When the interior light switch is in the DOOR position and all doors (and tailgate) are locked and closed, the room lamp will come on for 30 seconds if any of the below is performed.
At this time, if you press the door lock button, the lamps will turn off immediately.
Kia Cee'd JD Service Manual: Front Oil Seal Repair procedures
Removal and Installation
1.
Crankshaft damper pulley.
(Refer to Timing System - "Damper Pulley")
2.
Remove the front oil seal.
...
Kia Cee'd JD Service Manual: Battery Sensor Description and operation
Description
Vehicles have many control units that use more electricity. These units control
their own system based on information from diverse sensors. It is important
to have a stable power supply as there diverse sensors giving a variety of information.
Battery sensor (A) ...