My son recently purchased this truck in Jan., 2017, upon inspecting the vehicle we noticed the rear driver and passenger windows would not raise or lower. When I asked the seller about this his comments were " I believe it to be a master switch issue". Ok so no big deal, I purchased and replaced the master switch with no luck. I didn't spend much time on it due to the cold weather. After digging into this a little more I'm very confused now. So here is where I currently am at with this issue. Power is not the problem, I am reading approx. 14V at the master switch and at the rear door switches. I've checked and have power when the switch is toggled to simulate raising and lower of the window (approx. 12 to 13.5V). The window lift motors have been taken out and cleaned and inspected. The motor will operate properly with a 12V battery pack (both motors, driver and passenger side). I have power all the way to the motor itself, slightly less than 14Volts. I can raise and lower the window in the truck by plugging into the back of the female connector with the outside power source but not with the power supply from the truck. I have continuity between the power(blue) and ground(black) wires at the switches. So this is where I am at, also just a reminder the front windows and door locks work fine. Just a side note, this truck has aftermarket mirrors on it so that branch of the harness is left hanging. Any help would be greatly welcomed.

 

Knowing next to nothing about the source of this problem, I cannot help but wonder if the above may be a clue?

 

I had some wires fray and eventually brake in the wire loom going from the body into the door. The problem appeared on a dark and stormy night when my passenger rolled down my left rear window and it wouldn't go back up. After trying a new master switch, new window motor, and gobs of time chasing switches, motors, all that crap. I finally thought to look at the wires in the hinge. one was broken and 3 were frayed badly and getting ready to break.

Obviously different symptoms than you are having, but worth looking into, that wiring loom is super easy to get into and check everything out.

Good luck.

 

Check your connection prongs in the switch... mine were corroded pretty bad