Roof issues

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Gareth 161
Joined: Thu 08 Mar, 2012 23:41
Posts: 116

  Z3 roadster 3.0i
Location: Cornwall

Roof issues

Post by Gareth 161 » Thu 13 Jun, 2019 14:49

I am having trouble with my electric roof in that sometimes it takes many attempts to get it to work whilst other times it works first time. This is from either the opening or closing position. Have read the posting on how to replace micro switch which looks a possibility but is there any way of checking what is causing the problem before I start ripping things apart as presumably it could be the brake switch or roof switch?. I started to look at the roof operating switch in the console but looks a bit more complicated than a simple push button switch with contacts.
Also my rear plastic window has gone opaque and although there are various write ups on polishing out scratches,is there any way to get the window clear again which actually works other than replacing the whole hood as unfortunately my window is not the zipped in variety.
Thanks for any help
Gareth
2001 3.0 Z3, 2008 Subaru Forester Xten

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Adam
Joined: Sat 21 Jul, 2007 19:43
Posts: 335

  Z3 roadster 2.8
Location: Newport
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Re: Roof issues

Post by Adam » Thu 13 Jun, 2019 15:35

I cant assist on the roof issues myself but I can for the rear screen.

I used some Autoglym Super Resin Polish and either some good old fashion elbow grease or a machine polisher to clean the rear window. It might take a few treatments inside and out to clear the screen up. You will be quite surprised how well it will come up but obviously it will never be like new (depends on the current condition of the screen)

The same applies for cleaning up your headlight lenses.

Gareth 161
Joined: Thu 08 Mar, 2012 23:41
Posts: 116

  Z3 roadster 3.0i
Location: Cornwall

Re: Roof issues

Post by Gareth 161 » Thu 13 Jun, 2019 16:10

Thanks Adam will get some and try, also will try on headlights as one has gone a bit cloudy.
Had a quote for new roof of just over £700 and not much less for taking roof off to put in new window as stitched in and not zipped.
As roof is getting a bit tired, if I can’t clean it up enough to see through then could be an early Xmas present to myself!
With the roof operation, it’s a pain as either you are in the blazing sun repeatedly trying to get it down or in the pouring rain trying to put it up. Either way one looks a bit of a t . . t and having to resort to manual operation!
2001 3.0 Z3, 2008 Subaru Forester Xten

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Gazza
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Joined: Tue 04 Oct, 2005 21:58
Posts: 9400

  M roadster S54
Location: Romford Essex

Re: Roof issues

Post by Gazza » Thu 13 Jun, 2019 16:39

Is the pump working ?

Have you checked the ‘T’ screw on the pump ?
Gazza

"Understeer is when you hit the wall with the front of the car, oversteer is when you hit the wall with the rear of the car. Horsepower is how fast you hit the wall and torque is how far you take the wall with you"

Z3 S54 M roadster Image, BMW Z1, BMW M3 CSL, Z4M Coupe
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Gareth 161
Joined: Thu 08 Mar, 2012 23:41
Posts: 116

  Z3 roadster 3.0i
Location: Cornwall

Re: Roof issues

Post by Gareth 161 » Thu 13 Jun, 2019 17:24

I think pump is ok and T handle in right position I assume as if I turn it back, then I can operate roof manually but it just seems strange that if I keep trying by pushing the various buttons and roof back it will eventually work electrically although will sometimes stop halfway which is why I thought it must be linked to the electrical side. Is there any way of telling if there is enough fluid in the pump in case that makes any difference?
Thanks Gareth
2001 3.0 Z3, 2008 Subaru Forester Xten

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colb
Joined: Sat 05 May, 2012 23:46
Posts: 654

  Z3 roadster 1.8 TU
Location: Newport South Wales UK

Re: Roof issues

Post by colb » Thu 13 Jun, 2019 17:25

You would get a cheaper replacement hood at Jack Smith trimmers in Swansea, worth a couple of days away from Cornwall and he completes the job in a day whilst you sightsee Swansea. Quite a lot of Z owners have used his services and all have glowing reports on his work. Well worth phoning him for a quote, you also get a choice of colours. Windows are sewn in not zipped. He has a facebook page search for Jack R. Smith Motor Trimmers on facebook. Best phone as he dosn't monitor his pages too often.
01792 461022
158 St Helen's Avenue (66.70 km)
SA1 4NQ Swansea, United Kingdom
Colb
1999 BMW 1.8 Z3
1998 Honda Deauville NT650V

Gareth 161
Joined: Thu 08 Mar, 2012 23:41
Posts: 116

  Z3 roadster 3.0i
Location: Cornwall

Re: Roof issues

Post by Gareth 161 » Thu 13 Jun, 2019 17:29

Thinking about it, I did move the pump when I changed the aerial grommet so possibly disturbed something although can’t remember if the problem started after that or not?
2001 3.0 Z3, 2008 Subaru Forester Xten

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Robert T
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Joined: Mon 12 Jun, 2006 11:35
Posts: 10068

  Z3 roadster 1.9
Location: Cheshire

Re: Roof issues

Post by Robert T » Thu 13 Jun, 2019 22:14

You can eliminate the microswitch by disconnecting it and its loom close to where the base of the roof hinges on the left-hand side of the car, and then shorting the same two pins together in the three-way connector on the body. The other pin is for the heated rear-window of the hardtop.

The roof up/down switch and brake light switch have also been known to fail.

Cheers R.

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Arctic Silver '99 Z3 1.9 & Black '59 Frogeye 1275cc
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Gareth 161
Joined: Thu 08 Mar, 2012 23:41
Posts: 116

  Z3 roadster 3.0i
Location: Cornwall

Re: Roof issues

Post by Gareth 161 » Thu 13 Jun, 2019 23:32

Thanks Robert and that might a good first move to eliminate one possible cause although I do hear it click when lifting roof back the first few inches so assumed it was ok. However as it seems worse when been sitting in full sun on that side, possibly it could be the culprit and presumably does not cause any issues if disconnected.
I did take the roof switch out and check for any corrosion but it is a lot more complex than the switches on my old 325i so gave up and eventually managed to refit it into console.
Will see if I can get to the brake pedal switch in case there is any obvious signs of a problem there.
Gareth
2001 3.0 Z3, 2008 Subaru Forester Xten

Gareth 161
Joined: Thu 08 Mar, 2012 23:41
Posts: 116

  Z3 roadster 3.0i
Location: Cornwall

Re: Roof issues

Post by Gareth 161 » Fri 14 Jun, 2019 11:57

Hi Robert
Have traced the wire from the micro switch down to the hinge but do you know how I access the plug as not sure which piece of trim to remove and don’t want to start taking out the wrong bits!
Thanks Gareth
2001 3.0 Z3, 2008 Subaru Forester Xten

Gareth 161
Joined: Thu 08 Mar, 2012 23:41
Posts: 116

  Z3 roadster 3.0i
Location: Cornwall

Re: Roof issues

Post by Gareth 161 » Fri 14 Jun, 2019 13:31

I suppose another option is to join the wires together where they join the micro switch as that’s fairly easy to get to?
2001 3.0 Z3, 2008 Subaru Forester Xten

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Robert T
Site Admin
Joined: Mon 12 Jun, 2006 11:35
Posts: 10068

  Z3 roadster 1.9
Location: Cheshire

Re: Roof issues

Post by Robert T » Fri 14 Jun, 2019 14:39

There are some pictures in this thread of where the connector is on my car - they were taken with the hardtop installed - with the hardtop off and roof down, it is much easier to get at. The trim piece is part of the hardtop fitting kit, so you likely won't have this.

Also, take a look in the Z3 Knowledgebase under "Hardtop and Softtop" - there are articles on replacing the microswitch itself, replacing the brake light switch and on repairing the microswitch loom.

You could short the pins on the microswitch, or simply remove it and depress it firmly to rule that out. The wiring loom for it is in a sheath, so it not easy to see broken wires. And you can test the brake light switch by checking the brake lights - if they flicker, you have a dodgy switch!

Cheers R.
Arctic Silver '99 Z3 1.9 & Black '59 Frogeye 1275cc
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