Quick procedure for testing an Ignition Coil.
1.Set meter to read ohms and set range if it does not Auto-Range.
2. Measure Primary side resistance across the positive and negative terminals. Coils designed for electronic ignition will read anywhere from .5 to 3 ohms. Coils designed for points will typically read in the 3-5 ohms range. Check specs for your coil to determine a good reading.
3. Place meter leads on positive side terminal and coil output terminal. Be sure the lead is touching the metal barrel inside the coil output. Most coils are good if they test around 10,000 ohms (10.0 K-ohms) Check the specs for your coil