I agree with Richard. Just replace the fuse and hold out for a while. Did you buy the new dome light yet? I see them on Ebay on occasion.
As to your other questions, the 2 plugs/harnesses should pull right out. The vacuum hose is used to PULL interior air across the interior temp sensor which is in the dome light. The other end of the vacuum line is connected to the Aspirator motor. Test it by checking for suction on the vacuum line with a small piece of tissue.
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