Front Window Contols
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Cargo Master
Joined: Jan 2007
Posts: 2,243
Likes: 79
From: Roman Forest, TX
UPDATE! I finally took my truck in for a few things (oil/filter change, a couple of recalls and CSP's). I had them look at the window/mirror control issue, and of course, it was all working when they got to it. So they could not duplicate...therefore, there was no issue. So I signed all the paperwork and started driving home. I got out of the parking lot of my dealer before I remembered to check the controls. And BAM! They didn't work. So I circled around and got the service adviser out there to confirm the issue. He took it back to the service tech, and after about a 20 minute wait, the SA comes back and says it is the Body Control Module (BCM). It is getting wet, and causing the malfunction. So, I have my truck for the moment, as the BCM is on order. When it comes in, they will trace the leak first, then put in the new BCM. And all under warranty, luckily. So, the wait begins until the BCM comes in. More updates to come.
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Cargo Master
Joined: Jan 2007
Posts: 2,243
Likes: 79
From: Roman Forest, TX
Update #2. The new BCM came in, and was swapped in. There was no evidence of water intrusion. The write-up just indicated some "shorting" in the BCM. Brought the truck home and all was well. Fired it up this morning, and the problem returned. So, back to the dealer, when he returns my phone call anyway. And I get my Charger out of the shop getting the leaking windshield wiper system repaired. Which was after getting a flat tire on it replaced (big *** screw in the edge of the tire). Yeah...it's not been a good week!
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Cargo Master
Joined: Jan 2007
Posts: 2,243
Likes: 79
From: Roman Forest, TX
Alright, update #3. I have the truck back. This time they repaired a wire in the wiring harness to the driver's side window/mirror control unit. So they found a wire loos in the wire loom going to the front window controls. Everything is working now. I'll keep y'all updated. Hopefully this is it.
Mountain Pass
Joined: Oct 2015
Posts: 239
Likes: 43
I've done some mods to my mirrors and doors so I want to be prepared if this problem surfaces.
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Cargo Master
Joined: Jan 2007
Posts: 2,243
Likes: 79
From: Roman Forest, TX
Just curious, what kind of mods have you done to your mirrors and doors?
Mountain Pass
Joined: Oct 2015
Posts: 239
Likes: 43
I installed Muth mirrors that have illuminated signal arrows, smoke marker lights, and the doors are covered inside and out with sound-treatment. As soon as you take the door card off you'd know I was in there messing around so I'm expecting some silliness from the dealer every time I go in. They've made a habit of adding everything they find to the computer record of the truck "...in case there's ever a warranty problem." I could bet a paycheck that's not for my benefit, but I digress.
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4th Gear
Joined: Jun 2022
Posts: 4
Likes: 0
Need Help with Power Windows AND Door Locks
This thread has been insightful. I want to run you all through my specific scenario in hopes someone can help me pinpoint the probable cause.
I don’t know where the fuse is for the windows, but I read on a forum that there’s 1 fuse for all the windows (at least all 4 cab windows, no french fry window mentioned).
Any help of where to start and to trouble shoot would be massively helpful. Sorry for the super long description. I don’t have time or money to waste and I’m not under warranty. (Got her used about 2 years ago.)
- My truck is a 2016 F350 Lariat SD Quad Cab w/ 8’ bed (w/ tailgate back-up camera)
- I had to drill out rivets and remove the tailgate plastic liner to fix a busted clip for the tailgate latch-release lever; I have NOT yet replaced the rivets (therefore, I know water can easily get in the tailgate cavity in reasonable amounts)
- I hauled some rotten wood for a friend and hosed out the truck bed and tailgate
- I later hauled some mulch for the same friend while also towing a dump trailer full and hosed out the truck bed and tailgate
- This was the first time I’d connected a trailer to the wiring harness 7-pin connector at the bumper (vs. in the bed where I’ve connected my 5th wheel)
- It was after the hauling with the trailer and hosing out that the problem began
- First time it was that any of the windows I opened would open but not close (including the “French fry window” between the bed and the back seat of the cab). Initially, I waited 20-30 minutes, came back, and the windows functioned normally. The 2nd time I had the problem, I rolled them down and back up immediately. They worked fine. It was when I then rolled them back down and left them down for a while, they wouldn’t roll back up. I’d leave them alone for a while, then they’d roll back up. Times between them failing and then working varied.
- This became a consistent problem to where the windows, whichever one’s we opened would not roll back up. I don’t recall ever having a problem getting the windows to open that initial time during the day the problem would show up. But if they got stuck, they would not open further or close further. Usually, if there was an issue at all, it was with ALL 5 windows (French fry included).
- Some unknown factor would change and I always could get them back up. I’ve been dealing with a lot of other things in the course of life and have researched the issue on the side. We don’t use the truck super often so it spends a good bit of time parked during any given week. It has never been garaged or under a carport; just in the shade or under some trees more often than not.
- This past month we moved our 5th wheel to another city. We had NO problems with any of the windows during hook up and pulling out. Upon arrival the 2 fronts and the French fry got stuck in the open position. But later went up…like usual.
- However, recently, we had to move our 5th wheel from one location on the property to another. We rolled the front windows down for communication and due to the heat. The driver’s side is stuck in the full open position, the passenger is stuck in the 1/2 open position. The 2 rear windows function fine, BOTH from the driver’s side control panel AND from their individual switches (The driver’s side rear seems a little slower than the passenger’s side rear—?). The French fry window opens and closes with no problems.
- The passenger side front window doesn’t work from the passenger side switch either.
- I have lights on the driver’s side control panel. But my mirrors don’t go in and out anymore. That’s a newer problem. Last move (3 weeks ago) I believe they telescoped without problem. The electric mirror adjusters for left and right side mirrors still function fine.
- And (FINALLY) about a week after the window issue started, the power door locks stopped working BOTH from the remote on the key AND from the driver’s or passenger’s control panels. I checked the fuse for the door locks and found it blown. I pulled a good one from the amplifier slot above it, put it into the slot #20 (20 AMP fuse), and as soon as I pushed the lock button on the key faub, the new fuse blew.
I don’t know where the fuse is for the windows, but I read on a forum that there’s 1 fuse for all the windows (at least all 4 cab windows, no french fry window mentioned).
Any help of where to start and to trouble shoot would be massively helpful. Sorry for the super long description. I don’t have time or money to waste and I’m not under warranty. (Got her used about 2 years ago.)
Mountain Pass
Joined: Oct 2015
Posts: 239
Likes: 43
"I checked the fuse for the door locks and found it blown." means you have a short. My guess is that the short is messing with the CANBUS and the truck is resetting itself when the power is off. I would start with FORSCAN and check your codes now and the next time the windows go out. Finding the short is going to be tough but you'll need to chase the wires in the looms, door connections, plugs, etc. Hopefully someone with more electrical expertise will chime in on how to find the short (I do stuff the hard way).
Thread Starter
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Cargo Master
Joined: Jan 2007
Posts: 2,243
Likes: 79
From: Roman Forest, TX
As I noted in my posts above, it ended up not being the BCM in mine. After they replaced it, the next day the controls stopped working again. They then fixed it as noted in my post #19 above. But whatever the issue with yours is, I hope they get it fixed.
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