Skoda Octavia VRS MK III (2019), rear fog light not working, below has been checked:

1. All wiring 

2. Bulbs function tested 

3. Comms between switch and BCM

 

Any other suggestions before the unwanted trip to Skoda?

 

Are BCM's re-programable for the MK3 Octavia? Or single vehicle ID use?

 

Thanks 

I'd be surprised it the BCM was faulty... Just to point out, stock cars only have a single fog on the drivers side so don't expect both sides to work.

 

What's the vehicle history?

Is it new to you or have you had it from new?

Has you ever known the rear fog lamp to work?

Can you confirm how you've performed the tests so far?

 

I can only assume it's about to go through it's first MOT...

 

A VCDS autoscan and ideally an adaption map from 09 would help

Edited 27 July, 20223 yr by langers2k

Langers2K thanks for your reply, 

 

Yes was aware it was just the drivers side, a guy came over and did the testing as he had the proper kit. I'm limited to a can of WD40 and two sizes of hammer. 

 

Vehicle had one owner previously - the car was bought by me last year and i've done circa 15k miles - no issues good motor 

It has the black panther kit on it and there was a receipt for a new 

Never known the lamp to work, and used when been driving but obviously not seen it working, no alerts on the dash of bulb out etc 

The local garage did the MOT and failed on the rear fog, but they did not have diagnostics kit to work for the Skoda. 

Tests were as the guy mentioned - so as above checking cables and comms to BCM and away from it, seems the BCM is the issue 

 

 

Any simpleton checks I can do? 

 

Thanks 

 

I think I would maybe check with VCDS (or similar) to see if it’s been deactivated for some bizarre reason. Maybe both were activated by the previous owner then hastily and incorrectly deactivated prior to selling. I dunno. It’s the lack of warning that’s making me think that. 

 

SC03OTT, 

 

Thanks for your reply, I will check that out and it makes sense as the garage said their VCDS wasn't reading that fog lights were even on the car, so maybe they have been deactivated, 

 

Cheers 

I don't think there is much simpleton stuff I'm afraid. Cars are just computers these days and tend to need another computer to find out what's happening

 

As the garage has VCDS, you could ask them for an adaption map from 09. That will contain all the lighting configuration so we can take a look and flag up anything that's obviously incorrect.

 

As mentioned above, the lack of warning is somewhat suspect so I wouldn't be surprised if the fog has been accidentally disabled.

 

Just to check, if you have a towbar I assume there is nothing in the electrics socket...?