6R Rear lights, side lights and interior lights not working

[Marthool]

Hi Just an update on where I am at
I have had the car on a diagnostic reader which initially came up with 11 faults!! This was probably down to what I had disconnected and reconnected, once these had been reset only 1 fault code remained with only the light bulb illuminated on the dashboard.
The code is 03435 - Terminal 30 for interior light and Parking light Open Circuit.
I looked through other forums for this and a relay was mentioned ‘645’ part number 4HO951253A which I have replaced but still no lights
Will the car have to go back on the diagnostic device or is there something else I can check beforehand (don’t want to pay again if I need to check something else first!)

[iichel]

could you please have a look at fuse number 21, and check if it is receiving 12v? you can check the 'face' of the fuse with a multimeter. or remove it and measure the connector.

[Marthool]

Just checked the fuse and it is ok, there is also 12v at the fuse terminal

[iichel]

and i read you already checked / replaced the fuse?

[Marthool]

Yes, I have checked a few times just to be sure!!! (Hoping for a different outcome!! )

[iichel]

yeah... it's really strange. i'm thinking perhaps defective BCM. that's the only thing that would make sense to me.

[Marthool]

Is there a way to check it? In the car or out of the car?
Would I have to just get a replacement to try it?
Would it be a straight swap? Would the part numbers have to match?
I have had the BCM out and taken it apart to look for signs of damage / burnt parts but it all looked ok

Thanks for taking the time to reply

[iichel]

well, basically what is happening, bcm says 'i got no power from fuse 21' and fuse 21 is fine, and i believe you also measured the input at a66, then my conclusion will be that something inside the bcm is broken. there is no way to check that, other than checking everything else.

[Marthool]

Hello, I have now changed the BCM and the lights all now work!!!
The only issue I have now is trying to recode the key fobs on the new BCM, when I go into the adaptation option and change the number to 1 or 2, press test the press the unlock buttons nothing happens and the test and save options are greyed out. Is there something I’m missing?

Thanks
Martin

[iichel]

Do not use 1 or 2, but 0

http://wiki.ross-tech.com/wiki/index.ph ... l_Matching

[Marthool]

Finally did it!!!! All sorted now For some reason when I pressed test then held the open button for a few seconds then pressed save it didn’t work but when I held the button in and kept it pressed while pressing save it worked
Huge thank you to ‘iichel’ and ‘ciclo’ for your help, support (and patience!)