Features:

• Use to quickly trouble shoot ignition system.
• Device is "hands-free".
• Connects in-line between spark plug and spark plug wire.
• Shows a duplicate view of the ignition spark.
• Technician can visually check condition of ignition system at each cylinder.
• Frequency and intensity of flash indicates whether there is an ignition system problem or a fault in the fuel delivery system.
• Flash can be seen in bright sunlight.
• Clear plastic body can withstand rough use and resists automotive chemicals.
• Protected by mechanical strain relief.
• Replacement Bulb Part No. 23904.

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