Taurus V6-232 3.8L (1989)
Power Steering Pressure Switch: Testing and Inspection
Component Testing
Check operation of the switch if either or both of the following problems are noted:
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Engine stalling during parking maneuvers.
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Engine idle speed is excessively high.
The following test is based on the fact that the switch is normally closed. As power steering load increases, the switch opens and increases the idle speed.
1.
Disconnect the electrical connector at the pressure switch.
2.
Connect a continuity tester across the pressure switch terminals.
3.
START the engine and let idle.
4.
Switch should be normally closed (zero ohms) with the steering wheel straight ahead position.
5.
Turn the steering wheel toward either stop while watching continuity tester. Switch should open near the stops (no continuity or infinite reading).
6.
If switch fails either test, replace the switch. If the switch is OK, check the idle speed control system.
