Door central locking problem

[4535jacks]

For a while now, I've had a problem with the central locking locking but not unlocking. Now the button under the door mirror on the drivers side is also intermittent. I've swapped over the relays (2 yellow ones under the dash) and the problem persists. Now I've noticed that there is a problem with the courtesy light and central locking button on the bottom of the door sill.
When i depressed the long grey button on the passenger side, the central locking makes a noise, but when i depress the long grey button the drivers side, nothing at all.
Firstly, should the central locking make a noise when these button are depressed?
Secondly, could this be causing the central locking and intermittent door opening problems?
Finally, what course of action should I take to rectify these problems?#

Thanks in advance
Gary

[paulathome]

Hi Gary,
Yes the relays should click when the sill buttons are depressed.
These buttons are subjected to lots of moisture and are pretty cheap and cheerful and are available for a couple of quid each and are worth replacing for a start.
It may also be worth disconnecting the battery for 10 to 15 seconds and then reconnecting smartly which can cure a multitude of alarm faults.
The door lock mechanism is accessed via the flap behind and to the side of each seat, it might be worth squirting a little WD40 around the area to see what happens.
Try the battery first and see what happens.
Cheers.
Paul.

[4535jacks]

Thanks, I will try that next.
If that doesn't work, since I know the relays are fine, could the problem only possibly be the button itself? Is the button the only component that comes before the relays in the circuit?