The Laser Tools 2780 provides a safe and easy way to check for a "fat, blue spark" without the risk of an electric shock. By connecting this tool in-line between the HT lead and the spark plug, UK mechanics can instantly verify if the ignition system is delivering enough voltage to fire the engine. It is an essential tool for diagnosing misfires. For checking the rest of the electrical system's current draw, consider the Automotive Current Tester.
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