I have a 99 ford F350 Superduty Dually, Its an extended cab 4 door. The issue im having is the driver window goes up and down without issues, but the passenger will not.

I replaced the motor this past saturday, and troubleshot as best i could the wiring. I took a video showing what the window is doing.

I know the motor i replaced and put in the truck is good, as i am able to put the window up and down by running 2 wires to the motor itself, and then connecting one wire to positive and one wire to ground. One way it goes up, and if i reverse them then it goes down. so the motor in there is good as best i can tell.

Here's the video. any help is greatly appreciated!

 

The only suggestion that I can throw at you is, if the driver side switch is not working you won't get power to the pass side. Everything (all switches locks, windows most be plugged, both sides) for them to work. Does the pass window work from the drivers door? If not that could possibly be in indication that the drivers switch is bad and you won't get anything to the pass side. Not a 100% sure on that but I know that when my drivers side plug for the switches was off and the pass side was plugged in, I got nothing. But please don't go buying things you may not need, hopefully someone else can chime in to confirm this or do a little more research.

 

Sorry i should have mentioned, the driver door was all plugged in during all of this testing in the video, which shows that i am getting power to the switch, as it activates the wires on the tester.

I appreciate the input. I wonder if the driver switches are bad maybe?

 

From my understanding, if the driver switches are bad the pass side won't work. But please don't go off my assumption alone. I would hate for you to run down to the local junk yard or Ford and spend all that money for nothing.

 

Here is the wiring diagram for the non crew cab models.
The passenger side switch has been known to fail from time to time on these models.

You can test for ground at the passenger side switch (Tan/Lt Blu wire). It should be grounded when the switch is at rest. Then with the key off....operate the switch and you still should have ground. If not, then that switch is bad.

If you don't have ground under either condition, then you need to look at the driver's door switch.

If the ground tests good under both conditions, then check the power side. The White/Yellow wire should have 12v when the passenger window is operated down from the driver's seat. If the LT Blu/Black wire has 12v power when the key is on...then the Red/Yellow motor wire should have 12v power when the passenger window is operated down from the passenger seat.

 

thanks so much. i will try to test out the grounds tonight when i get home.

 

Shake,

I did what you had recommended, and this is the result.





and proof i can get the motor to work up and down :

 

so as of right now, neither switch will permit the window to go up.. however theyre both letting it go down.

Interesting aside, the passenger lock button was pushed today, and locked the doors, then neither lock button worked after that. :/

i hate electrical grimlins

 

It sounds like you have grounding issues. Take the motor out, clean off where it grounds out to the door as good as you can. Clean the paint/dirt/rust/corrosion off of where the bolts that hold the motor to the door contact the door.

 

Does the White/yellow wire have continuity to ground when all the switches are at rest?

Unplug the connector at the window motor....
Then with the key on, push the down button on the passenger door.....do you get 12v power on the Yellow/Red wire?

With the window motor unplugged and the switches at rest, both the Red/Yellow and Yellow/Red wires should be grounded. Then pressing the up bottom will provide power to the Yellow/red wire while pressing down will provide power to the Red/Yellow wire.

The way the system works....both poles of both window motors (or all four motors in a crew cab model) will be grounded when all switches are at rest. When a switch is operated....it's bridged so it switches two poles at once. So for instance....
To make the passenger window roll up the Yellow/Red wire needs 12v power while the Red/Yellow wire gets grounded. When the passenger side switch is pressed UP....both poles move (because they are mechanically connected) and the terminal connected to the Yellow/Red motor wire touches the Lt Blu/Black wire (which has 12v power). Simultaneously, the terminal connected to the Red/Yellow wire moves over to another grounded terminal inside the switch.....so it merely moves from one ground to another.

To make the passenger side window roll up from the driver's switch....
The terminal connected to the Tan/Lt Blue wire touches Lt Blue/Black wire for 12v power. This has the net effect of passing 12v power through the passenger switch to the Yellow/Red wire.
At the same time, the terminal connected to the White/Yellow wire (at the driver's switch) moves from one ground to another (just like the passenger side switch does.)

The passenger side switch (as well as the rear door switches on the crew cab model) are super common across the Ford family of vehicles and are fairly inexpensive. You might try changing the switch if you suspect a fault. The driver's side switch assembly is more specific to your model and quite a bit more expensive. Luckily, the design of these systems lends itself to a problem with the simple (non-driver's) switches so the chances of the problem being there is greater (compared to the driver's switch).

The driver's window doesn't have multiple switch junctions so it's not likely to have these sorts of issues compared to the other windows.

 

I had the exact same problem....
A new passenger side switch solved my problem.

 

The window motor does not ground to the door. It's completely insulated from all mounting points. The only ground comes through the wiring. It's the only way to make the system work with multiple switch points.

 

If you look at the OP's video, there are only two wires at the power plug, so the motor must ground somewhere else.

 

The poles reverse to change direction. So one wire is positive and the other is negative. Switch the wires to run the motor the other way.

 

well i think that my video of me using my trick of connecting two wires to the motor terminals, and putting one wire to positive and one to ground, and then reversing them, to make the motor go in the other direction shows to me the motor is good, the power is good, and that it will go either way.

the first video, i have the tone light in the harness for the motor at the motor, and i press the power up and down button with the key on, when its in either side, and i press the button , im getting positive tone / light to the test light, thus showing that the motor is getting the signal at the harness with the passenger button, but yet still doesnt go up or down. which is why im so confused as to why it wont function properly.

thoughts?