A little background. It's a 95 2.0l ZETEC 5 speed with 180K miles. I've been having overheating problems lately. It's my wife's car, and we had a buch of work done after it severely overheated and blew the head gasket, (new water pump and timing belt, head gasket, thermostat, etc.). Last weekend it pegged to the red after climbing a hill and coming to a stop. I checked under the hood and steam was coming out of the overflow cap. Since then, it has been loosing enough coolant to empty the overflow tank daily. I can't see a leak at all. I did a KOEO test, and all of the fan related relays clicked on, and the fan ran in both low and high speeds. I am assuming that all of the relays in the underhood relay box are ok because of this. I checked the thermostat by putting it in boiling water. It opened and closed fine. I tested the Coolant Temperature Sensor and the resistance went down when heat was applied to the sensor. I put straight power to the fan, and it ran well. I put a meter on the resistor that is mounted on the fan and got a reading of zero K ohms. I don't know what value it should have. That's where I'm at now. I have a new radiator and hoses, but I don't want to waste them if the problem is this resistor. Remeber, I'm talking about the thing mounted on the fan assembly.
