DeVille V8-4.6L VIN 9 (1995)
Power Steering Pressure Switch: Description and Operation
POWER STEERING PRESSURE SWITCH
The power steering pressure switch is normally closed and provides a battery voltage signal to the PCM with no power steering load. When power
steering pressure increases to a calibrated level due to steering load (such as full steering lock), the switch opens and causes the signal voltage to
the PCM to drop to 0 volt.
POWER STEERING PRESSURE SWITCH SIGNAL
The PCM uses the power steering pressure switch signal for idle speed control during high steering loads to maintain a stable idle. A shorted
power steering pressure switch may cause a stumble or stall during steering loads and an open switch should set a Diagnostic Trouble Code.
