We have a ceiling fan/light fixture in our family room which has one wall switch at the front of the room and another at the other end of the room. There are also switches for other lighting at each location, but the wiring for the fan/light has me puzzled. The light can not be turned on unless the fan is turned on. However, the fan will run without the light being on. We have the same fixture in other rooms and either the fan or light can be run separately. What should I look for so the light will turn on without the fan running, incorrect wiring at the wall switches or the fan/light fixture?