Jaguar XK8 central locking

hi,two days ago i tryed to set the the car alarm and lock the car but the alarm kept on sounding,i noticed the passenger side door central locking was not working so i had to lock the door from the inside to lock all the car and set the alarm.on unlocking the car the drivers side door central locking would flick in and out 4times befor the door would unlock now that as stoped working also,i now need to lock the car by the key,i then noticed the windows would not drop down the inch needed to shut the doors as on the xk8,i have tryed resetting the windows but no luck,i now found out the 10amp fuse in the security sender add blown and when i came to fit a new fuse that would blow also,guess this must be a short somewere,my questione is-could this be the couse of the central locking problem or is there something more to check as all othere fuses and relays seem to be ok,thanks