial a few times, and decided to tryrunning the dishwasher again while watching it.. Water came into the unit. It waited a short while, then the water was drained. The arms never went around, water was never sprayed out. The timer moved at first, but it did get stuck later on. I think that probably means that the circulation pumb is bad as well. I just wanted to know, if the timer not working could be the culprit and how do I tell? (to make sure the pumb is bad). I would replace the timer, but not the timer and circulation pumb. Thats too much money for this older dishwasher. I prefer this dishwasher over a new one, as it is electro mechanical.