Perhaps it is 2 seperate issues that just happen to occur at the same time. I would think the little red fuse on the back of your instrument cluster might answer the interior illumination issue. As far as the tail light goes, perform a visual check to ensure the the harness was not inadvertanlty disconnected.

If there is a connection between the 2 failures the only immediate thought I have is the headlamp switch. I'll check the electrical manual and follow up on it later today.