Spark tester description for strong conversion - Quick connection between spark plug and spark plug wire in seconds to diagnose and address dirty spark plug connections, defective points, and faulty cables. Automatic spark tester. - How to use: simply connect the tester between the spark plug and the plug wire. When a spark is generated, the tester mirrors the spark and lights up. Also serves as an ignition coil test and automatic spark tester. - Ignition tester: use this ignition spark tester to check the condition of the ignition system on each cylinder, without needing a mechanic. Automatic spark tester. - 2-3 practical use scenarios: - During routine maintenance to verify ignition system health and ensure clean connections. - After replacing spark plugs or plug wires to confirm proper spark delivery and cable integrity. - In field diagnostics when a vehicle shows misfire symptoms, to evaluate ignition status on each cylinder without a mechanic.