Your window regulator is most likely snagged on something. As a motor gets loaded(when it gets jammed) it draws more current and that would expalain your diming lights.
if it makes a sound most likely it is the regulator. try removing the door cover and, watching your fingers carefully, try to free it. the motor is very powerfull and the regulator design is like a scissors so be careful!
if it makes a thump thump thump sound when it goes up, the rivets have broken off and the gear is misaligned.