By connecting the flying lead to an earth ground reference and touching the screwdriver tip to various points in the circuit the presence or.
Light bulb test circuit.
The test light is an electric lamp connected with one or two insulated wire leads.
How to test complete circuits in fluorescent fixtures this can be done in two ways.
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Often it takes the form of a screwdriver with the lamp connected between the tip of the screwdriver and a single lead that projects out the back of the screwdriver.
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