Three Speed Fan Operation

WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

Although the PCM output circuits are called low, medium, and high fan control (FC), cooling fan operation is controlled by a combination of these outputs.

Refer to POWERTRAIN CONTROL MODULE (PCM) OUTPUTS .

Fig 1: Identifying Low Fan Control (LFC) Relay Connector Terminal

Courtesy of FORD MOTOR CO.

Fig 2: Identifying Medium Fan Control (MFC) Relay Connector Terminal

Courtesy of FORD MOTOR CO.

Fig 3: Identifying High Fan Control (HFC) Relay Connector Terminal

Courtesy of FORD MOTOR CO.

Fig 4: Identifying Left Fan Motor Connector Terminal

Courtesy of FORD MOTOR CO.

Fig 5: Identifying Right Fan Motor Connector

Courtesy of FORD MOTOR CO.

Fig 6: Identifying Powertrain Control Module (PCM) Connector

Courtesy of FORD MOTOR CO.