After buying my Prius III, the dealer installed a Karr alarm system which has a blue LED light underneath the steering wheel which blinks when it's armed and, if the alarm goes off, blinks once to three times to tell you what set off the alarm. Tonight I was at dinner and afterward entered my car using the SKS. When I started driving the car I noticed that the LED was blinking making me think my alarm had gone off. After the alarm was first installed, the installer showed me how to reset the LED by holding or clicking the button behind it (I didn't remember how exactly) so I tried pushing and holding the button but nothing worked and it kept blinking. I continued to drive home and all of a sudden my alarm started going off while I was driving. I pulled over, turned off the engine, and with the key fob locked and unlocked the car. I started driving again and would hear intermittent honks before the alarm went off again for 20 seconds before it stopped on its own. Finally when I got home I again turned off the engine, locked and unlocked the car, and the blinking LED finally went away. As I was walking around the car inspecting it to see if it had been hit to start all of this in the first place, the car beeped and locked itself automatically as if I held the door handle for the SKS or pushed the lock button on the key fob. I unlocked the car, tried to recreate it, and everything went back to normal. Sorry for the novel but tonight was crazy and I don't know what the heck happened. Does anyone have an idea or has anyone experienced something similar? I'm afraid of the alarm going off again while I drive.