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Home >> Saab >> 1991 >> 900 SPG >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Computerized Engine Controls >> EZK Ignition Control Unit >> 900 Series Power Circuit
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900 Series Power Circuit

Turn ignition on. Check for battery voltage between ECU terminal No. 6 (Green/White wire) and ground. If battery voltage is not present, check fuse No. 3. Fuse panel is located in left side of engine compartment. If fuse is okay, check for open Green/White wire between fuse panel and ECU terminal No. 6, or for a defective ignition switch.