Do you mean you've tried replacing the bulb and it didn't work? If so, did you check the fuse? Last resort is going to be a wiring harness replacement - many Volvos of this era had their stock ones replaced early in their life as they caused blown bulbs.
Also, 2000 is the last year of the prior body style. The new body style (P2) went on sale in 2000 as a model year 2001 car.
For detailed technical help you should post on the V70 forum at
www.swedespeed.com,
www.brickboard.com, or
www.vvspy.com (there are many others as well.)
Good luck.