The luggage room lamp comes on when the tailgate is opened.
Kia Cee'd JD Service Manual: Front Seat Shield Outer Cover Components and components location
Component Location
1. Front seat shield outer cover
...
Kia Cee'd JD Service Manual: Troubleshooting
Troubleshooting
Problem Symptoms Table
Before replacing or repairing air conditioning components, first determine if
the malfunction is due to the refrigerant charge, air flow or compressor.
Use the table below to help you find the cause of the problem. The numb ...