Power Windows Suddenly Stopped Working--Again

[donalds]

I went to the junkyard and pulled a engine harness
all the colors are there and all the different gauges you will need to
This was part of my supercharger install

 

[mweiss]

If only I knew which wire to probe!
I undid that firewall connection (gee there's a LOT of contacts in there!) sprayed some contact cleaner, despite it looking pristine and put it back together.
Windows didn't work, but wipers at least did.

Today, I went out to move the vehicle as I have a buyer coming to look at it today and when I got in and started the vehicle, I checked the windows and they worked. The wipers worked too. I pulled the vehicle forward and backed it up into a new spot. Tried the windows again and this time they did NOT work. Wipers still worked. This is very weird. I did not open or close the door in between the time the windows worked and stopped working.