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PostPosted: Thu May 24, 2018 2:06 pm 
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Light Pressure Turbo
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Joined: Tue Feb 28, 2017 2:59 pm
Posts: 557
Location: Herefordshire
Car Model: 900i '87 96V4 '72 E30 Alvis
I'm trying to install a high level brake light in my '87 c900i. I have the light unit and fixing bracket, but on removing the tailgate trim it is not obvious how this should be attached
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I wonder whether there is a clamp of some sort missing?

Then there is the wiring. I spoke to someone recently who thought that all c900 tailgates were wired for a high level brake light, so I fished around inside the metalwork, and found this down the right hand side
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The feed wires to the existing brake lights are red, but the ones to this 2-way connector are violet (VL) and white with a brown stripe (VT/BR), which are for the central locking- that isn't fitted on this car.
Do I have to feed a new cable through the tailgate and down the rear pillar?


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PostPosted: Thu May 24, 2018 2:44 pm 
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Joined: Mon Aug 22, 2016 11:23 am
Posts: 175
Location: Leicestershire
Car Model: 1992 3dr 900i
One clamp required:


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PostPosted: Thu May 24, 2018 8:41 pm 
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Light Pressure Turbo
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Joined: Tue Feb 28, 2017 2:59 pm
Posts: 557
Location: Herefordshire
Car Model: 900i '87 96V4 '72 E30 Alvis
Thanks Doc
...and three captive nuts.

Wonder if I can connect it up using blue tooth :geek:


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PostPosted: Thu May 24, 2018 9:47 pm 
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Joined: Tue Oct 30, 2007 9:26 pm
Posts: 5947
Location: North Essex
Car Model: 900Ruby,vert, 9000, 99, Sonett
Brown/White and Violet wires are central locking. Brake light wires are red and black.

(High level brake light is part 109.)

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PostPosted: Fri May 25, 2018 10:07 am 
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Light Pressure Turbo
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Joined: Tue Feb 28, 2017 2:59 pm
Posts: 557
Location: Herefordshire
Car Model: 900i '87 96V4 '72 E30 Alvis
The problem I have Ursa, is that I can't find a red wire in my tailgate. This means I would have to feed a wire up one side of the tailgate, through one grommet, a short length of tube, a second grommet, under the headlining and down the rear pillar.
The chances of my doing this without damaging anything, and getting all the trim back in tidy, without chucking my toys out of the pram are very slim indeed...


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PostPosted: Fri May 25, 2018 12:58 pm 
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Joined: Tue Oct 30, 2007 9:26 pm
Posts: 5947
Location: North Essex
Car Model: 900Ruby,vert, 9000, 99, Sonett
I'm not sure of the date when Saab started fitting a high level brake light. The circuit diagram is from the 1989 model year. If your car was assembled before the light was fitted there will not be any wiring.

As you don't have/use the central locking actuator in the tailgate lock, you could use the central locking wires for the brake light. You have already found the connector in the tailgate. There is also one in the rear nearside wing.

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I came into this world with nothing & I've still got most of it left.


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PostPosted: Fri May 25, 2018 9:10 pm 
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Light Pressure Turbo
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Joined: Tue Feb 28, 2017 2:59 pm
Posts: 557
Location: Herefordshire
Car Model: 900i '87 96V4 '72 E30 Alvis
As there are holes stamped in the tailgate to accept captive nuts for the clamp, I would have expected the loom to include the relevant wiring, however the schematic I have for an '87 does not show a high level brake light - or if it does I can't find it.
It looks like re-purposing the central locking circuit might be Plan B


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