GFCIs are usually in places like the bathroom. Do you have an outlet there? Look for a small button on it. Push the button in. If that does not fix it, look in the kitchen for the same thing and try it. Last resort, with the power disconnected from the trailer, take a screw driver and take the dead outlet apart and look. If you have b÷n using a space heater it is highly likely you have a burned wire. Where abouts are you living? Im in Salem area and for a fee would be willing to come and help you out.