2008 Toyota Tundra Owners Manual - Page 192
2008 Toyota Tundra Manual
Page 192 highlights
07 11.20 To use the vanity mirror, swing down the sun visor and open the cover. Vanity lights (type B only)- The lights come on when you open the cover. To adjust the brightness of the lights, slide the switch. 162 2008 TUNDRA from Apr. '08 Prod. (OM34477U)