Earthing Rear Lights

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Mr Bridger
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Earthing Rear Lights

Post by Mr Bridger » Wed Nov 01, 2017 11:48 am

I’ve suffered from the usual Scimitar rear light maladies since owning my car which range from not working at all, through working but dimly as well as the incorrect light flashing with the indicators. At the moment I’ve got an indicator which doesn’t flash and a tail light that does, coupled with the dash indicator repeater lighting with the reverse lights. :roll:

Normally a waggle of the bulb holders cures things for a while, but I’m getting fed up with the will they won’t they work aspect. I have read on this forum about attaching earth wires to all the bulb holders rather than relying on contact between the holder and light housing to make a decent earth. Where is the best place to attached these individual wires to the bulb holder? Is it best to solder them?


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Post by willholderogri » Wed Nov 01, 2017 12:06 pm

I did it some time ago soldered wires is preferable (I've moved on to led modules now though )


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Post by Mr Bridger » Wed Nov 01, 2017 12:39 pm

Thanks Will, which bit of the holder did you solder the wires to?


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Post by willholderogri » Fri Nov 03, 2017 7:39 am

the actual strip down the inside of the holder I took it apart as I recall and resembled with the wire sticking out of the side. The problem I found with the holders is corrosion between the inside side plate and the retaining spring collar you could of course dismantle this clean and reassemble but it will corrode again later .


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Earthing Rear Lights

Post by philhoward » Fri Nov 03, 2017 8:02 am

The holder has a copper strip (as Will says) that contacts the bulb itself - this is where you should ideally connect to. Will is again spot on - the system relies on this copper strip then contacting the steel "clip" that holds the holder into the alloy housing to make the earth connection. If you know anything about dissimilar metals, then you can see the issues with this earth path!

There used to be a different version of the same bulb holder (used on the Doolomite I think) which came with a separate earth connection for each bulb; stocks of these have now dried up from the usual Triumph suppliers but they were the ones to use and add a new earth connection for each bulb. This is where Mark (gtcse8) says he's got 50 in stock... ;)


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Post by AnotherTim » Fri Nov 03, 2017 9:49 am

I have different lights now but I had the same sort of problems with mine when I got it. I daisy-chained wires between each light cluster (ie not the casing) and then ran a wire to the rear horizontal bar behind the bumper from the innermost cluster on each side. I still have it like that on my new lights and it seems to work.

I use very strong magnets to hold the ends of the earthing wires onto the metal frame FWIW. I tried a few other fastening methods but there always seemed to be a reason for the wire to lose a strong connection. The magnets, if strong enough, press the wire onto the metal and they haven't moved since.



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Post by Nick_B_GTE » Mon Nov 26, 2018 10:09 pm

Rimmer Bros also have the better type of bulb holder which allows for a separate earth wire for each bulb.

https://rimmerbros.com/Item--i-518042



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Post by Captain Beke » Thu Nov 29, 2018 1:01 pm

Have just received the Rimmerbros bulb holders and can confirm they DO NOT have the extra earth connection , but are better than what I have at the moment , However they do have the copper earth which will be easier to attach a new earth to, have found this link from TR6 site which explains with pictures how to do it http://bullfire.net/TR6/TR6-65/TR6-65.html
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Post by peter freeman » Thu Nov 29, 2018 9:06 pm

Worth IMO running a wire from the battery -ve to the rear lights as the earth wire to the chassis is often the cause of lightning problems - generally makes the lights brighter as well which is a bonus.



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Post by willholderogri » Fri Nov 30, 2018 7:54 am

email pnjclassics@gmail.com or phone 07757088020 they had a whole box of brand new bulb holders for the scims they were cheap but I cant remember how cheap £1 seems to spring to mind they did not know what they fitted either (Mention Allington cherished vehicle day if you contact them )


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Post by Pepe » Mon Dec 17, 2018 7:35 pm

I disassembled the standard rear light bulbholders and soldered earth wires to each of them... This properly sealed through the rubber caps and earthed to the chassis with eye terminals and stainless steel toothed washers works well until now. A little wax helps to seal it up.
Also to mount it on the rear rather than the front of the rear outriggers helped.

Didn't need the expensive new bulb holders. Just cost some black wire, eyelets, some washers ect.. The blade terminals clean and well insulated with heatshrink helps too...


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Post by scmarf » Sun Feb 17, 2019 1:09 pm

Update: I just called Rimmers to see if they supplied holders with the earth tab. They said they did do I ordered 50 GBP worth but when they arrived they did not have the earth tab so I sent them back. Rimmers confirmed I had been misled on the first phonecall. :bh
Back to soldering an earth wire to each holder.


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Post by gtcse8 » Sun Feb 17, 2019 1:51 pm

I have been doing an earthed bulb holder kit for years, comes complete with an earthing loom and instructions. :bh

I am however running out of the Stop/Tail holders as the quality I have been getting is rubbish, thanks Rimmers :cry: the spring mounting clips are always falling out, :dh
but I can supply the earthing tag to fit existing holders for £1.

The holders with proper earthing tags are £7.50 each the Loom is £4 each plus post. :W


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Post by willholderogri » Mon Feb 18, 2019 12:06 pm

try these they had a whole box of genuine holders
pnjclassics@gmail.com
gtcse8 wrote:
Sun Feb 17, 2019 1:51 pm
I have been doing an earthed bulb holder kit for years, comes complete with an earthing loom and instructions. :bh

I am however running out of the Stop/Tail holders as the quality I have been getting is rubbish, thanks Rimmers :cry: the spring mounting clips are always falling out, :dh
but I can supply the earthing tag to fit existing holders for £1.

The holders with proper earthing tags are £7.50 each the Loom is £4 each plus post. :W


1962 mini, bedford CA , KR200. morris 1000, mini pickup.several escorts,ford grandad.ford cortina X2 ,astra, SE5A x 2 ,ford focus.

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