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Lucas L549 rear lights - original internal insulation

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capitano Avatar
capitano Daran Scarlett
Northampton, Northamptonshire, UK   GBR
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1959 MG MGA "Cassy"
Hi all,

Whilst in the thick of revamping my rear lights, I've noted that I have remnants of plastic foil (?) around the connectors either side of the bulb holder. I found the image online of what looks like an original unit, that looks to have some sort of clear plastic /cellulose insulation shielding around these connectors. It's more apparent when the wiring isn't in place - has anyone got a picture of their original lamp bases with this in place?

I'm assuming it did have a purpose in preventing shorts from the bullet connectors.


If so, is it worthwhile putting back in, is it available from anywhere or do I need to replicate it somehow?

Thanks


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Lucas L549 inside original.JPG    43.8 KB
Lucas L549 inside original.JPG

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Rob-USLE Rob DE JOODE
Rotterdam, ZH, Netherlands   NLD
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Maybe the chaps on the MGA forum might shine more light on this topic ?

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capitano Avatar
capitano Daran Scarlett
Northampton, Northamptonshire, UK   GBR
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1959 MG MGA "Cassy"
Oops - apologies I have chosen the wrong forum by mistake. Is it possible to transfer this across to the MGA Forum?

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Skye Webmaster Skye Nott
Kamloops, BC, Canada   CAN
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1964 Vespa VNB 125
1966 MG MGB "The Bomber RIP"
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JIMBV8 Avatar
JIMBV8 Jim Gibson
Northampton, Northamptonshire, UK   GBR
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That insulation piece should not be there; it looks as if it would prevent the bulb from making any contact. There is a fixed piece ( visible in the picture you show ) that separates the mounting screw from the connectors on the bulb socket, and the connectors from the body of the base.

And, for those who aren't aware, the connectors are not the same as the bullet connectors within the wiring harnesses. They were not soldered or crimped, the bare wires just bent over and the connector pushed in. These are sometimes referred to as Earthing Sleeves ( so maybe were only used where an earth connection was needed, instead of relying on the mounting screws ? ).
Either way, I think that many people do use the usual bullet connectors.


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Photo0636.jpg

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capitano Avatar
capitano Daran Scarlett
Northampton, Northamptonshire, UK   GBR
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1959 MG MGA "Cassy"
Jim,

Thanks for the details - did you mean it should be there for the reasons you gave? Mine has all broken off, so I've fashioned replacements and slotted them behind the connectors and bulb holder. Otherwise, it would seem that a loose wire on either side or a careless screwdriver in the middle could short the connections.

The earthing sleeves are described in Barney's pages and on mine at least, seem to make a snug connection when used as described.

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dominic-ch Dominic Clancy
zurich, zurich, Switzerland   CHE
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It SHOULD be there, and is on any original I have handled, and also on the better quality reproductions

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JIMBV8 Jim Gibson
Northampton, Northamptonshire, UK   GBR
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OK, now I can see your picture on a better screen I see where I was confused.

What I took to be the piece of insulation you were discussing is actually a piece of wire linking the two connectors.

The clear plastic insulation is primarily between the live contacts and the grounded base; but that tab at the top would, as you say, prevent a careless screwdriver from shorting connections. ( But why would you have the lights on while tightening that fixing screw ? smiling smiley )

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capitano Avatar
capitano Daran Scarlett
Northampton, Northamptonshire, UK   GBR
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1959 MG MGA "Cassy"
No worries Jim, I think it's there as a precaution., I certainly won't be poking around in there with a screwdriver whilst the power's on!

Just tidying up the wiring today, and then I'll post some pics/vid of the new LED setup.

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