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PATH:Engine ElectricalDistributor Ignition SystemIgnition CoilTesting

Testing

Animations and Tech Tips


Click to view: Ignition coil operation
Click to view: Checking coil power with a test light

Make sure the ignition switch is OFF.

  1. Tag and disconnect the wires from the ignition coil.
  2. Using a digital ohmmeter set on the high scale, probe the ignition coil as shown in Step 1 of the accompanying illustration.

Ignition coil testing points
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  1. The reading should be infinite. If not replace the coil.
  2. Using the low scale of the ohmmeter, probe the ignition coil as shown in Step 2 of the accompanying illustration. The reading should be 0.1 ohms, if not replace the coil.
  3. Using the high scale of the ohmmeter, probe the ignition coil as shown in Step 3 of the accompanying illustration. The reading should be 5k-25k ohms, if not replace the coil.
  4. Reconnect the wires to the ignition coil.

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