1.8 Mondeo Zetec 2001 - Mad central locking - Boggy

Good to be back, even though my post from last week vanished! My central locking triggers itself (I know, a common Mondeo quirk, especially when cold) - doors will lock themselves at will when driving along, very annoying, where should I be looking for water ingress / electrical foibles?

1.8 Mondeo Zetec 2001 - Mad central locking - rtj70

Someone might have set it to autolock above 7mph? I did that to the Mondeo I had but turned it off before it went back to the lease company.