how can i fix my central locking vauxhall vectra?

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