Window only moves 2cm pre-press

International forum for all Z1 enthusiasts

Moderator: Gazza

Post Reply
Motorhead
Joined: Mon 22 Jul, 2013 09:51
Posts: 23

  Z1 roadster

Window only moves 2cm pre-press

Post by Motorhead » Mon 28 Apr, 2014 14:13

The driver’s side window will only go up or down in 2cm increments: I can get the window to go up and down but I have to repeatedly press the window switch.

The window moves smoothly when the door is lowered and raised, so its not a mechanical problem. I’m thinking it’s a senor. Anyone had a similar problem and can suggest a fix?

Thanks, Richard
Z1 1989 # 465 of 8000
M635CSi 1989 # 480 of 524
3.0CSL 1972 # 385 of 500
Lamborghini Silhouette 1977 #26 of 52

User avatar
Jet
Joined: Fri 14 Nov, 2003 16:24
Posts: 2263

  blank
Contact:

Re: Window only moves 2cm pre-press

Post by Jet » Mon 28 Apr, 2014 19:17

The switch sunk into the surround or the surround warped, broken etc etc. Remove the switch, test, if it works, its the surround. If it doesn't, check the switch for missing springs, broken bent bits of plastic.

felix
Joined: Sat 02 Jul, 2005 17:25
Posts: 529

  Z1 roadster

Re: Window only moves 2cm pre-press

Post by felix » Mon 28 Apr, 2014 20:21

Yup, what he said. Try swapping switches left and right. From memory the clips on the surround that hold the switch in place are delicate and may snap off. The good news is that the surround is still available (or at least it was a few years ago - ask me why I know?!).

Z1ChrisM
Joined: Thu 20 Mar, 2008 18:47
Posts: 18

  Z1 roadster
Location: Preston

Re: Window only moves 2cm pre-press

Post by Z1ChrisM » Wed 30 Apr, 2014 19:21

Hi,
Before you start replacing switches I think your first thought about sensors is correct.
I have had this problem once & could not get a fix.
Then I had to replace the battery and everything went back to normal. Since then I have been told that disconnecting the battery can trigger a 'reset' of the window electrics.
Worth trying before you do anything else.
Hope it works.
ChrisM.

felix
Joined: Sat 02 Jul, 2005 17:25
Posts: 529

  Z1 roadster

Re: Window only moves 2cm pre-press

Post by felix » Wed 30 Apr, 2014 19:57

The control units for the doors/windows are clipped to the inside of the battery compartment cover. If a switch swap and battery disconnect doesn't change anything try swapping control units to see if the problem moves.

I had some issue with my driver's door window (the details of which I can no longer recall) and I ended up buying a new window motor and that solved it. Was pricey a few years ago and is likely to be more so now.

Motorhead
Joined: Mon 22 Jul, 2013 09:51
Posts: 23

  Z1 roadster

Re: Window only moves 2cm pre-press

Post by Motorhead » Thu 01 May, 2014 14:38

Thanks for the advice. I should have said I've already swapped over the window switches and its always the drivers side that does't work while the passenger side does, no mater which switch is used - hence not a switch problem.

I'll give the battery reset a go.

Thanks.
Z1 1989 # 465 of 8000
M635CSi 1989 # 480 of 524
3.0CSL 1972 # 385 of 500
Lamborghini Silhouette 1977 #26 of 52

User avatar
Jet
Joined: Fri 14 Nov, 2003 16:24
Posts: 2263

  blank
Contact:

Re: Window only moves 2cm pre-press

Post by Jet » Thu 01 May, 2014 16:13

To reset the controllers, you remove fuses no25/26.

t-tony
Joined: Sun 21 Feb, 2010 23:17
Posts: 352

  Z3 roadster 2.0
Location: torksey lock

Re: Window only moves 2cm pre-press

Post by t-tony » Fri 02 May, 2014 21:09

When you get your window lift/lower problem sorted give the window channel rubbers a coat of silicon spray to lubricate them. You will be amazed how much easier and quieter they go up and down. These often go Unmaintained.
"Knowledge and experience are not always the same"

Motorhead
Joined: Mon 22 Jul, 2013 09:51
Posts: 23

  Z1 roadster

Re: Window only moves 2cm pre-press

Post by Motorhead » Thu 08 May, 2014 10:30

I tried the battery removal reset but that didn’t work. I couldn’t change over the controllers as the dinky connection mechanism defeated me, surely it’s not a case of just pulling harder (I’ve broken too many things doing that). Is there an easy way of separating them?

I’ll give the fuses a go next.
Z1 1989 # 465 of 8000
M635CSi 1989 # 480 of 524
3.0CSL 1972 # 385 of 500
Lamborghini Silhouette 1977 #26 of 52

User avatar
Jet
Joined: Fri 14 Nov, 2003 16:24
Posts: 2263

  blank
Contact:

Re: Window only moves 2cm pre-press

Post by Jet » Thu 08 May, 2014 15:03

Motorhead wrote:I tried the battery removal reset but that didn’t work. I couldn’t change over the controllers as the dinky connection mechanism defeated me, surely it’s not a case of just pulling harder (I’ve broken too many things doing that). Is there an easy way of separating them?

I’ll give the fuses a go next.
Fuses are simply an easier solution to the awkward battery, next up is controllers. Remove fuse, disconnect controller, inspect contact points, look for wear, dryness etc. Clean, connect then insert fuse.

If that does not work, then try swapping them.

User avatar
Jet
Joined: Fri 14 Nov, 2003 16:24
Posts: 2263

  blank
Contact:

Re: Window only moves 2cm pre-press

Post by Jet » Fri 09 May, 2014 09:46

A little instruction on how to remove....

http://bmwz1.co.uk/ziki/doku.php?id=doors&#control_unit

Cabrioot
Joined: Wed 23 Oct, 2013 22:31
Posts: 74

  Z1 roadster

Re: Window only moves 2cm pre-press

Post by Cabrioot » Fri 09 May, 2014 10:07

Thanks for this information .
I follow this conversation with intrest. :)

Post Reply

Who is online

Users browsing this forum: No registered users and 3 guests