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Home >> Geo >> 1990 >> Metro Base, 2D Hatchback, Standard >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls - System/Component Tests >> Computerized Engine Controls >> Electronic Control Module (ECM) >> Power Circuit Checks
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Power Circuit Checks

Using DVOM, check power circuits to ECM for opens or shorts. See appropriate wiring diagram in WIRING DIAGRAMS article.