I have the attached circuit where a switch is used to allow voltage to a zener diode. As you can see, when the switch is open I still get voltage across the zener when I should be getting nothing. The only way to get nothing across the zener is to remove the switch and do not make any connections. I understand the switch is modeled by two resistors, one very high and the other very low, but that does not explain why I am getting the voltage across the zener with the switch open? Any ideas what is going on here. If this is the case, then the switch is essentially useless and I need to keep putting in and taking out a connection, or using the switch and putting an open fault on it. Neither are ideal solutions. Any help would be appreciated.
