93 lhs alarm

I just got this car as a trade/gift from my dad. i drove it from florida to north carolina with no problems. Immediately after i got here the alarm kept going off. horn was honking, lights flashing, and a ride light on the center console was flashing. i unplugged the battery and ended up taking out the fuse of the horn so i could try and figure it out with no noise. I'm probably the biggest rookie when it comes to cars so im pretty lost. here's what i've tried. i've read on this site that some1 cut a light greenwire with an orange stripe and grounded it. i tried that and failed. i've tried putting key n door and turning left right left right. nothing. any help?usmc

it's an aftermarket alarm.A DMM is a beautiful thing.

MECP Advanced Installer Certified.

how can i find out what i need to do to take the alarm off? and how to locate it at that.usmc