how to test led christmas lights with multimeter

Hello, there! It's great to hear from you. To test LED Christmas lights with a multimeter, you will need to set the multimeter to the "diode" setting and then connect the positive lead to the anode (positive) leg of the LED and the negative lead to the cathode (negative) leg of the LED. If the multimeter reads "low" or "open circuit," then the LED is not working. If it reads "high" or "closed circuit," then the LED is working properly. It's a good idea to test each LED individually to make sure they are all functioning properly. Good