You may have a burnt switch, a broken wire in the vicinity of the door pillar to the door, where it opens and closes or possibly dirty contacts in the switch itself. which you can remedy by getting the test light, holding or taping the switch in the up position and probe the wires at the switch,if the light comes on you have power to the switch which means everything is ok up to the switch.can try probing wires from switch to window motor to see if power is going to motor . if not problem is in switch,could try carefully taking switch apart and cleaning the contacts,if still not working could be issue with window motor . no light= no power, probably a broken wire , or you could try your local ford dealer and although it may cost a bit atleast it'll be fixed properly. and mabey have a warranty on the new parts if needed.