- Automotive Spark Plug Tester: Features a high-brightness bulb for easy visibility of measurement results, ensuring accurate diagnostics for your ignition system. - Automotive Relay Tester: Operate with the engine running; simply place the grooved end of the tool over the spark plug wire and watch the bulb flash, indicating a proper spark. Ideal for quick checks of ignition performance. - Small Engine Tools: The grooved end enhances contact area between the wire and the tool, providing reliable testing results. This feature is essential for efficient troubleshooting of combustion issues. - Spark Checker: Safely tests spark plugs, spark plug wires, and ignition coils without damaging the wire insulation. This automotive circuit tester is perfect for both DIY enthusiasts and professionals. Use Scenarios: 1. Routine Maintenance: Perform regular checks on your vehicle's ignition system to prevent misfires and ensure optimal performance. 2. Diagnostic Testing: Quickly identify faults in spark plugs or wiring during troubleshooting sessions, saving time and effort in repairs. 3. Small Engine Applications: Ideal for testing spark in lawnmowers, chainsaws, and other small engines, making it a versatile tool for home mechanics. Designed for durability and ease of use, this spark plug tester is compatible with a wide range of automotive and small engine applications, making it a must-have for any toolbox.