K 3500 Truck 4WD V8-350 5.7L (1993)
A/C Signal: Description and Operation
A/C Compressor Clutch Circuit
NOTE Because different models and engine applications vary in wire colors, circuit numbers, and pin numbers, the above image is a typical example.
Refer to COMPUTERS AND CONTROL SYSTEMS/SCHEMATIC AND ROUTING DIAGRAMS for specific schematic applications.
PURPOSE
This signal indicates that the A/C control switch is turned "ON" and the pressure switch is closed. The control module uses this signal to increase and
maintain idle speed.
The ECM does not control the A/C compressor clutch.