I have a 2008 Tour and the driver's map light comes on with the dome switch as described by others. No light comes on when the door is opened.
However, when you unlock the door with the remote, the passenger's map light, along with the outside porch light, come on for a period of time. This gives you time to enter the coach and turn on one of the ceiling lights.
Just make sure you turn one of them on. Once I unlocked the coach and entered it without turning on any lights. All was good until the map light turned off and I was standing in the middle of a pitch black coach. I had to feel my way over to one of the light switches.
Bill, Elaine, Addie (Boxer Mix) & Rosie (Boxer Mix)
2008 Winnebago Tour 40WD, 2012 Buick LaCrosse
Blue Ox Tow Bar and Base Plate, US Gear Unified Tow Brake