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Merlin



Member Since: 30 Oct 2010
Location: Newmarket
Posts: 982
United Kingdom 
Premature failure of LEDs
I've tried fitting 21/5W LEDs as stop/tail lights but they fail prematurely. is this because they have a permanent feed, rather than being pulsed, as in Cambus wiring?

Does anyone have a fix?

Merlin
Post #508491 26th Feb 2016 7:54pm
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Roy5695



Member Since: 15 Feb 2014
Location: Cornwall
Posts: 1123
United Kingdom 2011 Defender 110 Puma 2.2 XS DCPU Indus Silver
Buy a set of Wipac units and all will be well Thumbs Up
Post #508503 26th Feb 2016 8:17pm
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rustyboxx



Member Since: 08 Oct 2012
Location: Poole
Posts: 548
United Kingdom 2015 Defender 90 Puma 2.2 CSW Montalcino Red
Cue Brendan Whistle 2015 90 XS CSW TDCi - Beautiful
2007 110 XS DCPU - An itch that needed scratching
2005 90 Td5 XS CSW - Utterly brilliant
2001 Discovery 2 ES Auto - A phase I went through
1996 90 Tdi CSW - Uber reliable
1989 90 2.5 Petrol Hardtop - My first proper Landy
1985 Range Rover Vogue V8 -Troublesome
Post #508507 26th Feb 2016 8:32pm
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Oakseywick



Member Since: 20 Dec 2014
Location: Cirencester
Posts: 1002
United Kingdom 2000 Defender 90 Td5 XS CSW Java Black
^^^ Rolling with laughter
Post #508514 26th Feb 2016 8:43pm
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Cupboard



Member Since: 21 Mar 2014
Location: Suffolk
Posts: 2971
United Kingdom 2011 Defender 110 Puma 2.4 HT Corris Grey
CAN bus is a data link, bulbs don't run on a data link. You can control lights with it (and much more besides), but that's not how a Defender works. You have to limit the current to an LED because unlike a bulb their resistance drops as they heat up so they don't self limit. The cheapest way is to put a current limiting resistor in but that has the obvious issue that it only works over a narrow voltage range. Cheap LED lamps do that, better ones have proper driver circuitry.

Your LEDs have most likely failed because they weren't built well, as are most retro-fit ones. They also happen to be illegal.
Post #508526 26th Feb 2016 9:09pm
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20923
United Kingdom 
Go for Wipac or RDX LED units, I have the latter. Very happy.
These are legal.
Post #508529 26th Feb 2016 9:11pm
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Screbble



Member Since: 26 Apr 2015
Location: Lancashire
Posts: 2274
United Kingdom 2004 Defender 90 Td5 XS CSW Zambezi Silver
Ditto^

RDX fitted on mine - disproportionate improvement for the money Thumbs Up
Post #508571 26th Feb 2016 10:34pm
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