Central Locking
 

Cars been laid up for a couple of years but I charge the battery and start it up regularly. The last time I did this the central locking started to lock and unlock for a few times, stop, then start the sequence again. I have had to remove the fuse but this stops other things working too.
Any ideas why the central locking should do this please?

ps I have tried to remove the connector from the CL ecu but cant get the damn thing out.