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tester ??????????????


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Here is a thought... maybe.

Is it maybe a tester to see what kind of resistance there might be in the spark plug circuit? If you put an ohm meter on the ends of both wires and change the dial does the resistance change? If you were to hook up the tester in series with each spark plug individually and turn the dial until the car started to miss you would see where there is a difference in voltage/current required to jump the sparkplug until it would miss.

This might make sense since the body of the tester is a bakelite material that is used as an isulation mater in the 1950's and back..... just a thought.

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