Description & Operation
WARNING: This page is about a different car, the 2004 Ford Ranger, 2003 Ford Ranger, and 2002 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.
The electric cooling fan system consists of a single speed cooling fan controlled by Powertrain Control Module (PCM). One relay controls fan operation. The electric cooling fan is activated when ignition switch is in ON position and engine coolant exceeds a specified temperature. Cooling fan is also active when A/C is on.
The PCM monitors certain parameters (such as engine coolant temperature, vehicle speed, A/C on/off status, A/C pressure, etc.) to determine engine cooling fan needs. The PCM controls the fan operation through the engine cooling fan control output.