Tools Required

J 39200 Digital Multimeter

1. Remove the spark plug wire to be tested.

Ensure that the plug wire terminals are clean before proceeding.

2. Use the J 39200 .
3. Connect an ohmmeter lead to each end of the plug wire.
4. Gently twist the wire while watching the ohmmeter reading.
5. If the ohmmeter reads above 700 ohms, replace the wire.