Interior LED Dome lights

Hi everyone,

A while ago, I got the original audi LED dome lights retrofitted (originally had the halogen version)
However, there is something that's still not right, see attached pictures:

If I press button A, then every led in the front and rear side goes on.
If I press button B, then the corresponding led (rear right side) doesn't light up.
However, if I press button C, then the corresponding light (left rear) does light up.

The cable that connects the rear to the front is an OEM cable (not custom made). I also tried another rear LED-unit but the problem wouldn't go away.
The main power cable is connected/pinned as shown on the pictures.

Though, after installation of the LED interior, I didn't do any coding. Is this perhaps needed? Because I could image that the system thinks there is only one ''button'' on the rear side (since the halogen version that I had only contained one button on the rear unit)

larbel said:

Is the rear LED module new or used? The button B on the rear module is broken perhaps?

Click to expand...

no, as i’ve already said, i tried another rear light device (the whole thing), but problem persists

rawrmcrawrrawr said:

Definitely an issue with wiring. There’s no coding involved for this retrofit. I assume you repinned and added a new 12v wire for the front dome light? And you installed a new wire harness running to the rear dome lights?

If you wired everything correctly, your front dome light unit could also be defective.


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Click to expand...

The wire harness running to the rear dome lights is bought new OEM
It is really weird, since the rear right light goes on when I push the central-everything-on button in the front, but the individual button doesn't work.
Could this still be related to the front unit? That's why I hoped someone with this working could make a picture of how the wiring in the plug is.