My 2009 Tuareg Compresor did not start when I turned it on, I felt it was fuse but can't really find the fuse box location

What is your question?

It only happen when my technician work on my brake master, that all I can recall

What makes this problem better or worse?

It's does not work wether hot or cold

How long has your 2009 Volkswagen Touareg had this problem?

One week ago