sorry, there are two buttons, the one at the back and the one on the sliding door. when the back door button is pushed once, the back door lights turn on, a second time, all the lights turn on, and a third time, all lights turn off. for the sliding door, when pushed once, the sliding door lights turn on, a second time, they all turn on, and a third time, they all turn off. sorry, should have been clearer.