The headlights are not repairable. If an LED fails, its a new headlight.

The fact both yours have failed simultaneously makes me suspect the issue lies elsewhere

 

That's a good point. They are both dim by the exact same amount. Very strange indeed.
I'll look through the F-pace forum since they have similar headlights. Maybe whatever is feeding the high beams is faulty.

 

Depending on the year of manufacture bulbs may not be replaceable. I could not change the bulbs on the LED headlights on my 2017 Portfolio. The headlights are a sealed unit and I had to buy a new one (not cheap).

Im not an expert in any shape or form but both full beams not working may not be bulb related. Could it be a fuse or indicator stalk related?

It might be worth, basis the cost of replacement headlights, hooking the car up to a diagnostic tool to see what, if any, errors appear.

 

Good idea. I'll give that a try.

 

LEDs don't use that much power and I'd be very surprised if there's a separate power feed for 'high beam'. It's not just a wire going to a bulb but rather a change to the beam pattern. Far more likely there's a signal or even can-bus command to the light units. If that's not working, then the cause may be software or maybe the switch? In any case, it's not a DIY type task. You need the proper diagnostic computer to trace the signals and commands running around the place. Given the cost of the components I'd be getting it checked by a specialist with the right kit or else a dealer.

 

Do you have a code reader to check for codes?

Jim

 

No, but the independent shop I go to most likely does. I'll have them look at it.

 

You probably need to compare it with another car with the same headlights to see if you have a fault or not.

 

Easier said than done! These cars are rare.

 

Do the headlights flash, when you pull the indicator lever? I understand there is no reaction when low beams are already on? True? No dashboard indication of high beams on, true?
If there is no flashing with lights off, then the signal may not be transmitted from the switch. New indicator stalk then.

 

You can see the lights, and the dash shows correctly, but they are very weak. A handheld flashlight is brighter.

 

If this helps, when I swapped the Xenon headlights on mine for LEDs I made this video just to check if the AHB was still functioning correctly.

 

When you say LED, I am interpreting that as Matrix LED, not an LED bulb which afaik was never offered on a Jag?

Clearly if it's matrix then it's computer related as that controls which of the numerous bulbs are lit at any time to create the desired pattern.
Halogens have 2 filaments that they swap power between for low and high beam.
Xenons on the other hand have a mechanical flap that alters the beam pattern and the bulb is constant.

Clearly what system is in there has a massive effect on what may be wrong.

 

Have Jaguar ever fitted matrix LEDs? I don't think so. Mine are sealed LED headlight units but certainly not matrix.
Also, the headlights on my 2010 XF-S were Xenon but with a separate halogen high-beam (which I swapped for fan-cooled LEDs), not bi-xenon with the flap. I know that later models came with the bi-xenon system (including my 2015 XJ before I made the swap) and where the halogen high-beam had been became the LED indicator.

 

Did you manage to get your car on a suitable diagnostic machine to establish if there were any faults recorded?

 

No, not yet.

I will get it done when I take my car in to do the full service.
I'll update this thread when I do so.