Horn blowing 2003 Vitara came home went into house, heard this noise it was my horn blowing, sat in the drivers seat, it stopped, got out, shut the door, got to the house, it started again, disconnected fuse, next morning put fuse back in, all was quiet, the next morning my daughter opened door, horn started blowing, sounded weak, stopped, pulled wire to disconnect horn. ???? This truck has been a jem, it is a soft top three door.

Probably open fuses. That was the "pop" you heard.

Actuator doors or control unit

It happens a lot for the Tiburon apparently....what you have to do is put the key in the ignition whilst the horn is going nuts, turn the key to the "on" position and wait a minute or so for the horn to stop blowing. Then press the "unlock" button on the fob until you see the turn signals flash. try turning the key over and see if it will start up. If it doesn't, try again, same thing only turn the key all the way off and try starting as normal again. I can't remember if it's the "unlock" or "lock" button you're supposed to press, but one of them does it. Test it while in the car and see if it locks when you hit lock on the fob.....oh, and also make sure all the doors are shut while you are doing this. It recalibrates the fob to the car's computer and resets your security system and keyless entry.

keycode for a ford 5000 rds s/n m452049 please

you have got corroded/open circuit wiring to the gem module more than likely behind the front bumper liner or over the wheelarch liner area lh viewed sat facing forward

I know a quick fix to get it started but you might think i'm crazy to do this:

My 2003 Dodge ram van 1500 does the same thing. I put a small heater on the driver's side floor blowing the hot air toward the door.
I plug in the heater when I get home from workand let it run all night.
The computer for the alarm is under a kick plate near the driver's door next to the driver's seat on the left side. Once it warms up the alarm; it will shut off the alarm and you can start the motor.

Horns have constant power all the time so when you press the horn button, all you are doing is grounding the circuit and that makes the horn blow. Usually what happens is that a spring breaks underneath where the horn button is or something allows the horn button to ground out somewhere, possibly even through the inside of the steering column.

its likely your fuel pump

I think your horn relay is making contact from behind your horn buttons on your steering wheel. Usually as time creeps up the insulation that is placed on the positive lead for the horn gets worn out from constant horn action. If it is worn down the horn is touching a ground and completing the circuit and thus making the horn sound. I would start with that first before getting more technical. Let me know. Gabe

sounds like a piece of frozen ice caused by the fan blowing cold air and it froze up in housing ??how cold was it ??