Overheating

We have replaced the thermostat, Coolant Temp Sensor, and replaced fan relays. Fans do work when wired directly to the battery. I have also flushed the radiator. I also know that all of the fuses are good. Along with that I know that there are more sensors however; I can not find any information that explains where these are located. Please let me know where these other sensors are located or what else may be the problem.