Power Steering Pressure Switch
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2002 Mazda Protege5, 2002 Mazda Protege, 2002 Mazda Millenia, 2002 Mazda MX-5 Miata, and 2002 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.
Disconnect Power Steering Pressure (PSP) switch connector. Connect ohmmeter between PSP switch connector terminal and ground. Start engine and operate at idle. Turn steering wheel from side to side and observe ohmmeter. Continuity should be present when steering wheel is fully turned. Continuity should not be present when steering wheel is straight ahead. If continuity is not as specified, replace PSP switch.