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Ignition/Spark Plug Tester
Ignition/Spark Plug Tester
Item No.: B15AP013
. Ground tester by attaching clip to car chassis  
. Start engine  
. Beginning at distributor, place groove end of tester over plug wire and slide towards spark plug  
. Tester light shound flash as you move plug down wire,if light stops flashing, this indicates a break in the wire  
. Fouled plug are indicated if tester flashes down the comlete length of wire but fails to flash at plug