I'm having an issue with the factory alarm. When I press the alarm button, the horn beeps but the lights won't flash. When I unlock the door, they flash.....as they should. I'm familiar with how to cycle through the modes (holding lock/unlock). I know that one mode flashes lights and horn when activated and lights only when disarming. The other mode basically silences everything on lock and unlock mode. I've owned plenty of Nissans and this is the first one I've had where the lights won't flash when the horn sounds.