Do those lights come on when you turn on the ignition? They warn you of low or no brake pressure. There is a button to push on the dash to test the bulbs. If they don't ever come on don't drive the car until you have fixed them. I have had Shadows come into my shop with the bulbs in those warning lights removed to hide brake pressure failures, very dangerous. The other way to check the bulbs in those is to shift the transmission into R (reverse) and turn the ignition key to start. The engine will not start but those lights should light up.