Fuse SBF no.1 What is it for?
 

SBF 1
I hope someone can tell me what this fuse is for. Its a 30A fuse in the engine bay fuse box. (93 WRX) I have a wiring diagram, but the page it refers to seems to be missing.
My battery is being drained in only a couple of hours unless I remove this fuse. I think it mught be for the central locking, but I'm not sure as I lost that function on the car ages ago.