Connect the tool between the spark plug and the plug wire. With the engine running, the tool flashes a mirrorimage of the ignition spark.
Lisle InLine Spark Tester w/ Coil-On-Plug Wire
Lisle Inline Spark Tester 20610 New In Package
Lisle 20610 Inline Spark Tester Ignition Spark Plug Diagnostic Tool New Sealed
Lisle Tools 20610 - Inline Spark Tester (One Size Factory)
Lisle 20610 Inline Spark Tester, Double Ended Straight Boot and 90 Degree Boot
Lisle Corporation 20610 Inline Spark Tester, 90 Deg. Or Straight
