Releasing energy and power As the horse symbolizes force and energy in the dream, the unharness points out that now these are released. According to applicable properties that can symbolize other riding animals as well. This shows that the dreamer has freed himself from external or internal inhibitions and restrictions. Now he has to be sure that he uses the newly acquired energies and it is also useful and makes sense.
Often indicates that you have “harnessed” and restrict yourself, then you should look for exaggerated morality and similar inhibitions, too much sense of duty and pedantry.
* Please, see meaning of wind down.