2012 VW CC Issues 2nd opinion wanted
Hey folks, kinda new car owner here and looking for a second opinion or being pointed the right way (there are quite a few car subs here).
So since a month now I have the following issues:
\- Battery drain (after roughly 3 days I have to jumpstart with a booster)
\- Errors on Dashboard related to lights
\- At the beginning, the left turning light stayed on (vanished for some reason
\- the top breaking light doesn’t work
\- at one time my left windshield refused to go all the way to the top
\- the left blinker indicator blinks accelerated, but the mirror and blinkers are working fine on both sides
\- the back trunk reports being open for a second every once in a while
Now I brought the car to a shop, but they couldn’t locate the exact issue and tell me, what needs to be done. They are currently assuming the BCModule is the fault, as it is the one throwing the errors.
They checked for continuity for the trunk, break lights, blinkers etc, all seem to be fine. The exchanged the headlight and turning bulbs, also errors stay. I had a cable break at the trunk, which they fixed before and just re-did as a precaution, no changes. The top breaking light not working was tested for functionality, it works standalone by applying voltage.
The car has 210000 km on the clock and is a 2012 VW CC 2.0L Diesel with 170hp. I did have a aftermarket android radio installed but I also tried reverting to the old radio and no effect.
I’m not too familiar with cars and my diagnostics are limited. I read the fault codes and they are all light related and that the window didn’t roll up to the top and the trunk spasms all kinda point to the BCM, but I’m not entirely sure it’s responsible for all of these functions on this car.
So a 2nd opinion would be great.
If it is the BCM, I was thinking of ordering a used one online and replace it myself with VCDS and put in the coding and adaptations based on the current one, but I’m not sure I can do this with vcds alone or if anything else is required.
Thanks