My rear passenger window goes down, but not up in my 04 SCab, so i checked on the weekend and held one lead of a DMM in the wiring harness at the window motor, and grounded out the other lead on the door. I checked that door switch both ways and had just under 12V, so i found myself the motor and regulator assembly from a wrecker.
Today i put in the used one from the wrecker and the same thing, down but no up. I bench tested the original motor and i COULD get it to go up and down on the bench. I was looking at a wiring diagram of this system and it looks like it could be something inside the drivers door switch (ie: a ground). Does this sound right to anybody?
Thanks for your help
Scooter

 

Scooter, anythings possible.

I used to have a Nisson Frontier. Suddenly, I found the left rear window would not work from my driver's switch. It worked fine from the left rear door switch though.

I finally took the driver's door switch assembly apart. After careful study, with a magnifying glass, I found a broken circuit board wire. I was able to solder a "jumper" wire in over the break and, voila! Everything was back to normal.

It stayed good for the rest of the time I owned it.

My point is, we have VERY complicated electronics in our trucks now. I'd suspect a problem either in your switch or in the circuit board it connects to.

- Jack

 

Thanks for your reply Jack,
It turns out (after spending some quality time with my DMM) that the problem is in the master switch in the drivers door. So now i get to start shopping for a drivers door window master switch. My truck has the window lock-out, and all four window switches as the same component ( i imagine most are the same). Maybe this is a blessing in disguise because the LED in thee switches themselves have never worked, so i get to replace one component and fix 2 problems!
Thanks again,
Scooter

 

Yuk! My guess is, this is not an inexpensive item!

Try some junkyards. It's a pain, but it could save some BIG bucks.

In the bad old days, about 20 years ago, I used to be a confirmed Ford guy. But then I got tired of the problems with the alternators, power steering pumps, door lock actuators and power window systems. Many of these problems I could fix myself, but others....

So I went to Hondas, Toyotas, Masdas, and Nissans. Surprise! They didn't seem to have these chronic problems at all (except for Toyota - air conditioning and bad contacts in the brake light sockets).

Now I've got a Ford again - for it's towing capacity. I can hardly wait for the "shoe to drop".

- Jack