I have an 89 maxima....everything was doing real good until i had an accident, and i'm slowly starting to fix it agan but the problem is that after the accident my alarm just stopped working.
The door locks ok and the security light starts blinking, but when I leave the windows down and lock the door and after a while open the door the alarm does not sound.
If anyone can please help me...i would appreciate it...

 

Are you sure your locks are ok? Cause my drivers side lock is broke and if I unlock it from the inside of the drivers door it won't go off but if I do it from the passenger side it does work. that might be it but probably not

 

I'm sure the locks in all the doors are ok...I checked and tried all of them and the alarm still won't work...thanks for the suggestion...

 

Check your door pin switch and make sure you are getting a reading at your security box under the driver dash. Should read 12v with the switch closed and 0.0v with it open. Check that and maybe you will find some answers.
Good Luck