If you turn the key on, engine off and hit the switch up or down you can
watch for the dome lite to dim slightly as the switch is depressed. If this
occurs then you know the window motor/window could be jammed. slam the door
as you are holding the switch in the down position  and see if the window
starts to operate. other then that you will have to remove the door panel
and using a test lite/volt meter check for the proper ground and voltage

Glenn Beasley
Chrysler Tech