I'm not an expert, but it sounds like a leak may have developed and managed to short out the motor.  This is not uncommon.  If you're somewhat mechanically inclined, it may be a bit involved but not a super difficult repair.  Finding a new (or replacement) motor could be the bigger task.

There is a wealth of KitchenAid knowledge around machines of your vintage among the membership here.  Someone who is likely able to diagnose the problem from what you've described and provide details on the repair process will probably post something.  Be patient.

The machine is worth saving if it's still doing a good job for you.  It cleans better and faster than anything you can buy new.  I believe your series is the type described as "A hurricane in a box."

We have lots of parts or this DW, where are you in Va.? The best thing is to get an older independent repair person that is interested in helping you get this DW fixed to look at it to figure what went wrong. It could be and easy fix or not so easy but there too many possibilities to just guess what smoked. John.

and if I can fix it anyone can. 

On mine the drain shaft seal failed which I guess is pretty common when they get this age.  What happens is water drips down onto the motor while it's running and I'm told that if this gets bad enough it could burn out the motor and other components.  I caught mine early and fixed it.  It was a very EASY fix on this model and the best part was I didn't have to pull it out to do it.  Maybe you will be as lucky as I was.  The guys here (or the right repairman) will definitely help you diagnose the problem and hopefully can help with the fix it too.