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Bundy



Member Since: 21 Sep 2020
Location: Cheshire
Posts: 98

United Kingdom 
Anyone know what this heat sink is?
As title...pulled wing off for fitting a roll cage and found this disconnected behind the wing...drivers side only


Click image to enlarge



Click image to enlarge


What’s it for and should it be connected??
Thanks in advance
Al
Post #889359 6th Mar 2021 1:34am
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donmacn



Member Since: 07 Nov 2017
Location: Nth Scotland
Posts: 1829

Dim/Dip - cr@p idea in the first place, and your light bulbs will thank you for leaving it disconnected.

I think there's a relay, or relay socket behind the dash somewhere that also needs/needed attention to disable this, but if the resistor is unplugged then hopefully your relay will already be sorted.

I did this on mine years ago and have forgotten all the details, but if you were to search here, or google Defender dim/dip I'm sure you'd find all the info. Donald

1994 Defender 300Tdi 110 SW - owned since 2002 - 230k miles and going strong
(The 'rolling restoration' or tinkering thread: http://www.defender2.net/forum/topic58538.html )
2000 Range Rover P38 4.0L V8

in the past..
RR classic - fitted with 200Tdi
1984 RR classic - V8 with ZF auto box
1993 Discovery 300Tdi

not to mention the minis and the Type 2 VW camper...
Post #889363 6th Mar 2021 2:34am
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diesel_jim



Member Since: 13 Oct 2008
Location: hiding
Posts: 6031

United Kingdom 2006 Defender 110 Td5 SW Epsom Green
Was a weird UK road regulation (my 200Tdi had it back in 1992) so if you were driving (or at least ignition "on") with just the sidelights switched on, the headlights would illuminate dimly

I think that resistor dropped the brighness to either 1/10th or 1/6th of normal brightness



Or just replicated a sealed beam! Rolling with laughter
Post #889376 6th Mar 2021 9:20am
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LandRoverAnorak



Member Since: 17 Jul 2011
Location: Surrey
Posts: 11240

United Kingdom 2013 Defender 110 Puma 2.2 USW Orkney Grey
donmacn wrote:
I think there's a relay, or relay socket behind the dash somewhere that also needs/needed attention to disable this, but if the resistor is unplugged then hopefully your relay will already be sorted.

It's either/or to disable the dim-dip. Either unplug the resistor as per the pictures or change/adapt the pink relay behind the instrument binnacle.

At one point, LR even offered a specially adapted relay to replace the original, which is basically a shell with just a link wire between two of the terminals inside.

The only other thing I'd add is that connector will still be live when the side lights are on, so it'd be worth taping it up properly. Darren

110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak

"You came in that thing? You're braver than I thought!" - Princess Leia
Post #889377 6th Mar 2021 9:32am
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discomog



Member Since: 09 May 2015
Location: Notts/Lincs Border
Posts: 2494

United Kingdom 2015 Defender 90 Puma 2.2 XS CSW Santorini Black
Diesel Jim must have had one of the last vehicles equipped with dim-dip as this stupid idea was withdrawn in 1992 at the same time as the French did away with yellow headlights - all thanks to the EU who harmonised headlamp regulations across Europe. (One of the few good ideas to come out of the EU). Defender 90XS SW
Mini Countryman Cooper S
Morgan Plus 8
Post #889379 6th Mar 2021 9:36am
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Retroanaconda



Member Since: 04 Jan 2012
Location: Scotland
Posts: 2545

Scotland 
It might have been withdrawn but Land Rover kept fitting it right through until at least Td5 era. I have a 2006 loom with it fitted.
Post #889380 6th Mar 2021 9:44am
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LandRoverAnorak



Member Since: 17 Jul 2011
Location: Surrey
Posts: 11240

United Kingdom 2013 Defender 110 Puma 2.2 USW Orkney Grey
Despite the rule change, LR continued to fit dim dip to some Defender models for years afterwards right up to the Puma. Darren

110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak

"You came in that thing? You're braver than I thought!" - Princess Leia
Post #889381 6th Mar 2021 9:45am
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 16857

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
My 2007 County-spec Puma 110 DC left the factory with dim dip, LR was still fitting the abomination to commercial-spec vehicles then. If you bought a non-commercial you got headlight level adjusters, commercial got dim dip.

I don't know when this stopped, possibly when all Defenders became N1.

It's an utterly useless feature, the most stupid idea since rear fog lights. It also kills headlight bulbs.
Post #889390 6th Mar 2021 10:29am
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Bundy



Member Since: 21 Sep 2020
Location: Cheshire
Posts: 98

United Kingdom 
Thanks everyone. Will check if it’s still live and tape it up.
Mines an 09 Puma for reference 😉
Cheers
Al
Post #889391 6th Mar 2021 10:31am
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markb110



Member Since: 22 May 2010
Location: Guildford
Posts: 2520

England 2002 Defender 90 Td5 HT Epsom Green
Bendy, I used a spare plug set, sealed the open ends up with Dum Dum and used those to seal the now open ends.

That way you won’t have to worry about the tape ever coming off and getting water damage to the exiting loom.
Post #889476 6th Mar 2021 6:26pm
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Slideywindows



Member Since: 09 Sep 2016
Location: North Essex
Posts: 1283

England 
Learnt something here. Thank you.

My 1996 County Hard Top still has dim-dip.


(Didn't Harry Enfield have a similar sounding character? Whistle )
Post #889495 6th Mar 2021 7:22pm
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L110CDL



Member Since: 31 Oct 2015
Location: Devon
Posts: 10476

England 
^ ^ ^

Yes he did Slideywindows Wink

I have just got rid of the dim-dip on Millie Very Happy 1996 Golf Blue 300Tdi 110 Pick up. Keeper.


Clayton.
Post #890038 8th Mar 2021 11:26pm
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excossack



Member Since: 22 Feb 2012
Location: North West
Posts: 5736

United Kingdom 1999 Defender 110 Td5 SW Caledonian Blue
and I am trying to fix it on my Td5 110. I think its the relay. (i like the feature) 1999 Defender TD5 110

Regards
John M0VAZ
Econet Station 48 no clock
Post #890090 9th Mar 2021 9:44am
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 16857

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
markb110 wrote:
... That way you won’t have to worry about the tape ever coming off and getting water damage to the exiting loom.


It's worth remembering that there are many unused connectors on a Defender and you won't get any loom damage leaving them uncapped, unless you think you might want to reuse them in the future when crud ingress could be a problem. A small plastic bag and some insulating tape, or a piece of pallet wrap, will do the job if need be.
Post #890101 9th Mar 2021 10:19am
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