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If you get back to me with a model number I can grab some wiring diagrams for you. Or check the switches and see which one may be defective and not turning off.
I am attaching the 12 VDC wiring diagrams for this year and model. I think that is called "Porch" but, look at the others as well. http://www.winnebagoind.com/diagram/2006/06_p36g_wire_153549.pdf
Here are the other diagrams. I am not sure what they call this light. http://www.winnebagoind.com/diagram/2006/06_p36g_wire_153554.pdf
I think you need to give Winnebago Customer Service a call as I have no diagrams other than the ones they have on their website.