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Spark Plug Test Cable Harness and Wiring Diagram

Thursday, 18. February 2010 by Arya
Spark Plug Test Cable Harness and Wiring Diagram. To test a spark plug (car) do the following: Connect the spark plug to the high tension cable. Ground the outer electrode (main body), and crank the engine. In the atmosphere, only short sparks are produced because of the small discharge gap. If the spark plug is good, however, sparks will occur in the discharge gap (between the electrodes). Read more [...]