Tru-Spark Ignition Firing Indicator Cat. No. GB-66331

$28.50

Quickly and accurately test DIS and other ignition systems for the presence of secondary voltage without piercing or removing spark plug wires. Great for troubleshooting "no-starts." Sensitivity Adjustment Dial is a Calterm exclusive feature that allows isolation of a specific plug wire and eliminates false signals from wires routed in close proximity 360 deg high visibility indicator so that technician's hand will not obstruct view Green LED indicates that the tester and batteries are operating properly Red LED flashes each time voltage is released from the coil through the spark plug wire Rugged high impact ABS housing resists oil and endures shop conditions Compact design with pocket clip Operates from three 1.5 V button cell batteries (included)