Car Spark Plug Test Pen – Quick and Reliable Ignition System Diagnostic Tool Key Features: **Accurate Testing**: Instantly check if a spark plug is functioning correctly. Quickly determines the condition of spark plugs, spark plug wires, and ignition coils without piercing or damaging the wires. **Versatile Use**: Suitable for testing in car ignition systems and circuit breakers, ideal for professional mechanics and vehicle maintenance. **Efficient Pen Design**: Compact penstyle body for easy handling. The grooved end increases contact area for better connection, while the brightness bulb ensures test results are visible even in lowlight conditions. **Portable and Convenient**: Lightweight and only 4.84 inches (123 mm) in length, making it easy to carry in a pocket or tool pouch. Includes a clip for secure storage on clothing or tool belts. How to Use: 1. Start the engine. 2. Place the notched end of the test pen onto the spark plug wire. 3. If the bulb flashes, it confirms that the spark plug wire is carrying the ignition signal. Applications: **Routine Vehicle Maintenance**: Quickly check spark plug health during scheduled servicing to prevent misfires and engine performance issues. **Troubleshooting Ignition Problems**: Instantly identify faulty spark plugs, wires, or coils when experiencing rough engine starts or loss of power. **OntheRoad Repairs**: Lightweight and pocketsized, allowing fast diagnostics anywhere without special equipment. Package Included: 1 x Car Spark Plug Test Pen (Length: 4.84 inches / 123 mm) Designed for ease of use, accuracy, and portability, this spark plug test pen is a practical tool for efficient diagnostics and reliable vehicle performance.