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Home >> GMC >> 1995 >> Forward Control 7.4 N >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation - 7.4L >> Computerized Engine Controls >> Powertrain Control Module >> Power Supply
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Power Supply

Power for control module reference output signals (5 volts) and control devices (12 volts) is received from the battery through ignition circuit when ignition switch is in ON position. Keep-alive memory power is received directly from the battery.