Problem scenario
Your Whirlpool dishwasher has been quiet for a while, but you are not sure if the cycle is done. How do you tell it if is running or not?
Solution
Do the lights look like this picture?

Or this picture?

The lower picture is how the dishwasher looks when it is off/done. The blue light in the upper-right-hand corner by itself should be off before you want to open it and get the clean dishes.
If you want a book on repairing a dishwasher, click here.