Ignition Cable: Testing and Inspection

TOOLS REQUIRED
J 39200 Digital Multimeter

1. Check the routing of the wires. Improper routing can cause crossfiring.
2. Check each wire for any signs of cracks or splits in the wire.
3. Inspect each boot for signs of tears piercing, arc through, or carbon tracking. If the boot needs to be replaced, twist it a half turn in either direction to break the seal before pulling on the boot in order to remove the wire.

Spark Plug Wire Resistance Check
1. Disconnect both ends of each wire. Make sure the wire terminals are clean.
2. Set an ohmmeter on the high scale and connect it to each end of the wire being tested. Twist the wire gently while watching the ohmmeter.
3. It the ohmmeter reads above 30,000 ohms (no matter how long the wire is), or fluctuates from infinity to any value, replace the wire.
4. It the resistance of any wire is not within the following ranges, replace the wire being tested.
^ 0 to 15 inch wire - 3,000 to 10.000 ohms.
^ 15 to 25 inch wire - 4,000 to 15,000 ohms.
^ 25 to 35 inch wire - 6,000 to 20,000 ohms.
^ Longer wire - should measure about 5,000 to 10,000 ohms per foot.