Wiper/Washer Switch
WARNING: This page is about a different car, the 2003 Lexus IS 300 and 2002 Lexus IS 300. However, it is still accessible from the selected car via links, so may be relevant.
For removal and installation of the wiper/washer switch, see COMBINATION SWITCH under REMOVAL & INSTALLATION under STEERING COLUMN SWITCHES article in ACCESSORIES & EQUIPMENT.