What is the reason why the light on the roof of the cab cannot be turned off?

[ElizaFitz]

The reason why the light on the roof of the cab cannot be turned off is that the always-on mode is activated. The specific details are as follows: Generally, there will be a button next to the light on the roof of the cab, with three modes: ON (always-on mode), DOOR (lights on when door opens), and OFF (off mode). When set to DOOR mode, the light will automatically turn on when the door is opened and turn off after the door is closed. If the button is set to ON, the light will remain on continuously and needs to be manually turned off. Additionally, the light on the roof of the cab may not turn off if the door is not closed properly, so the door status should be checked. If the interior light is abnormally on, check the light switch, door, and the light itself. Since interior lights are frequently used, most interior lights generally do not have issues. If you are unsure how to adjust the interior light mode, refer to the vehicle's user manual. If the light is malfunctioning and you cannot identify the issue, it is recommended to visit a professional repair shop or a 4S store for inspection.