Ignition Coil: Testing and Inspection

To check the ignition coil





1 Disconnect the reads.

2 Measure the resistance in the primary winding across terminal 1 (-) and terminal 15 (+).

The resistance should be 0.52- 0.76 ohm.

3 Measure the resistance in the secondary winding across terminal 1 (-) and the HT terminal.

The resistance should be 7.2 - 8.2 kohm.

4 Measure the performance of the coil either in volts or by measuring the length of the spark.

Note: Faults often occur only when the ignition coil is warm. When in doubt, mount the coil on a test bench and leave it switched on under load for about half an hour. The coil should still operate perfectly after this time.