Fog Light Switch - Toyota 2008 Prius Quick Reference Manual

2-3. Operating the lights and windshield wipers
Fog light switch (if equipped)
The fog lights improve visibility in difficult driving conditions, such
as in rain or fog. They can be turned on only when the headlights are
on low beam.
Type A
156
PRIUS_U_(L/O_0802)
OFF
ON
ITY23P004