Engineered with a grooved end for non-puncturing contact, this spark indicator tests spark plugs, wires, and coils while the engine is running. The tool identifies ignition issues by flashing an internal bulb when a spark is detected, allowing for diagnostic checks without damaging wire insulation. This 1 oz (28.3 g) indicator provides a quick visual confirmation of ignition system performance.

Engineered with a grooved end for non-puncturing contact, this spark indicator tests spark plugs, wires, and coils while the engine is running. The tool identifies ignition issues by flashing an internal bulb when a spark is detected, allowing for diagnostic checks without damaging wire insulation. This 1 oz (28.3 g) indicator provides a quick visual confirmation of ignition system performance.