cageukred

Hi Guys can any of you help out I have an L322 2008 TDV8 ,the problem is an intermitent fault with the central locking on the front doors mirrors and sun roof and windows front only we have changed the bcu and tried to run separate wires but to know success ,unfortunatley the car is now out of warranty and we think the maybe the problem is the wiring harness but as I said it is an itermitent fault as anybody come across this before