Had a friend call me this afternoon and said he spilled a bit of water on his cooktop and now none of the elements work. I had told him to give it a few days to dry out and he said that it happened about a week ago. I just took a look over the wiring diagram and I don't see any one thing that would cause all the elements to stop working, less the water shorted all four switches. Just wanted to get some insight before I went over to check this one out.
Link to wiring diagram.