towsey956

towsey956

Well-Known Member
hi there

I've got a '98my disco and for some reason the rear windows don't work all the time. Sometimes pressing and holding the button makes them work, and daft as it sounds sometimes if you play with the switches (both rears do the same thing) then wait a few minutes then they will work, almost like your giving them a warning you want them to work ha. I've had a play with the power probe and even changed the window lift module behind the glove box but nothing has changed

I just wondered if there was a common thing or place to start looking for a fault or dodgy wire before I start the possibly long search from start to finish

Thanks

Towsey
 
I had an intermittent fault on my driver's door window, it would only work when the door was closed and not when the door was open. At first I thought that it might have been some kind of security feature but I eventually traced it to intermittent wiring inside the rubber tube grommet between the door post and the door. I just spliced in two new wires.
Thinking about it afterwards, that point is the place of most mechanical stress which can break wires through excessive bending and flexing.
 
you can rule switches out by swapping the plugs on rear over,but most common cause seems to be the window module at the side of glove box in lh footwell
 
Cheers James

To be honest the first thing I did was swap the switches about which made no difference, and I've swapped the module which also made no difference. Whatever it is it seems to effect both rear windows equally, the either both work or both don't, it's a bit odd

Cheers

Towsey
 
Another place to check carefully is the isolation switch, the one that switches off the rear windows. It disconnects the ground to the window switches. To check it, just short out the connections at the back of the switch, that should them make the ground a permanent one.
 
Well...

When I changed the module I left it just hanging around for a few days and all was ok, I thought it cured it so, I put everything back together and the very next day they played up again, most annoying!

Do I need to get a module apart and do something inside it then???

Thanks

Towsey
 
Yes young man you do !
Think there's a thred on here some were ? All you have to do is prize the front out were your plugs go in ,then you can get the board out, look for dry joints & re solder ! simples,LOL
Steve
 
Cheers for that Steve, it sounds like a rite barrel of laughs ha. Il have a bash when I get chance

Thanks

Towsey
 
The hardest part is getting the plugs out of the control unit. Once you've done that prize the front off and pull the card out. I removed the glove box to give myself more room to help on that.

On mine there appeared to be only one joint which had gone so look carefully, re solder, slide it back in place (making sure the control card is sitting in the case properly), clip the front back on and plug it back in.

30 minutes and job done.
Do check the switches as well though as two of the four on mine were fairly manky and only worked in one direction, I stripped them done, cleaned them up and now it all works as it should.
 
Cheers nat

I've already had it out and put another one in which seems exactly the same, I explained back up there somewhere earlier^^^^^. So I have my original module out already so il try and have a look in that one and see wot I can see

Thanks

Towsey
 
Well it's gettin dark where I took the pic but I've had the module apart and it all looks like it's just been soldered today, I know a couple of joints look dark in the pic but in real life they are fine

Is this what you guys were meaning for me to look at?

Cheers

Towsey
 

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Towsey I can see three suspects & that's with out magnifying glass, The 1 below the hole in the board & the other 2 that are on the next track down ! resolder them & it will work !

Steve
 
Ah, are you lookin at the ones that look like they have cracks round them. Il look again in the morning in more detail but thanks for pointing them out

Towsey
 
Good man, cheers

But...wots the chances of exactly the same joints being funkered in the other module that's in at the moment?

Thanks

Towsey
 
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