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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1334 (Engine Controls - Pinpoint Tests - 6.0L (99P F450/550) Diesel) >> Pinpoint Test A: Vehicle Battery >> Introduction >> Circuit Function

Circuit Function

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With the ignition switch in the START or RUN position, voltage is applied to the coil of the powertrain control module (PCM) power relay. The applied voltage energizes the relay and closes the internal relay contacts. With the relay contacts closed, vehicle power (VPWR) is supplied to the PCM.

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