The maual does say "The vanity lamp is incorporated into visor assembly. If the lamp needs to be replaced the entire visor must be replaced. The bulbs are serviced separately"
So if it is just a bulb out it goes on to instruct... "use a pick or other suitable tool, pry the lens from the lamp". It appears that you lift up lens to access the lamp/bulb.
I can fax you the page with diagram of lens removal and bulb replacement if you like. I should be ablre to look up the bulb you need by then. email
[email protected]
John