1. Connect the voltmeter's negative lead to the alternator's frame and the voltmeter's positive lead to the battery's negative (-) terminal.
2. Start the engine and run at specified speed (about 2000 rpm).
3. Read the voltmeter. The voltage drop should be 0.2 volt or less. If it is more, locate and correct the cause of high resistance. Excessive resistance is most likely caused by loose or corroded connections.
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