Thanks for all replies. A further update, checked out all door gaiters plus boot gaiter no breaks in the wires. Disconnected the Central locking ECU under passenger seat buzzing noise still coming from passenger window when button pressed. Done what SilverBeast said in his last post and water is running out of hose when disconnected from rear wiper motor so the motor must be broke and not pushing water out. What can I try next? I have a video of the noise the window makes when I press the button if that would be any use?