Lost DRL on offside LED headlight

[mrharrod]

Hello Peeps!

The DLR leds do not come on but low/high beams work fine on passenger side.
Driver side is fine (both DLR and beams are good.
No dash warnings.

I get this error on ODB scan (OBDEleven)

Engine: CXEB 150 kW (204 hp) 2.0l
    Mileage: 15580 km

---------------------------------------------------------------
09 Central Electrics
        System description: BCM PQ25 Max4
        Software number: 7E0937090C
        Software version: 0752
        Hardware number: 7E0937090C
        Hardware version: H82
      
        Faults:
                02745 - Left daytime running lamp bulb
                static
                    priority -  3
                frequencyCounter - 19
                drivingCycle - 204
                km-Mileage - 15589 km

On the headlight, I see two ballasts/modules.
Top one is Part number 7PP941571AE. Does that control the DLR lights too? or at least provide power?
No idea what the bottom module is for? (would have to remove the bumper to get to it I feel

Thanks,
Chris.

 

[Sackmycook]

H4's or H7's or LED oem or aftermarket?

 

[mrharrod]

H4's or H7's or LED oem or aftermarket?

Hey Sackmycook, LED OEM for sure and car out of warranty

 

[Robert]

On the headlight, I see two ballasts/modules.
Top one is Part number 7PP941571AE. Does that control the DLR lights too? or at least provide power?

7PP941571AE is for low/high beam only.
The other power module (4G0907697G) is for side/DRL lights.
You need to verify if your problem is faulty power module or the actual set of LEDs.
I would suggest to swap 4G0907697G from the other side and then you know 100% what has failed.
Front bumper off is a must.

 

[mrharrod]

Ah perfect! Now I know need to remove bumper for sure and will test like you suggest. Thanks very much. Will do this when sun and heat come together one day

 

[Greybeard]

Ah perfect! Now I know need to remove bumper for sure and will test like you suggest. Thanks very much. Will do this when sun and heat come together one day

Hi @mrharrod
Hoping the sun and heat have subsequently aligned.
Did you find a resolution to this?
I have just discovered the same issue.
Thanks
Andy

 

[mrharrod]

Hello mate, Yes I followed the bumper removal guide

(

)

Swapped the DLR ballast from headlight unit (There are two, one is for headlight and the other is DLR) with the Drivers side DLR ballast to confirm bad passenger side DLR ballast first.

This was the part I needed to replace the faulty DLR ballast (4G0.907.697.G Delphi 28548011 DLR light module).
check the label for your ballast to confirm that same or not).

Ordered replacement DLR module ballast from https://www.hids-direct.co.uk/
Installed new ballast and it worked!
Reinstalled bumper. Happy days. No ECU reset or anything like that needed (for me anyway).

 

[mrharrod]

The ballasts are attached to each headlight unit (hence bumper has to come off to remove headlight unit and access to DLR ballast).

 

[Greybeard]

Hello mate, Yes I followed the bumper removal guide

(

)

Swapped the DLR ballast from headlight unit (There are two, one is for headlight and the other is DLR) with the Drivers side DLR ballast to confirm bad passenger side DLR ballast first.

This was the part I needed to replace the faulty DLR ballast (4G0.907.697.G Delphi 28548011 DLR light module).

check the label for your ballast to confirm that same or not).

Ordered replacement DLR module ballast from https://www.hids-direct.co.uk/
Installed new ballast and it worked!
Reinstalled bumper. Happy days. No ECU reset or anything like that needed (for me anyway).

View attachment 229482View attachment 229483

Wow @mrharrod . Thank you so much for your prompt, informative replies to an old post.
Very much appreciated by an old member!
Andy

 

[MB12]

Does anyone know if the T6 Caravelle with halogen lights still has a DLR module ballast or is it only fitted with LED lights?

 

[Robert]

H4 and H7 headlamp bulbs are fed directly from the BCM.
Ballast is a reference to a "power supply module" on a High-Intensity Discharge (HID) lights, aka Xenon lights.

 

[MB12]

Thanks Robert. I've got the 02745 fault code with message: -
Bulb for Daytime Running Light; Left
010 - Open or Short to Plus
A google search for that fault code led me to this thread. The bulb is fine but I'm only getting about 0.7V at the connector. Do you know if the side lights are fed directly from the BCM too?

 

[Robert]

Yes, all light bulbs are fed directly from the BCM including side lights.
Did you try to clear the fault code?
Alternatively, disconnecting the main battery should reset the BCM and effectively re-enable missing side light output.

 

[MB12]

Yes, all light bulbs are fed directly from the BCM including side lights.
Did you try to clear the fault code?
Alternatively, disconnecting the main battery should reset the BCM and effectively re-enable missing side light output.

Thank you Robert. We did disconnect the battery and that hasn't worked but I didn't clear the fault code yet so I'll try that.

 

[Scottish Scrutineer]

Does anyone know if the T6 Caravelle with halogen lights still has a DLR module ballast or is it only fitted with LED lights?

It could be the common fault of the DRL connector burnt out. Caravelle has H7 units and the bulb holder was upgraded following many failures. Easy way to identify is check if there are wires attached to the bulb holder. The original does not and picks up the feed from the headlight housing.

H7 Headlamp - W21W DRL Bulb Issue. Be Aware

I'd been having an intermittent fault with the off side DRL for a while. As soon as I put my fingers on the bulb holder, it would turn back on for a short time. However, eventually it packed up altogether. So I removed it and discovered this.... The contacts were blackened and the plastic...

www.t6forum.com

Electrical small job

Hi, Posted in another thread, tell me if this is naive or against forum rules please. Looking for someone to perform the soldering fix on a DRL lamp holder. There appears to be a thread whereby someone has bypassed/ soldered some wires to offset the issue of a dodgy lamp holder causing bulb...

www.t6forum.com

 

[MB12]

Unfortunately clearing the fault code didn't work but the DRL bulb holder burning out is next on the list. Many thanks all.