Odd power window issue

[MyFirstPony]

Hi,

My convertible 2016 GT has developed a strange problem.

After driving for a short time the window on the drivers side won't go down when using the switch. If I press and hold (approx 1-1.5 seconds) and then try again straight away it will go up/down. If it's held too long it doesn't work on the next press and the next press needs to be immediately after releasing for it to work.

The window will go down no problem when press/hold the unlock button on the keyfob. It will also go down no problem when I unlatch the roof and press the 'fold roof' switch.

When the window is down I can push the switch to lower window over and over and I can hear some noise like a relay reacting immediately to the toggle switch.

I have tried training the window again (up, hold until click / 2s then down, hold) over and over but it doesn't do anything. I have also swapped out the window switch itself as I narrowed it down to only being problematic when using that switch - but it suffers the same fault.

Anyone have any idea what might be causing it? The window motor seems to be fine but the command to raise/lower the window from the door switch just seems to not get through unless I press and hold it first. It's never got stuck up/down but it's a nuisance. The rest of the switches work effortlessly in the switch unit.

Before I go chasing the wrong solution does anyone have any ideas?

Thanks

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[br_an]

Could be a faulty switch or loose connection

 

[#1ford]

You could try contact cleaner?

 

[MyFirstPony]

Hey. Thanks for the reply.

I have already swapped out the switch for one from a wrecked car. No visible damage or corrosion on the plug and the same fault appears with both switches. Fair enough it's not a new switch but I think it would be too big a coincidence for the two switches to have the same fault =\

Had a look at the PCB inside the window switch module and nothing looks untoward. I really don't think it's the switch itself which is the main reason I'm putting the feelers out before pulling the door apart...

 

[Call_Me_Bruce]

would recommend on getting a wiring diagram and trace the wiring before pulling the door apart. See if there are any splices, connectors, or other parts that are between the switch and door. Eliminate those first.

 

[Cobra Jet]

Check this thread regarding power window issues for convertible:
https://www.mustang6g.com/forums/th...2017-mustang-convertible.163938/#post-3356187

 

[MyFirstPony]

Thanks for the link Cobra Jet. Some of that I had seen before when I was checking for a fix and other bits are new.

My current feeling is that by pressing/holding the button for 1 second and then immediately commanding the up/down again it over-rides some sort of soft-lock/protection. But then I think the convertibles don't have the one-touch up feature because there is no pinch protection on the way up - so it doesn't really make sense =\

The fact the window motor works flawlessly when instructed from either the ragtop switch or the keyfob but doesn't work with 2 separate window switches is confusing me. Also the fact the master window switch will cause some relay to click in the door reliably (after doing the 1 second 'precharge') It makes me feel like this is a software issue.

I guess I'll have to take it to Ford to sort it; although I resent giving them the money since it reliably works with the workaround I'll update this thread with any further info I get incase someone else runs into this issue.

If anyone has access to the wiring schematics and can upload that it would be great. The breakdown is somewhere between the master window switch and the motor on the RHS.

Cheers

 

[Ccul]

Hi, have you managed to resolve this.
I have a very similar proble.
The LHS window only goes down from the roof switch but goes back up from the 2 door switches.

 

[MyFirstPony]

Nope. I have noticed it getting a bit better behaved in this hot weather though. I can’t understand why (because it really feels like a reproducible software issue) but I’m beginning to think that it’s worth looking at the plugs/harness behind the door card.

I also notice that the window is pretty wet any time it goes down/up which is particularly annoying as I need to keep on top of cleaning them!

 

[Expat]

I had the same problem on the passenger door within a few weeks of purchasing the new car. I took it to three dealers, one actually cut and spliced wires, keeping the car for several days, without fixing the issue. My Folsom Lake dealer replaced the wiring harness, 16,000 miles and just over 12 months the issue has been resolved.

 

[pike1346]

Thanks for the update. I am having the same exact issue. I swapped the switch out 3 times, cleaned the contacts repeatedly. I hate bringing my car to the dealership, so I am trying to figure this out myself. I have a feeling its the harness too. I have issues with both left and right windows. Sucks. Every Ford someone in my family has had, had power window issues. You would think they would know how to make a more reliable system, but they probably make lots of money fixing windows issues…. Fords way of doing business IMO

 

[K4fxd]

It is probably the same issue the coups have. Water gets into the plug to the window motor. This causes the window to randomly go up and down on the coups. The fix is to replace the motor and dry and add dielectric grease to the plug.

I at first thought we only needed to dry and pack the plug but the water shorts out something in the motor logic card.

 

[Expat]

My issue was repaired under warranty by replacing the door wiring harness. Best of luck.

 

[ou18]

Just came across this thread, have been searching for answers to this issue with my driver side window on my coupe. The driver side power window will not work from the switch, HOWEVER the passenger side window can be triggered from the driver side switch cluster.

If I attach a light probe , and ground that probe to the chasis , and touch the pin with the probe to put the window down it works then touch the up pin and it works .

Without the probe ungrounded to the chasis, it does not work.

Looks like k4fxd may have the answer. Maybe something shorted out the control mechanism in my motor, and thats why when I ground the probe and touch one of the pins to trigger the up or down of the window, the window works. Remove the ground scenario , touch the pins , trigger the switch , window does nothing. ONLY when the light probe is grounded to the chasis does it work.

Any of you smarter than I individuals think this is a sound conclusion and I need to replace the motor because the control mechanism in the motor shorted and is not grounding.

Are there any other tests I can do to definitely identify this issue.

Any help or direction at all is greatly appreciated.

 

[K4fxd]

Will it work if you run a jumper wire to ground from the same terminal on the switch?

I misunderstood. you are not working the switch when this happens. I'd have to look at a schematic but it sounds like a bad switch or a broken wire to ground.

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