Ignition Coil: Testing and Inspection

CAUTION: Always turn ignition OFF when connecting or disconnecting terminals.
Be sure to check the integrity of the wires, connectors, ignition switch, battery terminals and fuses before replacing an expensive component.

Ignition Coil:

1. Connect a voltmeter between coil (+) terminal and ground.
2. Turn ignition to the ON position. Reading should be:

Approx. 12 volts

If not, check wiring, connectors (incl. battery terminals), fuse and ignition switch. Repair as needed and retest.
3. Turn ignition OFF.
4. Disconnect all wires to the ignition coil.

Checking Coil Between Terminals 1 And 4:

5. Connect an ohmmeter between (-) terminal and (+) terminal. Reading should be:

0.5 ohm ± 10%

If not, replace and retest with new coil.

Checking Coil Between Terminals 1 And 4:

6. Connect the ohmmeter between (-) terminal and (center). Reading should be:

6000 ohm ± 10%

If not, replace and retest with new coil.
7. If coil passes test, it is in good operating condition.
8. Reconnect all connectors.