Kia Optima: InspectionCheck for continuity between the terminals while operating the wiper and washer switch. If it is not normal condition, replace wiper and wiper switch.

Wiper SwitchTachometer
The tachometer indicates the approximate number of engine revolutions per minute
(rpm).
Use the tachometer to select the correct shift points and to prevent lugging
the engine and/or overrevvin ...
Driver Power Window Switch (1)
...
Lumbar support (for driver’s seat)
Press the front portion of the switch to increase support, or the rear portion
of the switch to decrease support. ...