If your dishwasher is dead and you have checked the connections in the box under the dishwasher, the next thing I would check would be the door switch. If your door switch is faulty, you will have a dead dishwasher. After that, your dishwasher is equipped with a thermal fuse behind the control panel. Again, if this is faulty it would result in a dead dishwasher. Hope this helps.
JP
April 2006
KitchenAid dishwasher, Model No. KUDM24SEAL, Serial No. FH4903486. A similar problem has happened twice in the past and it was do to faulty timers. I would hate to think this is do to the same thing. Three timers in seven years is a bit much! The problem is the same, and that is, the dishwasher will not start.