Headlamp plug/socket

Technical advice Q&A
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ChrisC
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#21

Post by ChrisC » Sat May 11, 2013 3:04 pm

Just been routing through my spares and I found another old bonnet plug (albeit with broken insulation) and I bow to Peter's superior knowledge / memory.

The one I just found has the pins in a regular patten just like Steves photo. The other one I looked at doesnt and they are staggered. Looking closer the regular spaced one has brown bakelite discs as insulations whilst the staggered one is plastic. So I am tempted to think that the regular spaced one was probably my original and not the other... neither are actually of any use so I have binned both.

One thing I noticed though is that the regular spaced one had different sized pins (which i guess stops incorrect insertion) and the irregular plug has pins of the same size. I am guessing this is why dealers sell plug and socket as a unit...

Apologies Steve - I was wrong. The trailer plug/socket is a good tip though if you are not going concours - I can see that would work
1964 FHC 4.2
Etype restoration blog http://connor.org.uk

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PeterCrespin
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#22

Post by PeterCrespin » Sat May 11, 2013 7:39 pm

The different sized pins is what constitutes the keying on the originals. It normally works fine because the only way it will go home snug and with reasonable force is with all pins lined up correctly.

However, as we have seen, in unfamiliar hands it is possible to at least attempt coitus whilst not having the multiple pins correctly orientated. If the owner doesn't realise what normal assembly pressure feels like or how firmly the correctly-mated parts should fit together, a lighting incongruity will at least prompt them to reassess matters, as it did with Steve. Assuming no excess force was used and the bruised male and female parts remain in sufficiently good condition, it is normally possible to effect a prolonged trouble-free union.

Pete
1E75339 UberLynx D-Type; 1R27190 70 FHC; 1E78478; 2001 Vanden Plas

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vikla
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#23

Post by vikla » Sat May 11, 2013 10:15 pm

Well it took a few days but we got to the bottom of it eventually......thanks guys for all your help.
......and a beautifully put finale, Pete

PS - if anyone is looking for a new repro plug, here's one on special offer at ?68 - http://www.jaguarworldwide.com/c16921-8 ... 7346-p.asp

although I see on eBay caravan plug/sockets can be had for about a tenner.
Steve
S1 4.2 FHC 1966

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