Waking, dreaming and deep sleep are states of the mind, not consciousness. Consciousness is that which reveals the awake mind, and it reveals the sleepy mind. Also, consciousness is not awake. Ou can say consciousness is always it's like the sun because in the sun there is no night and day. We are alert, alert and dull, keen, blunt mind, slow, lazy, sharp. It requires lot of effort to be conscious.
Inspired by the 15th chapter of the Ashtavakra Gita, Swami Sarvapriyananda gives a discourse on the nature of the Self.