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 or unlock button, the room lamp will turn off immediately.
Kia Niro (DE HEV) Owners Manual: Room lamp bulb replacement
WARNING
Prior to working on the Interior lamps, ensure that the “OFF” button is depressed
to avoid burning your fingers or receiving an electric shock.
1. Using a flat-blade screwdriver, gently pry the lens cover from lamp housing.
2. Remove the bulb by pulling it straight out.
3. Instal ...
Kia Niro 2017 (DE HEV) Service Manual: Tailgate Assembly Components and components location
Component Location
1. Tailgate assembly
...