Been having probs with battery draining for ages,too long a story to repeat. Trying things myself at the moment. I have got to the alarm and found the siren still works (never heard alarm sound). But i can not get the buttons in the door to light.The manual says they should light to indicate on/of. Can anyone give details,should they stay lit or go out after a while? Also can you pull a fuse to disable the alarm at all?