Member Since: 18 Oct 2016
Location: Telford
Posts: 46
Slow high beam headlights
Hi,
I flashed my high beam at someone last night (to say thanks for letting me past) and the reaction time of the lights was very slow. It took a second or more for the high beam to come on. I was almost past the poor chap before the flash happened.
Is that correct or do you think the bulbs need swapping out? If they do - are there any that are recommended?
Thanks in advance.
Ian
16th Dec 2016 3:36 pm
Gareth Site Moderator
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26744
If you could fill out your profile with vehicle info, we could tell if you had halogen or xenon headlamps
Xenons have a flap that fully exposes the bulb for main beam, and it can get sticky.
16th Dec 2016 3:39 pm
ian-b
Member Since: 18 Oct 2016
Location: Telford
Posts: 46
OK, profile filed, sorry didn't realise.
2005 Discovery 3 TDV6 S Auto.
I suspect they are Halogen bulbs, but I don't know
16th Dec 2016 3:50 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72911
2005 S should have xenons.
16th Dec 2016 4:15 pm
Narpy
Member Since: 18 Jul 2011
Location: Stockport
Posts: 7830
Guesswork.
Post a picture of the headlight unit, that will reveal all. Mods:
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Garmin Nuvi + D4 Surround + Reversing Camera.
D4 Steering Wheel.
Rear Boot Spoiler.
Twin Brake Lights.
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Make your own Narpy grill thread
I'm not scared, I'm outta here.
16th Dec 2016 4:22 pm
Robbie
Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
The high beams should come on instantly, whatever the shutters are doing. You need to look at the lights and determine what you have and what they are doing.
Land Rover - Turning Drivers into Mechanics Since 1948
Doubt your issue is anything to do with the bulbs - they normally just work or blow. Do they gradually light up or is it just an outright delay? Can you measure the voltage reaching them?
(PS: Good quality but standard bulbs are best unless you are really concerned with aesthetics. LEDs are not suitable for retro-fitting as they cannot fit the focal point correctly.)Current: Discovery 3 06MY (55 reg) HSE Auto Zambezi Silver Allisport Fast Road Intercooler, V8 Brakes, Silicone IC Hoses, EGRs Blanked, Remapped, De-Cat pipe, FBHIC
Freelander 2 2007 HSE Manual Tambora Flame
Previous: FL2 56 reg SE Manual Black (written off )
Disco 3 06 reg B7S Manual Rimini Red
Disco 2 TD5 Y reg ES Manual Blue - Chipped
Several Discovery 300 TDis
19th Dec 2016 3:39 pm
Kilovolt
Member Since: 29 Jun 2015
Location: South Derbyshire
Posts: 1043
I'm betting there is a relay between the instrument stalk and the headlight? It is not uncommon for them to slow with age (especially if the flywheel diode is/has failed).
Not something I have but a schematic of that circuit would be helpful - i'd be surprised if someone here can't help you with that? Anyone?
Just my thoughts."Track day running - Don't put your foot back on the accelerator until your absolutely sure you don't have to take it off again"
Current Ride: D4 XS Commercial Baltic Blue SDV6 fully loaded with heated everything
Track Days: BMW E36 M3 Evolution MY 1996 (3.2 Litre 377 BHP sat in 1,250 Kgs of car, with a pro safety cage and some serious braking power)
Not quite so simple, unfortunately - it's FETs controlled by the BCM that do the job. Diagram here: http://www.disco3.co.uk/gallery/albums/use...ghting.pdfCurrent: Discovery 3 06MY (55 reg) HSE Auto Zambezi Silver Allisport Fast Road Intercooler, V8 Brakes, Silicone IC Hoses, EGRs Blanked, Remapped, De-Cat pipe, FBHIC
Freelander 2 2007 HSE Manual Tambora Flame
Previous: FL2 56 reg SE Manual Black (written off )
Disco 3 06 reg B7S Manual Rimini Red
Disco 2 TD5 Y reg ES Manual Blue - Chipped
Several Discovery 300 TDis
19th Dec 2016 4:02 pm
Kilovolt
Member Since: 29 Jun 2015
Location: South Derbyshire
Posts: 1043
I had a feeling that was coming I'll go back to sleep "Track day running - Don't put your foot back on the accelerator until your absolutely sure you don't have to take it off again"
Current Ride: D4 XS Commercial Baltic Blue SDV6 fully loaded with heated everything
Track Days: BMW E36 M3 Evolution MY 1996 (3.2 Litre 377 BHP sat in 1,250 Kgs of car, with a pro safety cage and some serious braking power)
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
Allisport Fast Road Intercooler, V8 Brakes, Silicone IC Hoses, EGRs Blanked, Remapped, De-Cat pipe, FBHIC
)
I'll go back to sleep 
