central locking, alarm fault

hi i have a 93,classic with central locking / alarm fault. I can activate locking this blows the fuse. If i unlock this blows the fuse.With the alarm relay disconnected central locking works lovely,reconnect fuse blows.Disconnect the central locking relay and the alarm works lovely as soon as both are connected the fuse blows have tried most things including every locking solinoid disconnected, still blows the fuse has anyone got any ideas please almost no hair or money left. many thanks se range

Looks like you answered it in the question. Sounds like the relay itself is goosed. They can attract condensation and burn out. Try another of the same type.

Is there any chance any of the connections have been transposed or does it just push into a bank of others?