oldsmobile Workshop Repair Guides

Oldsmobile Workshop Service and Repair Manuals

Engine Control Module|Testing and Inspection > < Diagram Information and Instructions|Page 228
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that a test light will not light when connected to the circuit. In some cases, even an ordinary shop voltmeter will not give an accurate reading because
its resistance is too low. Therefore, a 10 megohm input impedance digital voltmeter is required to assure accurate voltage readings.

Engine Control Module|Testing and Inspection > < Diagram Information and Instructions|Page 228