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This compact, handy circuit tester checks 6 and 12 volt circuits for voltage, and also spark plug wires for spark. Super simple to use: just ground the alligator clip and touch the probe top the point being tested. If voltage is present the light bulb lights. For testing spark plug circuits, screw the probe into the other side of the handle, and a separate light bulb lights to indicate voltage. a 4" long lead adds reach, while the durable ABS handle is crystal clear for easy spotting of the light bulbs.
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