Aftermarket Car alarm wont let car start!!?

Question

so i need to know how to disconnect my WHOLE alarm, the brain and black box is under the dash so what do i have to do?

Answer 1

first off you should post as much as you know about the car alarm itself to get a good answer as they are not all the same.  Also year, make, model  of the car would help a lot. You can try unplugging the main harness going into the "brain" which may or may not help you depending on how kill switch is wired.  Most are wired so that starter is disconnected when car is armed and the brain is controlling that so sometimes you can get around that by pulling main harness to the brain.  i assumed you tried using the remote to disarm the unit and if it didn't work you attempted to try a new battery to make battery didn't just go dead on remote.  will try to help more once you post more info  

Answer 2

There is one word in your question which assures you won't get any answer here that will do you any good.

"Aftermarket"