Yesterday morning, about 6:30 a.m., I was sitting here reading e-mails, news, and weather on the Internet when a really LOUD AND CONTINOUS horn sounded. To say I was startled would be an understatement. My wife and the dog were still asleep, but they sure got up in a hurry. To make a long story short (well, shorter anyway), I traced the sound to my 2002 Ford Ranger in the garage. Both vehicles had been parked there, with the garage doors shut, for at least 15 hours. My keys and remote control were laying on the dresser in the bedroom. So I got the keys, tried pressing the security button on the remote and that made the lights flash, but didn't change the horn. I pressed it again and the lights quit flashing, but no change in the horn. I'm sure everyone is familiar with the security horn beeps, but this wasn't beeping; it was continuous. So I backed the little truck out of the garage so it would easier to open the hood, but when I backed out, I hit the horn button in the steering wheel a couple of times and the horn stopped; Thank Goodness. I talked to my service advisor at the Ford dealer and he'd never heard of such a thing either. The horn has worked normally ever since. Now the owners manual shows a horn relay fuse "unless equipped with a truck central security module". Mine is so equipped so apparently there is only a breaker in that module, and apparently something in that module caused the horn to engage for unknown reasons. This was something I never heard of, and I didn't ask what it would cost if that security module had to be replaced. But in the meantime, since everything seems normal, I'm keeping the right sized wrench handy in the truck to disconnect the battery if need be.:laughing:
