Disassembly-free car ignition test pen
This instrument can be used to test spark plugs, coils and distributors in both the electronic ignition system and the circuit breaker. The grooved end makes the wire have a larger contact area with the instrument, and the high-brightness bulb makes the measurement easy to observe.
The grooved end makes the wire have a larger contact area with the instrument
High-brightness bulbs make test results easier to observe
With the engine started, place the grooved end of the instrument on the spark plug wire. If the lamp is flashing, it indicates that the spark plug wire is transmitting a spark signal.
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