I am just working through this exact problem with my 96 tour. First thing to check is the fuse. In my case, the fuse slot was strectched, take a new fuse and bend the tabs aways from each other and replace it. If you get power back you are ok. However if the fuse continues to blow, you have a short. I narrowed the short down to my dome light, every time I repalced a fuse it would pop, but when I unnplugged the dome light line from the fuse box, it would no longer blow. SO now I am left with everything working fine except for my dome/map light. This problem can be caused by a short in anything on that circuit.
Let me know what you find.