Intermittent Windows

Hey guys,

So this is a really annoying problem I keep having - my drivers side electric window sometimes gets stuck down. Then after a random amount of time, will start working again. Same thing started happening on the rear drivers side too! I have no idea what causes it, but they will go down and then refuse to come back up? I can't figure out whats wrong. When they're stuck down, and you press the switch to go down you can hear a small clunk, like the motor is getting engaged or something, but when you press up, nothing.
And then without doing anything, sometimes after a couple of minutes, sometimes after an hour, you press up and it just works. Any ideas?
Its a really irritating issue, especially if it happens at the end of a drive and I want to park the car!

Cheers,
Stephen

Discovery 2 TD5

If you say "I have no idea what causes it" unless someone has a crystal ball u have a problem, I suggest you remove the door card and have a look at the regulator function and all the other stuff within the door.

I went through a period of an intermittent driver's window which finally failed altogether.
I traced it to a broken wire inside the little rubber tube grommet between the door and the doorframe. As the door was closing the wire would just make enough of a contact for the motor to work and as I opened the door it the break would open preventing the motor from working again. Went on like that for weeks.
There's no up and down motors, it's a single motor and the power feed to it is switched one way or the other by the BCU to wind up or down.

DRY joints in the BCU ! there are theads on here that explain wot you need to do to fix !
Look up electric window probs or words to that effect !

Steve

discool said:

If you say "I have no idea what causes it" unless someone has a crystal ball u have a problem, I suggest you remove the door card and have a look at the regulator function and all the other stuff within the door.

Click to expand...

Well I was after suggestions as to where to look for possible causes...as I don't know much about these things.

brian47 said:

I went through a period of an intermittent driver's window which finally failed altogether.
I traced it to a broken wire inside the little rubber tube grommet between the door and the doorframe. As the door was closing the wire would just make enough of a contact for the motor to work and as I opened the door it the break would open preventing the motor from working again. Went on like that for weeks.
There's no up and down motors, it's a single motor and the power feed to it is switched one way or the other by the BCU to wind up or down.

Click to expand...

Interesting! I did check with the door open/closed/opening/closing etc at the time and it didn't seem to make a difference, and I had a poke about with the wires behind the door card just in case but it all seemed fine. The thing is the car hadn't moved or even been started - I gave up and left it, came back after an hour or so, turned the key just to get the electrics on, and then it worked? So I don't think its wiring? Or could it still be, I don't really know much!

Magicgrotto said:

DRY joints in the BCU ! there are theads on here that explain wot you need to do to fix !
Look up electric window probs or words to that effect !

Steve

Click to expand...

Interesting, thanks for that. Will do!

Magicgrotto said:

DRY joints in the BCU ! there are theads on here that explain wot you need to do to fix !
Look up electric window probs or words to that effect !

Steve

Click to expand...

That would be a good point if it was only about front windows but the BCU has nothing to do with rear ones, the rears are managed by the IDM but the IDM has nothing to do with front ones, a common problem can be within the interior fusebox or at the common earth point, give some contact spray there(pic attached) for the beginning and inspect the interior fusebox's plugs for corrosion cos water ingress in it is not uncommon, disconnect battery before you start unplugging that fusebox... a wiring issue is quite unlikely cos the motors are fed through the same two wires by reversing polarity for up/down if you see what i mean

could be as simple as the switches i done a guide couple of weeks back on how to clean them https://www.landyzone.co.uk/land-rover/window-switch-cleaning.301171/

first thing i would try is swap the switches around see if that makes the intermittent ones work and the others intermittent, might not be the problem bit its free and only takes 10-15 mins to check

good luck sorting them i still haven't got round to sorting the rears on mine but since cleaning the switches my front windows have been perfect.