Compressor Controls: Notes
WARNING: This page is about a different car, the 1994 Mercury Grand Marquis and 1994 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
When a mode is selected on control panel which would allow compressor clutch operation, the compressor signal must first go through the clutch cycling pressure switch. This switch signals engine Electronic Control Assembly (ECA).
The ECA controls ground path for A/C compressor cut-out relay. The ECA disengages compressor clutch during Wide Open Throttle (WOT) operation. WOT is monitored by ECA through throttle position sensor.