Dreams involving cars often symbolize control, direction, and the journey of life. In your dream, your wife driving a car without lights may represent a feeling of uncertainty or lack of guidance in some aspect of your life or relationship. The crash and the cliff could indicate a fear of losing control or facing a significant change or challenge that feels overwhelming.

This dream might be prompting you to reflect on your relationship dynamics or any issues that may need to be addressed. It could also suggest a need for better communication or support between you and your wife. Consider discussing any feelings of anxiety or concerns you may have in your waking life, as this might help you both navigate any challenges together.