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Home >> Honda >> 1989 >> Civic Si >> Repair and Diagnosis >> Engine Performance >> System >> Basic Testing >> Ignition Checks >> Electronic Ignition System >> Ignition Coil Power Source

Ignition Coil Power Source

  1. Remove distributor cap to check power source directly at coil. See Figure . Disconnect ignition coil primary leads. Turn ignition on. Using voltmeter, check voltage between ground and Black/Yellow wire terminal of ignition coil harness.
  2. Battery voltage should exist. If not, check for open in Black/Yellow wire between coil and ignition switch. On some models, an in-line radio noise condenser (mounted on distributor or near coil) is utilized. If condenser shorts out, power supply will be interrupted and vehicle will not start.
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