Hi my name isXXXXX have been an appliance servicer since 1992. Sounds like a switchYou would have to remove all grates, top base to burners. the complete glass top with the surrounding screws around the entire cooktop glass. Slowly lift off and you will have access to the switches. I do not have the service manual, because the Manufacture Jennair did not publish one, but only the wiring diagram.
Sounds like I would have to disconnect the gas and electric before doing what you suggest. Correct? My glass top is connected to the ceramic tile countertop by grout, not screws. I was hoping for some way to access the switch without having to disrupt the grout, which is a real pain to redo. There is some kind of panel in the front of the unit, under the counter. Would that give me access? Frankly, it doesn't look like it from the outside. The switches seem to be "outside" the boundaries of the panel.
What is going on? Are you there? Please reply.
What more info do you need?
Read my reply and then we can talk.