What causes the headlight to come on when the light switch and car are off?

What is your question?

Over the past couple months, I have noticed 5/6 times that when my car is parked (engine off) and light switch is turned to off position, my driver side headlight has been coming on and staying on. But when I start the car and the switch is still off, the driver headlight will turn off. I’ve turned the switch to auto and the same thing happens: it turns on when the engine is off and turns off when the car is started. When the switch is turned on, both lights stay on whether the car is on or not. I’ve had the driver side headlight and module replaced 2 weeks ago but the problem still persists.

What makes this problem better or worse?

I can’t tell

How long has your 2010 Mazda 3 had this problem?

2 months