I am having trouble with my 2000 jetta. Sometimes it will unlock perfectly, and it will unlock all 4 doors and the other times it won't unlock any door except the driver door. Also same problem with locking, it will sometimes lock all 4 sometimes only driver door. Also sometimes when you unlock the door and only the driver door unlocks the car alarm stays on and if you try to turn the car on the alarm goes off.
I'm thinking maybe the relay is bad? Maybe a fuse? So I wanna see if you guys have any ideas before I go and start checking everything out.