I have a 53 plate Vectra C which has been owned since new and has now covered 50500 miles, last weel the central locking system packed - up. When the remote unit is operated all doors try to lock but then imediately unlock and on the dash it shows drivers door open, this also happens if the key is use in any lock. As a temporary mesure a local garage has disconnected the electrics to the drivers door so that nothing electrical works on that door but I can now lock/unlock all the three other doors with the remote and lock the drivers door using the key. The local garage has suggested the problem is likely to be the door motor drive unit and has also suggested that a Vauxhall dealer will have to repair it and that a new motor unit could cost around £200 plus fitting.

If the door tries t