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To check the generator light on a 1972 Oldsmobile 442, first ensure the ignition is turned on without starting the engine. If the generator light is illuminated, it indicates a potential issue with the charging system. You can test the generator by measuring the voltage at the battery with a multimeter; it should read around 13.5 to 14.5 volts when the engine is running. If the light stays on and the voltage is low, inspect the generator, wiring, and connections for any faults.

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