how to test christmas tree lights with multimeter

You can test Christmas tree lights with a multimeter by following these steps: 1) Unplug the lights from the outlet. 2) Set the multimeter to the "Ohms" setting. 3) Touch the probes of the multimeter to the two ends of each light bulb. 4) If the multimeter shows no resistance, then the light bulb is likely burnt out. 5) Test each light bulb in this way until you find the one that is not working.