Electric roof failure

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swabyk
Joined: Mon 18 Jul, 2016 18:38
Posts: 83

  Z3 roadster 1.9

Electric roof failure

Post by swabyk » Sun 11 Sep, 2016 16:37

Hi Guys,
When I bought my Z3, 3 months back, the electric roof failed when the seller tried to put it down, so he did it manually using the override and then after that it worked, we tried it 50 times before buying and it worked every single time after. To be honest I knew it would probably fail at some point in the future as it was obviously on its way out when it didn't work the first time we tried it but i was after a little project car so wasn't put off.

That failure then happened again today for the first time since and tons of use in between! Now it wont go up or down on electrics, only using the manual override. So my question, before I buy a replacement electric pump off flebay, is there anything else worth trying first? Anything simple that might not be pump related? Im just presuming the pump has failed, is this then most common fault though?

Thanks guys
Ken

Bananasport
Joined: Tue 19 Nov, 2013 20:30
Posts: 49

  Z3 roadster 3.0i
Location: Taverham Norfolk

Re: Electric roof failure

Post by Bananasport » Sun 11 Sep, 2016 16:58

I had the same thing happen and the problem was a micro switch on one of the joints of the roof frame, cleaned and spray cured it. hope yours is as easy.

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Brian H
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Joined: Tue 16 Dec, 2008 19:55
Posts: 2502

  Z3 roadster 3.0i

Re: Electric roof failure

Post by Brian H » Sun 11 Sep, 2016 17:03

Never heard of a roof motor failing, there is a micro switch in the roof on the passenger side and a wire that runs down the frame, check this wire as they can become brittle and break, another thing to look at is your brake switch, do your brake lights work?

swabyk
Joined: Mon 18 Jul, 2016 18:38
Posts: 83

  Z3 roadster 1.9

Re: Electric roof failure

Post by swabyk » Sun 11 Sep, 2016 17:18

Hi guys, thanks for quick responses. Yes brake lights all work.

Is there anywhere id find a diagram of where the micro-switch is or photos do you know, or is it obvious when you look?

swabyk
Joined: Mon 18 Jul, 2016 18:38
Posts: 83

  Z3 roadster 1.9

Re: Electric roof failure

Post by swabyk » Sun 11 Sep, 2016 17:19

Actually, dont worry, just googled it. Will perhaps try and fix the switch or buy a replacement switch first then, thanks

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Brian H
zroadster sponsor
Joined: Tue 16 Dec, 2008 19:55
Posts: 2502

  Z3 roadster 3.0i

Re: Electric roof failure

Post by Brian H » Sun 11 Sep, 2016 17:26

More likely to be the wire than the micro switch, just trace the loom down the roof frame.

swabyk
Joined: Mon 18 Jul, 2016 18:38
Posts: 83

  Z3 roadster 1.9

Re: Electric roof failure

Post by swabyk » Sun 11 Sep, 2016 17:52

Sorry, bit of a car novice. When you say its more likely to be the wire, how do you test that out?

Also, anyone know where you can buy the microswitch or the part number?

swabyk
Joined: Mon 18 Jul, 2016 18:38
Posts: 83

  Z3 roadster 1.9

Re: Electric roof failure

Post by swabyk » Sun 11 Sep, 2016 18:05

Since found that too, part number; 54348407250

Only UK price I can find is £70!!! :shock: :shock: :shock:

alec.m
Joined: Tue 05 Oct, 2010 20:01
Posts: 533

  Z3 roadster 2.8
Location: Lymington

Re: Electric roof failure

Post by alec.m » Sun 11 Sep, 2016 18:32

In the knowledge base, all you need to know to repair a microswitch.

viewtopic.php?f=18&t=34454

Hope this helps

swabyk
Joined: Mon 18 Jul, 2016 18:38
Posts: 83

  Z3 roadster 1.9

Re: Electric roof failure

Post by swabyk » Sun 11 Sep, 2016 19:49

Thanks, just trying to work out how to ensure it is the switch before I start taking it all apart, worried about doing all that work and it being something different!!

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Robert T
Site Admin
Joined: Mon 12 Jun, 2006 11:35
Posts: 9984

  Z3 roadster 1.9
Location: Cheshire

Re: Electric roof failure

Post by Robert T » Sun 11 Sep, 2016 20:29

You can test by bypassing the switch and cable completely at the connector by the lefthand (UK passenger) seatbelt turret. If that works, then you can start to narrow it down to either the microswitch or the cable.

Another possibility is the roof up-down switch itself on the dash. I have heard at least one occurrence of this over the years I've been on here.

Cheers R.

Sent from my SM-G920F using Tapatalk
Arctic Silver '99 Z3 1.9 & Black '59 Frogeye 1275cc
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swabyk
Joined: Mon 18 Jul, 2016 18:38
Posts: 83

  Z3 roadster 1.9

Re: Electric roof failure

Post by swabyk » Sun 11 Sep, 2016 21:54

Ah ok, didnt know there was another terminal as such, will take a look. Appreciate the help, good man!

swabyk
Joined: Mon 18 Jul, 2016 18:38
Posts: 83

  Z3 roadster 1.9

Re: Electric roof failure

Post by swabyk » Wed 21 Sep, 2016 16:13

Robert T wrote:You can test by bypassing the switch and cable completely at the connector by the lefthand (UK passenger) seatbelt turret. If that works, then you can start to narrow it down to either the microswitch or the cable.

Another possibility is the roof up-down switch itself on the dash. I have heard at least one occurrence of this over the years I've been on here.

Cheers R.

Sent from my SM-G920F using Tapatalk

Have looked and couldnt find the connector by the seatbelt turret as described above, can anyone poinpoint this for me, is it under carpet, under seat, behind trim etc? any pics? thank you - Need to find why my roof isnt working! :(

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BladeRunner919
Joined: Fri 17 Feb, 2012 20:18
Posts: 2220

  Z3 roadster 1.9

Re: Electric roof failure

Post by BladeRunner919 » Wed 21 Sep, 2016 16:55

Trace where the wire from the microswitch goes into the side trim, and it's just in there.

swabyk
Joined: Mon 18 Jul, 2016 18:38
Posts: 83

  Z3 roadster 1.9

Re: Electric roof failure

Post by swabyk » Wed 21 Sep, 2016 17:16

OK, followed it into the trim so its a 'trim off' jobbie?

swabyk
Joined: Mon 18 Jul, 2016 18:38
Posts: 83

  Z3 roadster 1.9

Re: Electric roof failure

Post by swabyk » Wed 21 Sep, 2016 17:21

Just found these pictures that show the braided lead and the white switch/connector.

Apologies if im being dumb, but how does that help me know what is or isnt working, isnt it just a connector? Rather than a switch as such???

http://www.bimmerforums.com/forum/showt ... cro-Switch

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BladeRunner919
Joined: Fri 17 Feb, 2012 20:18
Posts: 2220

  Z3 roadster 1.9

Re: Electric roof failure

Post by BladeRunner919 » Wed 21 Sep, 2016 17:30

You need to unplug the switch and then bridge the terminals to emulate the switch being in the closed (allowing the roof mechanism to operate) position. If the roof then works, you have a dud switch. If not, then the trouble-shooting moves on. Do bear in mind that with the terminals bridged you have to make sure you have lifted the front of the roof up properly because if you don't, and the mechanism runs, you can damage the roof frame.

BILLZ3
Joined: Fri 15 Jan, 2016 18:26
Posts: 9

  Z3 roadster 1.9

Re: Electric roof failure

Post by BILLZ3 » Wed 21 Sep, 2016 18:06

In total agreement with Blade runner , his suggestions is how I traced my faulty roof to a failed micro switch,
I just disconnected the two wires from micro switch taped them together tested roof and hey presto worked fine . Used the fix on the link to replace switch :)

BILLZ3
Joined: Fri 15 Jan, 2016 18:26
Posts: 9

  Z3 roadster 1.9

Re: Electric roof failure

Post by BILLZ3 » Wed 21 Sep, 2016 18:15

If you go into the knowledge base , click on z3 , stroll down to soft top and hard top there is an excellent thread on micro switch fix

swabyk
Joined: Mon 18 Jul, 2016 18:38
Posts: 83

  Z3 roadster 1.9

Re: Electric roof failure

Post by swabyk » Wed 21 Sep, 2016 18:15

Cheers guys, much appreciated.

Dont suppose you know how to remove this bit of trim, have tried and whilst access is tight there seems no obvious way to remove it! :head: :head: :head:

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