So, you don't have any running/gauge/interior lights...

I had the same problem with my 'new' 3g. I was racking my brain, until i realized I hadn't checked all the BULBS in the system.

If you have this problem, it is probably a blown/shorting out bulb... check your blinkers up front (the ones facing straight on). I found two shorted/blown bulbs, replaced them, and haven't blown a fuse or lost gauge cluster lights/cigarette/interior/running lights since!

Just a word from the now enlightened

Yeah, the bulb in my ashtray was out, but the one on the lighter worked, so I swapped them. I might go and replace the rest of them later. *shrug*

When I lost my gauge/interior/running lights, it wound up being a blown license plate fuse. Confused me for weeks.

Its one of the cases of when in doubt check everything....