We are new to the RV world. we bought a 1992 Sunline Solaris which is actually in great shape. All the records and the original owners manual came with it as well. We have read the book from front to back. There is a switch on the wal by the bathroom sink. We switch it on and it lights up. but we cannot figure out what it is for. I came to the conclusion it was a night light..anyone have any idea what it goes to?