i have this alarm i had installed and after my friend hooked his laptop to my computer in my car the alarm hasn't worked since i unplugged it and plugged it in and it will not flash anything now if somebody have any quick suggestions it would be helpful

he charged his laptop through the cigarette lighter

or

he hooked up his comptuer to the PCM on your car

he charged it up through the lighter and hooked it up to the pcm

Check the fuse in the alarm. Make sure it didn't blow just off chance.

the lights and everything was working after until i unplugged it

Jsmoove, this post isn't performance related, and it'* not going to get the visibility you need in the performance forum. I'm moving it to the right place for you.

JS... the alarm was working, now it doesn't respond at all. First thing to check is if it has power. Fuses blow... sometimes there'* no logical explaination. If you are asking for help that'* the first and probably easiest thing to check. And without power, the alarm will do nothing.