Interior lights not working - where are the fuses ??

[uklee]

Got an odd issue - my interior lights ( i.e both central map lamps , passenger glove compartment , rear passenger roof lamps and both sunvisor lamps ) are not working
I noticed whilst i was away on holiday , and *think* that it may have been like this since i collected the car from its first service at the dealers the other week - although that statement may be complete tosh and it's just a coincidence. A couple of months ago , I changed all the bulbs for LED ones and the had been working great ever since

My foot-well lamps , load space lamps , and door puddle lamps are all working fine ( all LED also) .

I suspect a fuse , but cant find any reference to fuses for these lamps in RW1's sticky on fuses and their locations ?

In anycase , i have already pulled every single fuse from the drives side interior fuse panel and checked them for continuity with a multimeter , and they're all OK.

Any idea's ? Is this circuit fused ? , Mines a 14MY car built in May 2013

Lee

[uklee]

Well thats a bit odd

I did a fault code read with VCDS and found some reported problems >

Address 09: Cent. Elect. (J519) Labels: 1K0-937-08x-09.clb
Part No SW: 5K0 937 087 AB HW: 5K0 937 087 AB
Component: BCM PQ35 H 122 0173
Revision: BE122001
Coding: 48180A3BE837E100400800C0710049E44BF50B88736D8520648000000040
Shop #: WSC 00020 790 12345
VCID: 75E10EB3DCB870B6B81-8020

Subsystem 1 - Part No SW: 1K8 955 119 G HW: 1K8 955 119 G
Component: Wischer 16041 10 0603
Coding: 009795

Subsystem 2 - Part No: 1K0 955 559 AH Labels: 1K0-955-559-AG.CLB
Component: RLS 120513 05 54 0403
Coding: 0630ED

Subsystem 3 - Part No: 1K8 951 171
Component: DWA-Sensor 00 001 0104
Coding: 000000

Subsystem 4 - Part No: 1K0 951 605 C
Component: LIN BACKUP HO H05 1501
Coding: 000000

6 Faults Found:
00059 - Terminal 30 for Interior Lighting
011 - Open Circuit - Intermittent
Freeze Frame:
Fault Status: 00101011
Fault Priority: 1
Fault Frequency: 1
Reset counter: 60
Mileage: 12179 km
Time Indication: 0
Date: 2014.14.00
Time: 14:03:05

Freeze Frame:
Term 15 Off
Voltage: 12.30 V
OFF
OFF
OFF
OFF
OFF

00059 - Terminal 30 for Interior Lighting
007 - Short to Ground
Freeze Frame:
Fault Status: 01100111
Fault Priority: 5
Fault Frequency: 8
Reset counter: 7
Mileage: 9848 km
Time Indication: 0
Date: 2013.14.13
Time: 12:05:46

Freeze Frame:
Term 15 On
Voltage: 13.85 V
ON
ON
OFF
OFF
OFF

I then did nothing more than clear the DTC's and my interior lights started working again !!?? After clearing the codes a re-scan , came up blank - with everything OK .

So , what (or where) is terminal 30 ? and what happened here ?

Lee

[shshivji]

Sounds like the control module has shut the lights down due to a short circuit, I would make sure the interior led's are ok before you end up frying the control module.

Shak

[uklee]

Turns out it was the LED bulb for the passenger vanity mirror. Its a festoon type with an alloy heatsink on the back.
The alloy heatsink is quite wide and sits VERY close to the negative terminal strip of the bulb holder - I'm assuming that it touched at some point and earthed out , causing the LED to fail and the CECM to shut the circuit off when it sensed the short to ground.

I've manipulated the terminal strip away from the replacement bulb and put a bit of insulation tape on there too - just in case. I've done the side with the drivers side vanity lamp too.
For anyone else running LED's in these lamps - it's probably a good idea to pop them out and check them over - most festoon type LED's incorporate a heatsink on the back and there really inst very much room in there.

I'm still surprised that there's no physical fuse for this circuit ? - A 'virtual' fuse in the control module is all very well and good - but what a pain in the arse to have to call on the dealer to reset the module for the sake of a dodgy bulb if you dont have easy access to Vag-Com

Lee

[Rob_uk79]

Hi There,

i have the same fault, I have ordered a new light kit. Can I reset the code without software or CPU device?

Cheers

[Sebastian]

Anyone can help here. i checked my fuse no problem at all. what i can check next?