it's been a while.... driver's side speakers

Yes, it has been a while since i was last on here with a little niggle but alas, I must return!

Basically, all the speakers - driver's door, passenger behind driver door and boot on driver's side have stopped working. I did a forum search with this thread coming up:

http://www.briskoda.net/forums/topic/220603-whole-driver-side-speakers-not-working/

but no conclusion. So as before, I will write a conclusion once i find one to help others.

Anyway, before i pull off the driver's side door carrier system (again! :(), i thought i would ask here if there was anything i could try before this.

All fuses have been checked and are fine. And no i haven't adjusted the stereo balance.

Does it sound like a wire has become disconnected from behind the driver's door?

OR,

Could it perhaps be a little prong in one of the big wiring system terminals (such as where the electric window switch is) has been bent and isn't making contact?

I find it nigh on impossible to work out wiring diagrams but do have a haynes manual. anyone who could tell me where to look in the manual for which wiring joint, i would appreciate it.