Follow either of these procedures:
Kia Cee'd JD Service Manual: Components and components location
Component Location
1. Rear defogger relay (Built-in
smart junction box)
2. Windshield deicer switch (Rear defogger switch)
3. Windshield deicer
4. Deicer connector
...
Kia Cee'd JD Service Manual: Components and components location
Component Location
1. Panoramaroof
2. Panoramaroof switch
3. Panoramaroof motor & controller
4. Roller blind motor & slave controller
...