new hd installed, alarm not working

well I installed my new Alpine 7977 deck and first the LED attached to my Alpine alarm would go on when I opened the door. This started as soon as I unplugged my old head unit.

Now it doesn’t even beep, only the doors lock, and the LED only comes on [does not flash] when I open the door. It doesn’t come on [and flash] when I lock/arm it. I’m taking it to car toys tomorrow, but any suggestions until then?