my windows, door locks, turn signals and\ rear defrost all quit

This is Kevin with NWA Auto Shop. Without seeing the vehicle, I can only theorize. Based on the limited information given, these are my thoughts. A) Sounds like a component that controls more than one circuit failed. There are relays that send power out to different circuits. Often times located under the hood. Check owners manual for the different circuits connected to a single relay and see if it is the cause. You can swap matching relays around and see if the affected systems change. Thanks