i have a vauxhall vectra 1996 1.6 ls . my central locking dose not work on the passenger door and rear passenger side ? i have replaced the door switchs but the problem remains !! it drives me mad because the rest of the system work well . please help if you have any ideas . thank you .

steven h, May 2010

Try using a power probe or multimeter (power probe would be the preferred tool) for open and unlock signals at the passenger door motors, if you get all the live/earths and open lock signals at the motor plug then its the motor, if not move on to the multiplug at the door pillar same checks again if thats ok its probably the wiring in the door, if still no signals same tests again and work back to the ECU, remember to check the harness junction points at the passenger footwell behind the plastic trim that sometimes gets damp and corroded or kicked loose after a while.

Spannermonkey, May 2010