Wrinkly leaves means the roots have become compromised so water is not being absorbed and sent to the leaves. It can be caused by over or under watering but, usually in a Jade, over watering leads to rot. Under watering leads to wilt.
How long since you re-potted? When you water, does the soil feel wet (you will have to work your finger down in there to check)? What does the soil look like? Eventually old worn out soil, build up of fertilizer salts and old roots make a re-pot necessary. It may be time.
Jades are full sun plants.
BTW, Fertilizer is not medicine. It only makes things worse, never better.