96RUSTANG

i have the stock alarm in my gt.. i gues thats what you would call it.. anyway up untill yesterday, when i locked or unlocked my mustang .. it wouldnt beep or make any noise (unless i hit lock twice).... the daytime lights would simply just blink.. i also was able to lock my doors from the inside and just shut it.. now all of a sudden when i use the keyless entry to unlock or lock my doors it does 3 rapid honks.. however, if i lock it from the inside and then try shutting it, the alarm will automatically go off.. anyone know what this could be? any help is appreciated. thanks!