Member Since: 12 Dec 2017
Location: Wales UK
Posts: 230
D3 to D4 headlight conversion - headlight wiring
Could any of you help me out with the following at all?
I’m trying to work out what wires to change to complete the headlight conversion all parts are now fitted my d3 had non afs xenon and I’ve gone with non afs 2015 model headlights. All working fine apart from,
1:No high beam when you flash headlight stalk with headlights off ( works fine with them on)
2:No bright drl when start up. Knew this would need a power input upon ignition but unsure where feed needs to go.
3:Indicators flash fine on vehicle exterior but extra fast on dashboard display.
Any help would be greatly appreciated
I'm sure there's information on here from others. But the indicators are due to the fronts now being LED and the car looking for bulbs, you'll need to fit resistors to them.
The headlamp flash issue needs a relay and wiring added to switch the bulb on as well as operate the shutter for main beam.1972 Range Rover Classic 2 door V8
2013 Land Rover Discovery 4 HSE - SCRAPPED
2016 Land Rover Discovery 4 Landmark
2022 Volvo XC40 T5 PHEV 282HP FWD 3 cylinder!
9th Mar 2018 11:56 am
Ambit
Member Since: 12 Dec 2017
Location: Wales UK
Posts: 230
Thanks, I’ve had a good search on here but not found a specific guide or ‘how to’ which I will put up here once sorted, if you have any images or wiring diagrams could you list them here of the relay wiring that needs to be done. As the D3 didn’t have Drl’s at all from new I would think that I am going to have to run an ignition feed into each headlamp to get the bright signature drls to illuminate once the engine is started. If anyone has the wiring diagram for the headlight socket on the back of the 2015 headlamp that would be really helpful below is a pic of the socket on the rear of my headlight
9th Mar 2018 5:12 pm
darrind
Member Since: 04 Jul 2008
Location: In A World of My Own!
Posts: 2863
There is also an issue getting the DRL or sidelight LED to dim when the indicator flashes in the way that the factory fitted ones do - I was told this will be needed to meet the new MOT requirements from May onwards by someone last week.Must stop buying shiny toys....
9th Mar 2018 6:02 pm
Ambit
Member Since: 12 Dec 2017
Location: Wales UK
Posts: 230
Yes was gonna cross that bridge once I had actually got the drls working
9th Mar 2018 10:46 pm
CJP2017
Member Since: 27 Feb 2017
Location: London
Posts: 183
hey, any luck with wiring up the DRL to ignition so the LED strip stays on?
thanks
29th Mar 2018 8:37 am
Ambit
Member Since: 12 Dec 2017
Location: Wales UK
Posts: 230
Yes really simple took a ignition feed from the under bonnet fuse box. Tapped into that feed wire underneath the fuse box and ran wiring through to each headlight. So high power drls came on with ignition. Then fed the feed for side lights from the loom into the lower power for the dry so they dim with side lights. Then the rest was done through coding.
10th Aug 2018 10:44 am
discoverybrazil
Member Since: 07 Aug 2018
Location: sao paulo
Posts: 102
Re: D3 to D4 headlight conversion - headlight wiring
Ambit wrote:
Could any of you help me out with the following at all?
I’m trying to work out what wires to change to complete the headlight conversion all parts are now fitted my d3 had non afs xenon and I’ve gone with non afs 2015 model headlights. All working fine apart from,
1:No high beam when you flash headlight stalk with headlights off ( works fine with them on)
2:No bright drl when start up. Knew this would need a power input upon ignition but unsure where feed needs to go.
3:Indicators flash fine on vehicle exterior but extra fast on dashboard display.
Any help would be greatly appreciated
great job man!! my disco have a upgrade but head lights i cant do it! my dream
i saw your gallery its really difficult !
post more pics to us
thanks
LR3 ON ROAD ONLY
10th Aug 2018 2:47 pm
RimvydasHat
Member Since: 31 May 2017
Location: Vilnius
Posts: 4
whitch exact pin in MY15 headlight is for DRL?
as drl now works in dim mode i tried to feed 12v to pin8 but still nothing
5th Sep 2018 3:00 pm
Ambit
Member Since: 12 Dec 2017
Location: Wales UK
Posts: 230
I didn't record pin outs. Just used a power probe and with headlight earthed I then put 12v to all pins to establish which was high and low on the DRL.
14th Sep 2018 10:05 am
RimvydasHat
Member Since: 31 May 2017
Location: Vilnius
Posts: 4
SOLVED. it's pin 8 on headlight for the bright DRL.
24th Sep 2018 7:49 am
CJP2017
Member Since: 27 Feb 2017
Location: London
Posts: 183
oh wow RimvydasHat!!!
i just tried that to test pin 8 and it looks amazing!!!!
however now comes the issue with dimming the LED when the indicator is on. anyone any luck?
thanks all!
10th Dec 2018 4:51 pm
Ambit
Member Since: 12 Dec 2017
Location: Wales UK
Posts: 230
Yes I found the feed when side lights are on there’s a pin for input from side lights so when engine is on and drls are bright out 12v from a power probe or run a length of cable from positive terminal on battery into any empty pin on the rear of the headlight plug and when the drl dims you’ve found your input. Then wire the sidelight output wire into this pin job done
11th Dec 2018 2:52 am
LR3norway
Member Since: 25 Dec 2016
Location: NORWAY
Posts: 193
Been thinking off doing this for 2 years. finally got it on the list.
Deactivated Scandinavian Light setting.
ACC on the pin8 turns on the DRL. With a NC relay on, switched off by the xenon.
So with light switch on AUTO, there is only DRL led in daylight. Xenon (with low led) and taillights at night.
Still one problem thought, with light switch in position 1, the parklight (sidelight you call it?) also is autoswitched. So no parklight in daylight. Have to figure something out to sort that.
Last edited by LR3norway on 14th Dec 2018 1:39 pm. Edited 1 time in total
14th Dec 2018 1:14 pm
LR3norway
Member Since: 25 Dec 2016
Location: NORWAY
Posts: 193
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finally got it on the list.
