Ignition Coil

TESTING

NOTE: The ignition coil is an integral part of the distributor.

1. Measure the resistance of the primary ignition coil as follows:
   1. Unplug the electrical connector at the distributor. Using an ohmmeter, measure the resistance between terminal 1 and terminal 2 of the distributor connector.
   2. Compare the measured reading with the desired reading of 0.9–1.2 ohms.
   3. If the actual reading differs from the desired specification, replace the ignition coil.
   4. If the measured value is within standard allowance, there are no broken wires or short circuits.

      Fig. 1: Ignition coil terminal identification

2. Measure the resistance of the secondary ignition coil as follows:
   1. Insert one of the test leads into the secondary ignition coil terminal on top of the distributor cap.
   2. Touch the second test lead to terminal 1 or terminal 2 of the distributor connector.
   3. Measure the resistance and compare to the desired specifications of 19–27 kilo-ohms.
   4. If the measured value is within standard allowance, there are no broken wires or short circuits.
   5. If the actual reading differs from the desired specification, replace the ignition coil.