A/C Switch
NOTE:
On Concorde, Intrepid, LHS and 300M Automatic Temperature Control (ATC) models, the A/C switch is incorporated in the automatic temperature control head.
Switch signals PCM that A/C has been selected. PCM then activates A/C compressor clutch relay and maintains idle speed at a preprogrammed RPM. This is done through control of Idle Air Control (IAC) motor.