I have a 1995 vw Jetta and my mom went to move it she staled it out car alarm went off they didn't know what to do so they took the negative battery cable off the next day i drove the car and the car alarm go off when im driving it. I put the key in the door to stop the alarm start the car drive away in it will go off again.

Sounds like the alarm system is acting up to me... Unplug the negative terminal to your battery, wait 10 minutes and connect it back. For the best DIY care for you VW, get a Robert Bentley Manual for it.

Sounds like the battery or a short in the battery line. The VW alarm will come on if you disconnect the battery. Use a voltmeter (or mutlimeter) to check the battery voltage (red lead on positive pole; black on negative; range on 0-50V). When car is not running, you should see 12V; when car is running, you should see 15V (if the alternator is working). You can also test the battery charge by turning on the headlights. If they brighten when you rev the engine or if the dim when you turn on other electrical accesories, then it is likely the battery.

Most likely the "paddle" that attaches to the lock cylinder is broken

You must have left the truck tamper switch disconnected or damaged it.

Insert the key into the door lock on the driver side and move it to the unlock position two times quickly. That should turn off the alarm.

Connect the battery and press the button on the key fob. If that does not work, try starting the car.

nop but u should check the alarm. some cars when the battery its changed activate an silent alarm and doesnt let the car run

Have you checked the charge on the battery? How bout your connections at the terminals. Vw are very sensitve to voltage drops. You might even have something thats draining your battery

Reconnect starting with positive then negative.

the same thing happened to my 1996 jetta trek.

when the alarm went off on me and the car would not start i walked around to the passenger door, locked and unlocked it, therefore the alarm went off.

but the alarm only went off if the car battery was low and had trouble starting.