Hi, I commonly see this problem on Honda's and the door switches are fine. When you open the door and press the switches in/out the light turns on/off. What I've found is that if the door is out of adjustment it will cause the switch to not be pushed in hard enough and cause the light to come on.
Some vehicles the light stays on for a set amount of time but they shut off, I'm assuming this isn't the case though with your problem.
If this helps please accept. thanks