Thanks for this useful post, but I have a question about the premise. If the actuator isn't working, the problem could either be with the actuator itself, or with the door module on the window switch, right? It still makes sense to try to jumper the module first, before taking of the door panel to access the actuator, but a non-functioning actuator is not a guarantee that the problem is with the source of the signal to the actuator, namely the door module, right?

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2003 X5 4.4i
1992 Porsche 968
2007 328i
2014 Subaru Forester XT