Spark Plug Wire Resistance Check
- Remove distributor cap and disconnect spark plug end of suspected wire or wires. Connect ohmmeter leads to spark plug terminal and terminal inside distributor cap (each end of wire).CAUTION: Never puncture a spark plug wire when measuring resistance.
- If resistance is less than 5, 000 ohms per inch, visually inspect wires for damage and remove spark plug for inspection and/or replacement. If resistance is greater than 5, 000 ohms per inch, disconnect suspected wire from distributor cap and again connect leads to each end of wire.
- If resistance is now less than 5, 000 ohms per inch, inspect distributor cap and spark plug wire terminals for damage. Repair as necessary. If resistance is still greater than 5, 000 ohms per inch, replace wire(s).