How do i disconnect the alarm on a 2003 altima 2.5s it goes off for no reason and opens the driver and passnger windows

SOURCE: passnger side windows and all door locks do not work

Turn the intermittent wiper dial to middle setting. There should be an arrow on the ring that turns. Just turn it to the middle, then turn your ignition key on but do not start the vehicle. Turn the key off and then the locks and windows should work. This resets some kind of solenoid. I have had the same problem with my 98 accord from time to time.

SOURCE: 2003 nissan altima left side

Faulty switch. Replace it.

SOURCE: the alarm/horn goes off occassionally

Here is a link: http://www.ehow.com/video_4997501_disable-car-alarm.html I would also consider finding out why it is going off randomly. This should not happen. Hope this Helps!

SOURCE: How to disconnect the alarm

Depending if it is a aftermarket or a factory alarm, they should all have fuses that can be removed. By removing the fuse, you may lose your keyless entry option. Most aftermarket alarms have a siren that is usually mounted under the hood in the engine compartment area. I've seen where people have cut the wire going to the siren to disable it but keep the power going to the alarm system to keep the keyless entry still functional if it came with the alarm system.
Factory alarms usually use the existing horn for the alarm. If that is the case, you might need someone who is experienced to disable the circuit so that the horn will not sound if alarm goes off but the horn will still be functional when needed. Hope this helps.

SOURCE: alarm keeps going off when I open the drivers door

Make sure you unlock your door with the remote before getting in. Often times, they are automatically armed.