July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Spark Tester

Use either a spark tester tool or modify a spark plug (cut off side terminal and install spring clip for grounding plug housing) for use in testing ignition system. See Fig 1.

Fig 1: Modified Spark Plug & Spark Tester. Spark Plug Modified by Cutting Off Side Terminal and Installing Spring Clip

Courtesy of FORD MOTOR CO.