Mine tells me if a brake light is out, but not the parkers or other lights. Also beeps when the ignition is off and the lights are left on. And it rings little chimes when I go over 110kph (which is an extremely rare affair for me, nowadays)- it's a silly sound and I'd like to change it to "Kashmir" or something. Plus, it has an extra set of night-lights that run off the hazard switch, which can be switched to either left, right or both sides of the car. Good old 1973 Jap technology.