- Connection and indication: Place the tester between the spark plug and the spark plug cable. When the engine fires and a spark is produced, the tester reflects the spark and lights up. - Automatic spark tester: Visual, on-vehicle spark indication without tools or disassembly. Designed to show the presence of ignition spark automatically. - Ignition coil test capability: Use this tester to check the condition of the ignition system on each cylinder without visiting a mechanic. It supports quick verification of ignition coil performance. - Easy installation: Simple plug-in connection between the spark plug and the spark plug cable. No extra tools required for setup. - Practical diagnostics: Helps identify issues such as bad spark, weak spark, or faulty ignition coil by providing direct visual feedback at the spark source. - Use scenarios: - On a multi-cylinder vehicle during routine maintenance to verify that each cylinder is receiving a spark. - During troubleshooting of misfires or poor engine performance to quickly locate a faulty cylinder or ignition coil. - In a repair shop or field situation to confirm ignition system operation without disassembly. - Key attributes at a glance: - Function: visual spark indication and ignition coil testing on each cylinder. - Compatibility: designed to connect directly between the spark plug and its cable. - Usage: suitable for on-vehicle diagnostics to assess ignition system health. - Performance: provides immediate, automatic feedback when a spark is produced.