 | Home > Technical > Correct headlamp and parking lamp operation 1995 110 |
 
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17353   
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It's possible that you are suffering the consequences of an eccentric British phenomenon known as "dim dip". Someone (who should never have been let out without adult supervision) decided it would be a good idea if turning on the sidelights (they're not parking lights on this side of the pond) with the engine running made the headlights come on at reduced power. The idea was that gormless road users would be more likely to see you coming, but all that happened was they became more gormless so now we have to have daytime running lights and cars which switch their own headlights on because drivers are no longer able to work switches.
The UK made this a legal requirement, then the ECE, in a rare moment of sense, rule that it was illegal for the UK to make it a legal requirement, so most manufacturers then dropped the idea. Land-rover did not, and commercial variants of the Defender continued to have this undesirable feature for years. The main problem is that it destroys H4 bulbs to run them under-voltage. For LED lights to a vehicle with dim dip you need to disable the dim dip because LED lights don't work on half power. Normally this is done by unplugging the dimming resistor (usually located the RH front wing) but if someone has shorted it instead the lights will behave like yours. |
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5th Oct 2022 5:25pm |
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| nolift911 Member Since: 24 Nov 2021 Location: Virginia Posts: 11  
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OK so on a 94 build would this be applicable. Thanks for the clarification on the side lights and parking lights. The headlights do not seem to be at reduced capacity but rather full strength - RH front wing so drivers side, engine bay or where the headlight is? What does the resistor look like?
Thanks for the response and explanation... Jeff |
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6th Oct 2022 12:29pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17353
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If it is the same as the TD5 and TDCi, the it looks like this:
 Click image to enlarge (Image courtesy of forum member "rustandoil" in another thread). On the TD5 and TDCi it is located a little bit forward from the aerial mounting hole, between the aerial and the blanking plate on the wing top on the right hand (i.e., driver's side in the UK) side. This is about 1 foot forward of the bulkhead, and it is tucked under the upper surface of the wing in a manner which makes it hard to see. It is possible that on a LHD vehicle it might be under the left hand wing, I'm afraid I don't know. It is also, of course, possible that you no longer have one and someone has joined the wires together. This would cause the effect you are experiencing, but might make finding the location of the crime a bit harder. |
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6th Oct 2022 12:39pm |
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| geobloke Member Since: 06 Nov 2012 Location: Nottinghamshire Posts: 4410
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If you have a Dim Dip relay it will be the BIG pink thing hidden behind the dash (YWC10050). If you do not want Dim Dip then you can fit an equivalent relay (YWZ10003). This should remove the Dim Dip function and only turn on your side lights.
Now if you want a very easy and importantly because you are in the US cheap way of doing this all you need to do is bridge the connectors 2 and 8. The YWZ10003 relay literally contains just a solid bridge connector. Job done. You can leave the under-wing resistor in place.  |
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6th Oct 2022 1:08pm |
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| nolift911 Member Since: 24 Nov 2021 Location: Virginia Posts: 11
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OK great what part of the dash cluster or fuse panel or?
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6th Oct 2022 5:24pm |
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| geobloke Member Since: 06 Nov 2012 Location: Nottinghamshire Posts: 4410
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Behind the speedo cluster. It should be mounted to the bulkhead behind but may be underneath/hidden by the wiring loom.
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6th Oct 2022 5:44pm |
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| nolift911 Member Since: 24 Nov 2021 Location: Virginia Posts: 11
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Thanks!
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6th Oct 2022 6:19pm |
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| Dinnu Member Since: 24 Dec 2019 Location: Lija Posts: 3410  
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There is a good write up on the following site:
https://www.landroverexpedition.com/techni...dip-relay/ 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing 2012 90 CSW, 2.2TDCI, Santorini Black |
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6th Oct 2022 7:03pm |
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| diesel_jim Member Since: 13 Oct 2008 Location: hiding Posts: 6092 
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My 110 does the same.. (Td5), as I've fitted LED headlight bulbs, even the reduced voltage supplied by the dip-dip unit (IIRC it was 1/6th the brightness, so 2.3v if the alternator is kicking out 13.8v) makes my LED lights illuminate at full brightness.
I must pull it out sometime. (the relay that is....) |
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8th Oct 2022 4:13pm |
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