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Home >> Infiniti >> 1990 >> Q45 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> Optical Ignition System Checks (M30) >> Ignition Coil Power Source

Ignition Coil Power Source

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  1. Disconnect ignition coil harness connector. Turn ignition switch on. Using voltmeter, check voltage between ignition coil harness connector terminal "a" and ground. Battery voltage should be present.
  2. If battery voltage is not present, check harness connectors. Check harness continuity between ignition coil and ignition switch. Repair or replace as necessary.
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