Powertrain Control Module (PCM)

The PCM monitors and regulates A/C system. The Electronic Engine Control (EEC) system, working through Wide Open Throttle (WOT) relay, disengages A/C clutch under the following conditions: immediately after start-up, wide open throttle, coolant temperature approaching overheating condition and engine idle RPM approaching stall speed.

Fig 1: Identifying A/C-Heater Control Panel

Courtesy of FORD MOTOR CO.

Fig 2: Identifying Manual A/C-Heater Control Components

Courtesy of FORD MOTOR CO.