1996 ford fiesta Central locking and n/s/f electric window fault?

recently i noticed my central locking was unlocking itself once locked, as though it was jammed, then by pushing ht ehandle inside that didn't lock the doors either, on either side, but now buy pushing in the handle on the o/s/f it works but the central locking has stopped working on the n/s and now my electric n/s/f window has stopped working, the fuses are all ok, but there is nothing like the motor is trying to work, its just dead, could it be a broken wire, and if so where abouts. Any advice greatly appreciated!