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Author Topic: Signum rear light fault part 2.  (Read 153 times)

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Field Marshal Dr. Opti

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Signum rear light fault part 2.
« on: 14 November 2017, 12:50:54 »

I've removed the rear light unit and found this. With the ignition on I have checked and there is no power getting to the connection 3rd from the left.

All bulbs look intact. Plastic connector looks as though it has melted.

Looked in the handbook but can't find fuse for rear lights.






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Doctor Gollum

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Re: Signum rear light fault part 2.
« Reply #1 on: 14 November 2017, 13:02:53 »

Fuses on that are all nearside...

Behind left dash end panel, and in left boot cubby :y

The Vectra C has a system whereby if one of the brake lights fails, it ups the current to a side light bulb in order to maintain a brake light on each side... Possible that this has caused the plug connection to melt due to moisture ingress :-\

Might be fog light position on both sides rather than side lights, but either way, check the bulbs for position and wattage along with contact condition ;)
« Last Edit: 14 November 2017, 13:15:32 by Doctor Gollum »
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Doctor Gollum

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Re: Signum rear light fault part 2.
« Reply #2 on: 14 November 2017, 13:16:47 »

What colour is the wire at the melted contact?
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Field Marshal Dr. Opti

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Re: Signum rear light fault part 2.
« Reply #3 on: 14 November 2017, 13:21:32 »

What colour is the wire at the melted contact?

Brown..
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Field Marshal Dr. Opti

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Re: Signum rear light fault part 2.
« Reply #4 on: 14 November 2017, 13:34:43 »

Fuses on that are all nearside...

Behind left dash end panel, and in left boot cubby :y

The Vectra C has a system whereby if one of the brake lights fails, it ups the current to a side light bulb in order to maintain a brake light on each side... Possible that this has caused the plug connection to melt due to moisture ingress :-\

Might be fog light position on both sides rather than side lights, but either way, check the bulbs for position and wattage along with contact condition ;)

Brake light working rear light is not.I was surprised to find the rear stop/ tail light  work from a single filament
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Doctor Gollum

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Re: Signum rear light fault part 2.
« Reply #5 on: 14 November 2017, 13:36:22 »

What colour is the wire at the melted contact?

Brown..
That's the ground/earth/negative*

Check all the bulbs for voltage/wattage and replace any suspicious ones...

*delete for preference  ::)
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henryd

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Re: Signum rear light fault part 2.
« Reply #6 on: 14 November 2017, 14:05:34 »

Fuses on that are all nearside...

Behind left dash end panel, and in left boot cubby :y

The Vectra C has a system whereby if one of the brake lights fails, it ups the current to a side light bulb in order to maintain a brake light on each side... Possible that this has caused the plug connection to melt due to moisture ingress :-\

Might be fog light position on both sides rather than side lights, but either way, check the bulbs for position and wattage along with contact condition ;)

Brake light working rear light is not.I was surprised to find the rear stop/ tail light  work from a single filament

Canbus varies the voltage to suit :y
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Fuse 19

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Re: Signum rear light fault part 2.
« Reply #7 on: 14 November 2017, 14:36:16 »

Well not actually canbus, the Rear Electrical Centre, when it receives a command for tail lights limits the current through the bulb so it illuminates at a lower wattage, when a brake command is received it allows full current.

In basic terms, the controller has a dimmer function  :y
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Field Marshal Dr. Opti

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Re: Signum rear light fault part 2.
« Reply #8 on: 14 November 2017, 14:51:57 »

Shame. I have a shit load of the old style stop/tail twin filament bulbs knocking around. ::)

The main problem appears to be the black plastic multi-connector. The slightest movement and I lose the rear lights.

However, as a  highly qualified engineer ::) I have shoved some bacofoil into the said connector for a tighter fit.

Working as it should (for now) :)

 
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Sir Tigger QC

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Re: Signum rear light fault part 2.
« Reply #9 on: 14 November 2017, 15:10:16 »

You can't beat a good old fashioned bodge!  :y
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Field Marshal Dr. Opti

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Re: Signum rear light fault part 2.
« Reply #10 on: 14 November 2017, 15:36:33 »

You can't beat a good old fashioned bodge!  :y

During the war the British people had an attitude of 'make do and mend' :)
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Fuse 19

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Re: Signum rear light fault part 2.
« Reply #11 on: 14 November 2017, 15:37:13 »

You can't beat a good old fashioned bodge!  :y

So named after the person who designed the ill fated Tay Bridge
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Sir Tigger QC

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Re: Signum rear light fault part 2.
« Reply #12 on: 14 November 2017, 17:31:22 »

You can't beat a good old fashioned bodge!  :y

During the war the British people had an attitude of 'make do and mend' :)

As a mere youngster I'll have to take your word for that M'lud.  :)
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Nick W

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Re: Signum rear light fault part 2.
« Reply #13 on: 14 November 2017, 17:52:24 »

You can't beat a good old fashioned bodge!  :y

So named after the person who designed the ill fated Tay Bridge


Bodgers were an important part of the furniture trade around High-Wycombe. They turned things like chair legs, spindles etc by hand on simple lathes. Paid by piecework.
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Lincs Robert

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Re: Signum rear light fault part 2.
« Reply #14 on: 14 November 2017, 18:00:01 »

You can't beat a good old fashioned bodge!  :y

So named after the person who designed the ill fated Tay Bridge


Bodgers were an important part of the furniture trade around High-Wycombe. They turned things like chair legs, spindles etc by hand on simple lathes. Paid by piecework.

Didnít the have pet Badgers, & ate mash?  ;D

Iíll leave now .........
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