The switches are labeled AUX 1 through AUX 6. They only operate when the ignition is in the on position or in the off position when Delay Accessory is active, whether the engine is running or not. We recommend that you leave the engine running to maintain battery charge when using the switches for an extended time or when using higher current draw accessories. When a switch is turned on, the indicator light on the switch illuminates and the circuit provides power to the device wired to that switch.