The central locking on my mates Barchetta was throwing a wobbly. The key would lock both sides from the passenger door but only the drivers door from the drivers side.
That sounded like a switch problem to me so I popped the central locking units out and tested them with a meter. Sure enough the driver’s side was switching in one direction but not the other.
I stripped the unit down and found the offending microswitch. It turned out to be a standard item available for a couple of quid from maplins. So one switch and a soldering iron later and the central locking was as good as new.
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