Ignition Coil: Testing and Inspection

(figure 1) Testing The Ignition Coil:

TOOLS REQUIRED (or equivalent)
^ J-39200, Digital multimeter.

IGNITION COIL TEST
1. Make sure the ignition switch is "OFF."
2. Disconnect the high voltage switch lead and wiring from the ignition coil.

CAUTION: Do not insert the J 39200 probe into the ignition coil connectors. The female terminals could be spread and deformed, resulting in intermittent operation of the coil Be sure to make contact with only the front edge of the terminals.

3. Connect an ohmmeter as shown in figure 1, step 1. Use the high scale. The reading should be infinite. If not, replace the coil.
4. Connect the ohmmeter as shown in figure 1, step 2. Use the low scale. The reading should be very low or zero. If not, replace the coil.
5. Connect the ohmmeter as shown in figure 1, step 3. Use the high scale. The meter should not read infinite. If it does, replace the coil.
6. Reconnect the high voltage switch lead and wiring to the coil.