1 PC Car Spark Ignition Tester Pen, High-Voltage Line Cylinder Line Spark Plug Detection Tool, No Disassembly and No Damage Test with High-Brightness Light Bulb, Universal for Cars

This ignition test pen is an efficient diagnostic tool for quickly checking high-voltage spark in your vehicle's ignition system—no disassembly required.It detects ignition pulses by clipping onto a live spark plug wire or coil, causing its internal bulb to flash in sync with the engine’s spark, visually confirming electrical activity.The grooved tip design allows a secure grip on ignition wires of various sizes, maintaining solid contact and ensuring reliable readings even during engine vibration.To operate, start the engine and place the grooved end against the ignition wire or coil boot. A steady flash indicates proper signal; no light suggests a circuit fault.Included is one multicolored test pen (approx. 4.84" / 123mm). It’s a practical, time-saving tool ideal for DIYers and mechanics to conduct safe preliminary ignition checks.

• Quick Non-Disassembly Testing: Test for ignition spark instantly without removing parts. Simply clip the pen onto a spark plug wire or coil with the engine running.
• Clear Visual Indication: A built-in high-brightness bulb flashes to provide immediate visual confirmation of a working ignition pulse, enabling intuitive fault detection.
• Grooved Tip for Secure Contact: The slotted tip increases contact area with ignition wires, ensuring a stable connection and reliable results even during engine vibration.
• Portable & Durable Design: Compact pen-style design with a pocket clip for easy carrying. The insulated ABS housing is heat-resistant and tough enough for under-hood use.
• Wide Diagnostic Application: A versatile tool for testing ignition coils, spark plug wires, and distributor caps to help quickly locate issues within the ignition system.