Doors lock/unlock while driving?

[sparker]

Hi Guys,

this just started happening the other night, I got into my boxster and drove off. I noticed the doors tried to lock and unlock by themselves and then the red central locking light came on, even though the doors were not locked.

Now the light isn't on anymore (can still operate the switch as per normal) but my doors do seem to lock/unlock while driving (although the light doesn't come on when it does it itself, only if I press the button).

I have searched for this problem and found a few threads, but no solutions! Any idea's on where to look? I have taken the switch out and it all looks fine? Next place to look/measure?

Regards,
Sam