Ignition Coil: Testing and Inspection

Ignition Coil Tests:

1. With ignition switch in the off position, disconnect the primary wires from the ignition coil.

2. Using an appropriate ohm meter with a minimum of 10 megohm impedance, connect the test leads to the primary coil terminals.
Primary Coil Resistance
Standard Value: 0.77 - 0.95 ohm

3. Connect the ohm meter leads between the positive primary terminal and the secondary high voltage terminal.
Secondary Coil Resistance
Standard Value: 10.3k - 13.9k ohms

4. Inspect the primary and secondary coil connections.

5. Inspect the ignition coil for signs of physical damage such as:
Cracks in the case
Signs of leakage
Carbon tracks
Burned, melted or discolored plastic

6. If any of the above test results are not within specifications or physical damage is apparent, replace the ignition coil.