Edit: The wall switch question has been answered

[Olive600]

I have the answer...I think. It's for the light in the shower. I'll bet the bulb is burned out. One more thing to add to the list. Thank you to everyone who made a guess.

[BirdbyBird]

That switch turns on the light that is in the shower. If you still have a light in the shower that you haven't taken out. The switch in the bathroom to the right of the sink turns on the light/s in the sink area......

[Olive600]

Tina, if I had a prize, you would win! Yes, there is still a light in the shower.
However, there is no bulb in the light. How do I know what kind of bulb to buy?
I am so tired of feeling stupid. Waaaaahhhh!

[avalen]

Tina, if I had a prize, you would win! Yes, there is still a light in the shower.
However, there is no bulb in the light. How do I know what kind of bulb to buy?
I am so tired of feeling stupid. Waaaaahhhh!

I used to borrow the bulbs from other lights I didn't use. But of course eventually I had to buy some

[JudyJB]

I have a water pump switch on my control panel, but an extra one next to the light switch in the bathroom. Maybe it is an extra pump switch for convenience????

Actually, I had a similar wall switch in my old condo. Never could figure out what it was for. lady who bought my place had same question, and I told her I had no idea!

[BirdbyBird]

Judy, I have an advantage...my rig is a Gulfstream B-Touring 2007 with a similar layout of kitchen and bath.... and a similar switch.....