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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1789 (Engine Controls - Description And Operation -- Diesel) >> Powertrain Control Hardware >> Power and Ground Signals >> Vehicle Power (VPWR)

Vehicle Power (VPWR)

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VPWR is the primary source of PCM power. VPWR is switched through the PCM power relay and is controlled by the ignition switch. With the key in the START or RUN position, voltage is supplied to the PCM power relay coil. The supplied voltage energizes the relay and closes the internal relay contacts. With the relay contacts closed, VPWR is supplied to the PCM.

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