I have spent all morning trying to find the problem
if you take the key out of the car and turn the lights on all the dash lights up and so does the headunit but you cant turn it on because the key is not in.
the head unit lights up when you turn it on anyway.
This is the only thing which i can think could be causing the buzzing sound,
is there a way to stop the head unit lighting up when i turn the lights on??
This is probably a question for Mike
