K 3500 Truck 4WD V8-454 7.4L (1994)
Fluid Pressure Sensor/Switch: Description and Operation
Pressure Switch Manifold
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:
The Pressure Switch Manifold (PSM) is a gear range sensing device used by the control module to sense what gear has been selected by the
vehicle operator. The PSM is located on the valve body and consists of five pressure switches combined into one unit.
