Re: power window switch / wiring problem. Need some help
The conductors to the passenger side window switch feed through the "neutral" position of the driver side switch for the PS window. If the contacts within the DS switch for the PS window are not making good contact in the neutral position, the PS switch will not work. This can happen regardless of whether the UP/DOWN contacts of the DS switch are working or not working.
If you have access, you could use a multimeter to look for high resistance contacts within the switch.
Or just try working the DS switch for the PS window back and forth many times. If that doesn't get the PS switch working, the DS side may require replacement.
Also keep in mind that the terminals for the plug connectors on the backs of the switches live in a damp environment inside the door. Good PM is to clean the plug terminals and apply dilectric grease to the pins. Your problems could be the cumulative result of corrosion on the terminals in one or both plug connectors and any of the contacts inside the switches.
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2003 XLT 2.3L M5OD-R1 reg cab beater, 2011 Taurus SEL, 2016 C-MAX Energi Plug-in Hybrid