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Home >> GMC >> 1993 >> Jimmy Typhoon >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> C-4, Basic Ignition System Checks (Gasoline) >> HEI-Est Distributor >> Ignition Coil Power Source
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Ignition Coil Power Source

Turn ignition on. Use voltmeter to check voltage between terminal "B" of ignition coil and ground. If battery voltage does not exist, check for open circuit, blown ignition fuse or defective ignition switch.