I'm trying to fix a simple fan at home. Inside the fan, there is no circuit board. There is only a transformer a switch (on high, low, or off), and I assume that there is a motor. I believe I can fix the fan if I knew what color the wires stand for. I turn the fan on, It doesn't move. It's a sound like the motor is trying to spin or something. A brown wire and a black wire are simply twisted around each other and not conmnected to anything. I think that they came lose because they were improperly soldered. Can anyone help?