My 1992 Previa has developed a very annoying problem: The alarm occasionally just goes off for no reason. I'm pretty sure it's a factory original alarm, not an add-on. It's parked in my driveway, and suddenly the horn starts honking and honking, and I need to run out and unlock the door to stop it. At first, these incidents were widely separated, but lately, they've been getting more common. I need some advice: Can I just disable the alarm? I'd rather not spent a bunch of money to fix it.