Did you try using the driver door and pasenger door switch separately?
Do you hear any motor noises within the door while operating the switches?
Are you able to get it going further down?
If the motor can still function, the problem is with the switches and can either be from the master or passenger switch.
Try swapping with driver side rear door switch to get it up.
If this does not work, you would need to remove the door panel and disconnect the motor wires and apply battery voltage to the terminals and grounding the other wire. Reversing the polarity would get the glass up or down.
Sunday, December 23rd, 2012 AT 9:07 PM