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Home >> Cadillac >> 2001 >> DeVille Base >> Repair and Diagnosis >> Electrical >> Gauges >> Analog Instrument Panels & Electronic Instrument Panels >> System Tests >> Test Ad: Malfunction Indicator Light Inoperative >> Circuit Description

Circuit Description

Battery positive voltage is supplied directly to the malfunction indicator light (MIL). The powertrain control module (PCM) turns the MIL ON by grounding the MIL control circuit. There should be a steady MIL with the ignition ON and the engine OFF.

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