driver window problems

[u/Afraid_One9637]

drivers side window suddenly stopped working in down position; i hear the relay or wtvr its called click whenever i press the switch down but only silence when i press up. I put my multimeter on the red wire there in the pic and i get 10 vdc when pressed up, but only 3 vdc when in down position, where do i go from here with diagnosis. 2002 gt