I'm 99% sure that the light wouldn't go on while the vehicle was in motion. The only 2 mods I did (if you'd even call them that) were disabling the reverse beep and the seatbelt beeps. Now it turns on even while I'm driving. Is it related to those changes, or does it always turn on & I just thought it didn't?
The vanity mirror doesn't turn on unless the vanity mirror cover is open, and the switch is in the ON position.