Hello all. I am brand new to RVing. I just purchased a 2013 Thor Sprinter Siesta 24SR. In the compartment where I attach my sewage line for dumping...there is a black switch and it is not labelled....when I turn it on it sounds like it starts the pump?
I also have a mystery switch but in the fresh water connection compartment instead. The switch turns on/off the water pump if you wish to use the outside shower. Saves the need of having to go back inside to turn it on. Labels are so cheap.