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Old 16-12-2016   #16
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Re: 500C - high level centre brake light

Quote Originally Posted by carnovice13 View Post
Hello all

New to the forum and hoping to get some advice.......
I have a Fiat 500 convertible and one of the brake lights has stopped working. Also having issues with the roof were I have to hold the button down now to close or open it fully, a click simply won't do it anymore. there is also a front running light out.

My local garage has had a look and says it needs a new computer...... I know very little about cars but I am not sure how a single brake light stops working due to a computer fault. There is nothing I or the garage can find physically wrong with the light.
Also previously the same garage had said the unit for the front running light was corroded but now think a new computer will fix that as well ?

My question is is the above situation even possible and am I being ripped off ?

Any advice is greatly appreciated as they aren't asking for peanuts

Is anyone able to advise of a decent reliable garage in the Swindon area ?

Also helps when I put this in the right place
Check the hatch wiring before doing anything else. If the wiring is damaged (and it's an extremely common problem), then diagnostics can't be trusted.
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Last edited by jrkitching; 16-12-2016 at 19:07.
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Old 16-12-2016   #17
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Re: 500C - high level centre brake light

Quote Originally Posted by carnovice13 View Post
Hello all

New to the forum and hoping to get some advice.......
I have a Fiat 500 convertible and one of the brake lights has stopped working. Also having issues with the roof were I have to hold the button down now to close or open it fully, a click simply won't do it anymore. there is also a front running light out.

My local garage has had a look and says it needs a new computer...... I know very little about cars but I am not sure how a single brake light stops working due to a computer fault. There is nothing I or the garage can find physically wrong with the light.
Also previously the same garage had said the unit for the front running light was corroded but now think a new computer will fix that as well ?

My question is is the above situation even possible and am I being ripped off ?

Any advice is greatly appreciated as they aren't asking for peanuts

Is anyone able to advise of a decent reliable garage in the Swindon area ?

Also helps when I put this in the right place
The first thing to do with the recalcitrant roof is to run an initialization procedure. I posted the page from the 500C supplementary manual a couple of years ago but basically it's this;

1. With the engine running, make sure the roof is fully closed.
2. Hold down the 'Open' button until the roof is fully open, i.e. right to the boot, and continue to hold the button down for another two seconds before you let go.
3. Hold the 'Close' button down until the roof is fully closed and again hold the button for another two seconds before releasing it.

The roof, unless there really is a problem, will then automatically go through a complete opening and closing sequence and should function normally thereafter.

The 'blown' LED in the brake light has probably succumbed to condensation. The only cure is a new brake light which is fitted from inside the spoiler. Forum member BigKev outlined the procedure a couple of years ago and I'll try to find the post for you. Basically it involved pulling the trim above the window aside and undoing about four screws to remove the spoiler.

Later;

Quote from BigKev;
“Well, actually I had a go at this last year (this is an old thread). The rear portion of head lining is unclipped, then four screws are removed to release the spoiler, then the whole LED unit can be replaced. On assembly, apply more sealant to the four screw holes to combat leaks, replace screws and headlining. Fiddly working in the back of the car (it is for me as I am a huge fella!) but not difficult for a competent DIY type.
The new LED unit is hellishly expensive though, at over £100!!!”


And here’s the link to the thread with the 500C manual page;
https://www.fiatforum.com/500/437720...ml#post4184024


Good luck with it.
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Last edited by Piccolo Nero e Bella; 16-12-2016 at 22:25.
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Old 09-01-2017   #18
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Re: 500C - high level centre brake light

I wonder how they got on...?
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Old 19-02-2017   #19
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Re: 500C - high level centre brake light

I just had to remove my third 500c brake light due a some of the LED's not working. I've had the car from new and the Brake light has lasted 5yrs ...not good really .

Ordered a replacement from today , Fiat Part number : 77365246 @ £155 !!!

As they always seem to fill up with water I thought I would take the old light apart to see where it needs sealing to stop the new one leaking and becoming faulting again at this silly price!
The issue seems to be around the red lens and its mount to the lens backing , so once the new one arrives I will be sealing around the light to try and make it last longer then 5yrs !

To gain access to the light is quite easy once the roof lining is removed and the previously notes written on this are quite easy to follow but here are a few pictures of the lining and the lens apart showing the issue with the SMD ( surface mounted device) Led broken off the circuit board , I suspect due to the damp of the water getting into the lens .
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Last edited by iangray100; 19-02-2017 at 18:14.
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Old 19-02-2017   #20
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Re: 500C - high level centre brake light

Here are the Fiat notes to gain access to the 500c third brake light :
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Old 27-02-2019   #21
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Re: 500C - high level centre brake light

Did you find a solution
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Old 04-03-2019   #22
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Re: 500C - high level centre brake light

Thanks for posting those pictures. If the LEDs are not broken, it might actually be possible to solder them back to the board. A bit fiddly but not impossible and at that price certainly worth a try.
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Old 06-04-2020   #23
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Thumbs down Re: 500C - high level centre brake light

These posts were really helpful, thank you. Iíve removed my spoiler and taken the light out but how on earth do you get the LEDs out of the housing to resolver them (if thatís what the problem is)it looks like itís sealed into the plastic housing permanently.
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Old 06-04-2020   #24
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Re: 500C - high level centre brake light

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Old 06-04-2020   #25
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Quote Originally Posted by Lummers View Post
These posts were really helpful, thank you. Iíve removed my spoiler and taken the light out but how on earth do you get the LEDs out of the housing to resolver them (if thatís what the problem is)it looks like itís sealed into the plastic housing permanently.
More pics as you do this please
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Old 06-04-2020   #26
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Re: 500C - high level centre brake light

Quote Originally Posted by Lummers View Post
These posts were really helpful, thank you. I’ve removed my spoiler and taken the light out but how on earth do you get the LEDs out of the housing to resolver them (if that’s what the problem is)it looks like it’s sealed into the plastic housing permanently.
If you look at the photo in the post at the top of this page it appears you have to break out the strip at the back of the light.

As this failure is almost certainly due to moisture ingress, resealing it thoroughly when finished is paramount.
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Last edited by Piccolo Nero e Bella; 06-04-2020 at 13:51.
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Old 06-04-2020   #27
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Re: 500C - high level centre brake light

Putting it into the oven might help, often these modules are glued together with something heat sensitive.
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Old 05-06-2020   #28
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Re: 500C - high level centre brake light

Fixed it for £20.70 with a new LED sealed strip from Car Builder Solutions and some Sikaflex mastic to seal it and hold it in place. Not quite the same size as original but saved £140 so Iím not worried!
Part number LEDST14
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