I disconnected my battery to install some fog lights, and after I did this I entered the Radio Code and everything is fine. BUT, now there is a red blinking light on the dash when my car is shut down. I never noticed that before. I don't have a manual so I don't know what it is. The light is located just to the lower left of the trip reset button on the dash and only comes on when the car is off.
Thanks

 

alarm?