Weird electrical problem with telephone AND left turn signal (formerly weird telephone problem)

[AT.]

Hi all,

My problem became more stranger with my built in telephone module. For this reason I started a new thread, as the problem for sure not relies to telephony module, even the symtoms remained the same.

So this was the past:

The symptoms started from one day to another, my bluetooth doesn't wanted to work. The telephone modul told me to "please wait" and it was stuck on this screen, nothing happened after a long period. After several resets and some tricks, I was able to see, that the data connection is not working as it should be, and that caused the system to stop at this stage.

and what I didn't mentioned that time, that there was another electrical failure, the left turn signal on the boot lid became weak. It worked, but it had a very low light, it was almost dark, however, this failure also disappeared without any help.

It occured about a week ago, and everything worked fine untul yesterday.

At that time, I figured out, that these failures occured after a high pressure hand car wash, as I did it again. And the problem happened again, but not immediataly, and not in the same time.

So first, the telephone module does not responding to the MMI, and for today, after two days, the left turn signal became weak again, while the telephone modul still not works. In the meantime I figured out, that some vapor exists inside the light unit, os there should be a leakage somewhere, while I can't see any damage in there.

So, even I could understand that there is a problem with the light units housing, even this unit became damaged, how can it affect the telephone module?

I could really appreciate any idea what can I check to solve this mistery.

Thanks in advance for any idea!

[AT.]

Solved, even there is no sign of damage, but the housing's gasket became wrong, so I have to replace the inner tail unit with a goodwill.