Hi guys, after a couple of little recent untimely, parking sensor type beeps, I have travelled 30 miles today, with the worst possible, continuous, high pitched noise, for approx. the time the brake pedal has been depressed. Don't want to get back in it!! Any ideas.....please help.

What component causes the annoying beep when opening door while key is still in ignition, the annoying beep when driving without seat belt etc.?
I think it must be either something in the driver side door because I recently removed that.
Or it could be the front speakers, because I lost the beep (good riddance.. kinda) after attaching an amplifier with hi-lo converter to the rear speakers. So the front signal is unused at the moment.