The luggage room lamp comes on when the tailgate is opened.
Kia Cee'd JD Service Manual: Windshield Wiper-Washer Switch Repair procedures
Inspection
Check for continuity between the terminals while operating the wiper and washer
switch. If it is not normal condition, replace wiper and wiper switch.
Wiper Switch
Washer Switch
Rear Wiper Switch
Rear Washer Switch
Removal
...
Kia Cee'd JD Service Manual: Flex Steering Repair procedures
Inspection
1.
Check the audio remote control switch (A) for resistance between terminals
in each switch position.
Switch
Connector terminal
Resistance (±5%)
...