RV Repair: water heating, fifth wheel trailer, hot water heater

Question
Hi,
I would like to know specifically what the purpose of the light switch is for that has a light indicator on it? I just purchased a NuWa 2003 Hitchhiker II LS fifth wheel trailer. I think it's a switch for heating the water heater electrically? Not quite sure? The switch is located in between the sink and the stove. There is also a switch to turn on the propane tank for the hot water heater. That switch is clearly labeled in a cupboard door. I'm a newbie, so please bear with my ignorance. Thank you.

Answer
Hi Brian, Sorry I took so long the return this. I was out of town. It most likely is the 110 volt switch for you water heater. I guess the best way to test the theory is plug in the coach and turn off the propane. Turn it on and ck it in an hour. If it gets hot then that is its function. Good Luck.