How to Test Photocells | Homesteady
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Disconnect the leads to the photovoltaic cell with a screwdriver. Orient the face of the photocell toward the sky.
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Set the multimeter to its 12-volt setting.
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Touch the red positive lead of the meter to the red positive lead of the photocell. Touch the black negative lead of the meter to black negative lead of the photocell.
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Read the meter. If the meter does not produce a reading the cell is faulty.