Why is the interior light on all the time?

When you say this indoor light, you mean the ceiling light. The dome light has three levels: off, always on and gated. If you turn the switch to the normally open position, it will definitely stay on. If you hit the door control gear, it must be that one of the door control switches is broken. If it is closed or always open, it means that the problem lies in the switch or the line. If there is a power connection, it needs to be checked one by one.