I wouldn't have thought it would have it's own fuse, it is such a low current it probably shares a fuse. Is everything else working ok? To check the switch unplug and remove it from the car. Using a multimeter on continuity, put across the terminals and push the button. Keep trying across all terminals. If no beep from any combination the switch is probably dead. If you do get a beep the next stop is to check the solenoid.