Headlights not working

[Miffy]

Hi there
Apologies for the basic question.
The headlights stopped working on my 2013 Disco 4. High beam and everything else still works. I think it's a blown fuse but the book is not clear which one does the headlights. I've tried checking a couple of fuses but all were ok. Can anyone advise what number fuse is for the headlights.
Thanks in advance.

[Graeme]

The headlights are not individually fused but check the 40A and 50A fusible links in the engine bay fuse panel as they supply the BCU which powers the headlights using transistors (FETs).

[Miffy]

The headlights are not individually fused but check the 40A and 50A fusible links in the engine bay fuse panel as they supply the BCU which powers the headlights using transistors (FETs).
Thanks Graeme

[Graeme]

Did you find the cause?

[Miffy]

Did you find the cause?

Unfortunately not. It must be one of the fuses in the dashboard panel. Ive checked and replaced fuses 49 & 50 which are listed as adaptive front lighting with no success.

[Graeme]

The one 50A fuse supplies the dipped and main beams and fog lights, switched by the several FETs inside the BCU. If any of these lights are working then the 50A fuse is OK. If there is a short circuit on any 1 light/beam then the FET won't supply power to that light/beam but will to the same light/beam on the other side as there is 1 FET for each bi-xenon, high beam and fog light.

In case the light switch is the culprit...
Does high beam work when switching to high beam or only when flashed?
Do the parkers work with the light switch on parkers?

Does your vehicle have high-beam fill-ins or DRLs? I don't recall when DRLs replaced the fill-ins.

[Miffy]

The one 50A fuse supplies the dipped and main beams and fog lights, switched by the several FETs inside the BCU. If any of these lights are working then the 50A fuse is OK. If there is a short circuit on any 1 light/beam then the FET won't supply power to that light/beam but will to the same light/beam on the other side as there is 1 FET for each bi-xenon, high beam and fog light.

In case the light switch is the culprit...
Does high beam work when switching to high beam or only when flashed?
Do the parkers work with the light switch on parkers?

Does your vehicle have high-beam fill-ins or DRLs? I don't recall when DRLs replaced the fill-ins.

Apologies for not responding earlier but I didn't see the message. Thanks for your input. All other lights working as they should that's why I'm thinking it's an obscure fuse. I'll go through it again today and double check everything.

[theelms66]

Check your globes wouldn't be the 1st time I seen 2 blown filaments .

[letherm]

I have a similar problem but only 1 side so I presume it's simply a globe.

Anyone know an easy way to tell whether they are halogen or xenon ? From looking at a PowerfulUK video there is a ballast at the back of the headlight for xenons.

Mine is a 2013 HSE made October that year.

Saw these if halogen as I would probably replace both sides assuming that the other will eventually fail too.

https://www.powerbulbs.com/au/product/osram-night-breaker-200-h7-twin

Thanks
Martin

[BMKal]

Anyone know an easy way to tell whether they are halogen or xenon ? From looking at a PowerfulUK video there is a ballast at the back of the headlight for xenons.

Thanks
Martin

If they are xenon, you would know it. When you first turn them on, they flash very bright and then the light intensity drops right off before slowly coming back up to their normal operating state.

Light output from xenon is very white - almost blue, whereas halogen globe output is yellow by comparison.

[letherm]

If they are xenon, you would know it. When you first turn them on, they flash very bright and then the light intensity drops right off before slowly coming back up to their normal operating state.

Light output from xenon is very white - almost blue, whereas halogen globe output is yellow by comparison.

Thanks, certainly halogen then.

[Eric SDV6SE]

Bi xenon main beam for comparison179985

Second photo is in-fill lamp with Stedi led copperhead upgrade

179987

[kelvo]

I have a similar problem but only 1 side so I presume it's simply a globe.

Anyone know an easy way to tell whether they are halogen or xenon ? From looking at a PowerfulUK video there is a ballast at the back of the headlight for xenons.

Mine is a 2013 HSE made October that year.

Saw these if halogen as I would probably replace both sides assuming that the other will eventually fail too.

OSRAM NIGHT BREAKER 200 H7 | Twin Headlight Bulbs | PowerBulbs AU (https://www.powerbulbs.com/au/product/osram-night-breaker-200-h7-twin)

Thanks
Martin
A MY13 (8-speed) HSE had Xenon headlights as standard factory fitment. Look at the stickers on the top of the headlights they should specify halogen or Xenon.

[letherm]

A MY13 (8-speed) HSE had Xenon headlights as standard factory fitment. Look at the stickers on the top of the headlights they should specify halogen or Xenon.
Thanks, I'll have a look tomorrow when it's dark and rainy :)

Martin

Meant to say NOT dark and rainy :)

[letherm]

I looked this morning and it is a xenon not halogen. Saved my bacon there Kelvo. I need to get my eyes checked I think.

I have 2 lights - one low beam one high beam. I presume being that there are 2 that this would be xenon not bixenon which, from what I've read has a shutter that moves to go to high beam. Slightly confused as you can no doubt tell.

Any advice appreciated.

Martin

[BigJon]

I have seen D4 xenon bulbs fail, it isn't uncommon.
Probably more uncommon for both to be gone, but you could have been driving with only one working for quite some time.

[BMKal]

Bi xenon main beam for comparison179985

Second photo is in-fill lamp with Stedi led copperhead upgrade

179987

I've recently done the same to mine. The Stedi copperhead globes make a big difference from the original globes - actually makes the in-fill lights useful for something. [biggrin]

[josh.huber]

My MY11 blew a xenon, I put stedi globes in. One flickered out of the box, they were great with warranty

[josh.huber]

The Globe is in the manual d35s I think

[letherm]

How do I tell if I have bixenon or just xenon or is it one and the same thing and what model should I use. I see H7 D2 etc. etc. ? No idea what to buy now :(

Martin

[BMKal]

How do I tell if I have bixenon or just xenon or is it one and the same thing and what model should I use. I see H7 D2 etc. etc. ? No idea what to buy now :(

Martin

Xenon output is a very clean, white light.

Bi-xenon I believe is more of a "rainbow" effect when you shine them against a solid wall. [bigwhistle] :wasntme:

180030


On a serious note, my understanding is that "bi-xenon" refers to the fact that the single xenon globe behind the "projector" lens in each headlight operates in both high and low beam - a shutter directs the light to give the different light patterns. In the early D4's (like mine) - this light gives me both high and low beam. The larger light lower in the cluster which has a halogen globe operates WITH high beam and is referred to as an "in-fill" light. These are generally pretty useless as they tend to point upwards (possum spotters) and cannot be adjusted without adjusting the whole headlight assembly, which in turn puts your High/low beam "bi-xenon" out of adjustment.

I have never bothered with the "in-fill" lights as I have extra driving lights which pretty much make them completely redundant - but I have recently replaced the halogen globes in them with Stedi "copperhead" LED globes which has made them at least appear white rather than dull yellow, and does give a little more light if I am driving on high beam without the extra driving lights.

I'm not sure how the headlights / globes are configured in later models - mine is a MY2011 model.

[Eric SDV6SE]

What BM Kal said....

[letherm]

Thanks gentlemen

So, are these OK?

OSRAM Xenarc Night Breaker Laser D3S Globes (Twin) | PowerBulbs AU (https://www.powerbulbs.com/au/product/osram-xenarc-night-breaker-laser-d3s-twin)


Martin

[letherm]

The Globe is in the manual d35s I think

I dug out my manual and you're correct Josh. Xenon D35 - 35 watts

Thanks, I hadn't thought of that.

Martin

[Tombie]

I dug out my manual and you're correct Josh. Xenon D35 - 35 watts

Thanks, I hadn't thought of that.

Martin

Just for clarity…

D3S (not D35) - 35w

And yes the Osram ones are excellent.
Replace both at once and keep the working old one for an emergency spare.

[letherm]

Just for clarity…

D3S (not D35) - 35w

And yes the Osram ones are excellent.
Replace both at once and keep the working old one for an emergency spare.

Thanks Mike.

My manual definitely says D35 not D3S - must be a misprint. Your comment makes more sense of what I've been seeing advertised i.e. D3S not D35.

Martin

[veebs]

I recall it was difficult to google, as I kept getting hits for discovery 3 ‘S’ models - D3S

[JamieG]

Hi,

Discovery 4 2013 HSE

Am I being silly or missing something blindingly obvious, but my flash only works when I have my headlights on. I've been casually 'flashing' people to let them through (the blue light appears on my dash when I pull in the left stalk) but the headlights don't actually flash unless my headlights are on.

Is this supposed to be this way?

Thanks in advance

Jamie.

[DiscoJeffster]

Hi,

Discovery 4 2013 HSE

Am I being silly or missing something blindingly obvious, but my flash only works when I have my headlights on. I've been casually 'flashing' people to let them through (the blue light appears on my dash when I pull in the left stalk) but the headlights don't actually flash unless my headlights are on.

Is this supposed to be this way?

Thanks in advance

Jamie.

Not how it’s supposed to be.

[JamieG]

OK,

my fault for not wording the question appropriately.

Does anybody know this fault and how to fix/resolve it?