Originally Posted by Bama Rambler
I think it just means that there is another paralleled pump switch in a different location, so it turns on a light to let you know that the pump has power for that remote location, so you know that the pump is still on even if the switch on that panel is off.
So that would make sense to an electrical engineer. I'm not an engineer so it would seem to me it would be more simple just to have the light on the pump switch come on. Engineers don't like to do things simple, though and we all agree that it seems like whomever designs some RV features don't have one or camp in one!