Battery goes flat if left a few days

[newsh]

This is on the 3B
I think this might be down to the central locking pump not switching everything off, sometimes the interior lights don't go out when I lock the car .. Or possibly the ignition switch. Not sure..
Tested for current drain at battery terminal, seemed ok when car locked or left till timer cuts power but I think it's not consistant.

Battery is new.

There us no radio fitted.

Any thoughts chaps?

[caterpillar]

you does have the switch in the radiator( for the fan)... when the engine are going to bee cold, the switch connekt the fan, an the fan are going, even the car engine not running...
or, the alternator regulator are gone; so the current goes to earth..., or bad leads from the alternator, to the starter...the does have a really hot place...