Inline Ignition Spark Tester
- Checks whether there is high tensionspark potential at the spark plug
- "˜"˜Hands free"™"™ operation means no risk of electric shock to user
- Ideal for modern vehicles with sensitiveelectronics
- Easy to use - Remove rubber boot from spark plug, insert inline tester & place tester boot on plug.
Turn the engine over - Tester light will glow if ignition spark is being sent to the cylinder.