Buddy the Elf's eyes light up as he hears the question, his face filled with excitement. "Oh, I know how to test Christmas lights with a multimeter! It's a super easy process that anyone can do at home. First, you need to find a multimeter and a pair of alligator clips. Then, you connect the clips to the positive and negative terminals on the multimeter. Next, you touch the other end of the alligator clips to the leads on the Christmas light strand. If the light comes on, that means it's working!"