Ignition Coil: Testing and Inspection

1. Be sure ignition switch is OFF.
2. Connect oscilloscope to engine and check coil output to spark plugs. Should be:

10Kv Minimum

3. Use insulated pliers to disconnect one ignition lead. Open circuit should be:

25kv minimum

4. Turn ignition OFF.
5. To measure primary resistance, disconnect connector plug from coil.
6. Measure primary resistance. Should be:

.6 to .8 ohms

If outside specification, replace coil.