I have a 97 ford ranger. Everything is running fine, I stopped off somewhere, and when I went to start it back up I had no power. I checked the relays under the hood and when I went to start it again it started and ran fine as if nothing had happened. However, my radio presets were cleared out as if I had taken the battery out. This same thing happened once before about a week ago. It seems as if the system reset for some reason.