Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCADILLAC1993FLEETWOOD BROUGHAM V8-350 5.7LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSPOWER STEERING PRESSURE SWITCHDESCRIPTION AND OPERATION
1993 Cadillac Fleetwood Brougham V8-350 5.7L
Power Steering Pressure Switch: Description and Operation
1993 Cadillac Fleetwood Brougham V8-350 5.7LSECTION Description and Operation
PURPOSE
The Engine Control Module (ECM) uses the switch status to extend the idle speed control motor and retard the timing during high power steering pressure loads to help maintain a stable idle. The ECM will also disengage the A/C clutch during high pressure loads.
OPERATION
The power steering pressure switch is normally closed and provides a battery voltage signal to the PCM with no power steering load. When a load is placed on the power steering, such as a full lock, the switch opens.
LOCATION
The power steering pressure switch is located on the power steering pressure hose between the power steering pressure pump and the rack and pinion gear.
The Engine Control Module (ECM) uses the switch status to extend the idle speed control motor and retard the timing during high power steering pressure loads to help maintain a stable idle. The ECM will also disengage the A/C clutch during high pressure loads.
OPERATION
The power steering pressure switch is normally closed and provides a battery voltage signal to the PCM with no power steering load. When a load is placed on the power steering, such as a full lock, the switch opens.
LOCATION
The power steering pressure switch is located on the power steering pressure hose between the power steering pressure pump and the rack and pinion gear.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.