Spark Plug Wire Tester

• Test spark plug wires in a snap
• Lights up when an electrical current is detected
• Precision built to meet or exceed ANSI standards
• Strong and dependable to last a lifetime
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For easy testing of spark plug wires. Inductive design.Tester lights up when electrical current is detected.

-Fasten alligator clip end of spark plug wire tester to vehicle ground

-Position receptacle end of spark plug wire tester over spark plug wire

-With engine running, observe clear window in spark plug tester

-Light flashing indicates sound wire

-No flashing light indicates unsound wire or spark plug or connection