Power window fix
My drivers window would not always work. After the truck would sit overnight the window would work a couple times. I could bang the lower part of the door around the window motor and half the time that would work.
I found out through a roundabout way and after a couple different part purchases that the problem was that one of the brushes on the electric motor would jam (carbon dust build up) and the spring could not keep it against the commutator. A little Electra-Clean and it worked fine.
You'll have to pull the motor off the actuator to get to the brushes.
"Put all your eggs in one basket, and then watch that basket" - Pudd'nhead Wilson