[moneyforpeople]

Noticed this evening the below issue with my taillights:



I could not see for myself if the reverse lights, 3rd brake light or the left brake lights worked, but here is what I know stopped working:

Inner left and outer right LEDs
Inner left rear fog light
Right turn signal
Both license plate lights

The car is not displaying any warnings. Signaling right doesn't blink faster as would be expected when there is a malfunction.

Scanned for codes and there is the following code in the REM that seems relevant:
804814 Supply voltage to terminal 30L2 is missing

While I'm dusting off my copy of ISTA+ I was wondering if anybody had any leads.

Thanks in advance!

[Oksamit78]

I'd start by checking the Ground connection to each of the nonoperating light assemblies. All lights (turn, brake, parking, reverse and rear fog) in each light assembly use one common Ground wire. REM controls the +ve for each light function. If all functions do not work, the problem is either with a common Ground, or REM module has several issues. Start investigation at the light connector of each assembly and check continuity of the Ground (brown wire) to the car body.

[moneyforpeople]

Originally Posted by Oksamit78

I'd start by checking the Ground connection to each of the nonoperating light assemblies. All lights (turn, brake, parking, reverse and rear fog) in each light assembly use one common Ground wire. REM controls the +ve for each light function. If all functions do not work, the problem is either with a common Ground, or REM module has several issues. Start investigation at the light connector of each assembly and check continuity of the Ground (brown wire) to the car body.

Thanks for taking the time to reply!

Ended up looking into the code "804814 Supply voltage to terminal 30L2 is missing", which after looking at the ISTA test plan and wiring diagrams led me to find out fuse 161 was not inserted anymore.

I had removed it while troubleshooting a dashcam hardwire install, forgot to plug it back and forgot I had removed it in the first place... :facepalm:

[Oksamit78]

Glad to hear you worked it out.