Can anyone tell me if the auto-down function on the driver's window is controlled entirely by the window switch. I've tried everything I could uncover here to no avail. I have also replaced the entire master switch, twice - both replacements were used, as I cannot locate a new one. Nothing has resolved the issue. If I were to disassemble the switch, is it possible to find the cause of the problem inside the switch? If not, does anyone know where I can locate a new master switch (or a used one that is in good working condition)?