![]() | Home > Technical (L405) > No headlight main beams |
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Andy S Member Since: 16 Jun 2013 Location: Sevenoaks Posts: 1041 ![]() ![]() ![]() |
I’d be interested to see the responses. My new car, a 2021 MY P525 has the same light set up and whilst I’ve yet to drive it in the dark, it seems odd to me that I can’t keep the headlight switch in the on position, as I discovered when I wanted to switch the headlights on in low light conditions during a recent journey in pouring rain. |
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Kot Member Since: 10 Mar 2021 Location: broadland Posts: 1261 ![]() ![]() |
Does your code reader also clear DTC's? If it does not, get a cheap Autel AP200 or similar, clear all codes and see if it fixes the problem or if it returns.
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Kot Member Since: 10 Mar 2021 Location: broadland Posts: 1261 ![]() ![]() |
I always keep mine in the Auto position, it comes on during low light conditions! Adaptive lights are amazing. Look also at the related information tab. https://www.ownerinfo.landrover.com/docume...1/G2418244 2018 SE SDV8 4.4 Byron Blue |
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firstrr Member Since: 27 Sep 2024 Location: Lancashire Posts: 14 ![]() ![]() ![]() |
Thanks Kot. Yes I’ve cleared the dtcs and the problem remains, no main beams although the blue dash light comes on when operating the stalk. It was a long shot but I thought that neither beam coming on might have been a quick fix from a members previous experience. I’ll have to work through the checklists when I get chance. Thanks again. |
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firstrr Member Since: 27 Sep 2024 Location: Lancashire Posts: 14 ![]() ![]() ![]() |
So, as we all should, I started with basics and examined the wiring to the headlight units, they are pixel LED. Drivers side looked ok, then passenger side, a broken wire - see photo. Not a fresh break in my opinion so I reckon the MOT was dodgy from the dealer. Anyway, had to unbolt the one bolt from the coolant expansion tank to be able to remove the plug from the headlight. Fixed the wire and main beams working fine. However, moving the coolant expansion tank caused the thin top pipe from the radiator to the expansion tank to break. Coolant on the floor when I started the engine. 🤬 Amazingly the local LR dealer had one on the shelf, apparently a common problem, they get brittle and break! Great!!
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stan Site Moderator Member Since: 13 Jul 2010 Location: a moderate moderated moderator moderating moderately in moderation Posts: 35485 ![]() ![]() |
result ! |
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go_ko4 Member Since: 06 Nov 2024 Location: CH Posts: 3 ![]() ![]() |
welll. Wow! Thx a lot for sharing - I got Velar with the same "stuck or low problem" on both high beams with the same symptomatic. But in my case one of the headlights is 20MY and other 18MY I thought that this was the problem while the firmware gateway fault. Now I will check for harness more detailed. So as I catch - Your highbeams now works fine? Can You pls upd me what color or nr. of the wire set this problem*
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firstrr Member Since: 27 Sep 2024 Location: Lancashire Posts: 14 ![]() ![]() ![]() |
It was the brown wire - high beam signal wire - to the back of the connector of the passenger side headlight unit. See my pic of the broken wire.
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firstrr Member Since: 27 Sep 2024 Location: Lancashire Posts: 14 ![]() ![]() ![]() |
Just to clarify, this one broken wire caused both main beams to be inoperative even though the blue light came on the instrument cluster indicating that they were on.
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go_ko4 Member Since: 06 Nov 2024 Location: CH Posts: 3 ![]() ![]() |
In Your way its passenger side - in my its driver like EU version (: - the left one* well I catch that it was damaged and replaced to the used headlight - but all the wires looks ok except few - moving inside the plug in the range of +/- 2 mm I don`t think that it is the problem but I would better replace and re-pin whole plug* who knows - maybe it will helps.
![]() ![]() ========================== B1D02(23) Raw code: 9D0223 ECU: BCM Status: Pending, Confirmed, Test failed since last DTC clear, Test not completed during this operation cycle ========================== B1D03(23) Raw code: 9D0323 ECU: BCM Status: Pending, Confirmed, Test failed since last DTC clear, Test not completed during this operation cycle ========================== B1D02(23) Raw code: 9D0223 ECU: Body Control Module/Gateway Module Status: Pending, Confirmed, Test failed since last DTC clear, Test not completed during this operation cycle ========================== B1D03(23) Raw code: 9D0323 ECU: Body Control Module/Gateway Module Status: Pending, Confirmed, Test failed since last DTC clear, Test not completed during this operation cycle |
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go_ko4 Member Since: 06 Nov 2024 Location: CH Posts: 3 ![]() ![]() |
as You can see the mistakes are setting on the Gateway Module of BCM... I'm really hope that this is not the data problem and its in the BCM cause its a last control unit where data (signal) is indicates as lost* like no needed parameters to indicate, as OK. |
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firstrr Member Since: 27 Sep 2024 Location: Lancashire Posts: 14 ![]() ![]() ![]() |
We need a technical expert member to look at these results for you, it's a bit beyond my experience.
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