Distributor Cap: Testing and Inspection

1. Inspect distributor cap for cracks or damaged terminals and carbon tracking. Replace as needed.
2. Inspect rotor for cracks or roughened surfaces. Scrape off carbon deposits and smooth rotor terminal with an oil stone or sand paper. Replace rotor if insulator contacts are burned.
3. Check ignition wires for corrosion, cracks or burned insulation, then measure ignition wire resistance using an ohmmeter. Replace wires if they are damaged or if resistance exceeds 25,000 ohms.