Turn the key switch 4 clockwise to turn on tester, indicator 3 will light up, tester is now working at. Place the Spark Plug into tester hole 1 or 2; If you want to compare the new spark plug and old one.
Ignition Tester, Spark Tester, Spark Plug Tester, Ignition System Coil Car, Ignition...
Ignition Spark Tester, Ignition Tester Spark Plug Tester, Ignition System Coil Car Vehicle...
Ignition Tester Spark Plug Engine Analyzer Adjustable Dual Hole For Car Auto
Car Spark Plug Tester Ignition Tester Spark Plug Analyzer Detector
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