How to disable Horn when locking/unlocking Car

I've just spend the past hour going throught threads on here and can't find a simple solution to this problem (if there even is one).

I don't have the smart key fob. I just have the normal key fob for a 2006 Prius.

When I turn the car off and lock the doors (either using the remote or using the door lock switch inside the door) the horn honks.

The horn also honks when I unlock the car using the remote.

How do you turn this off? It's annoying and my neighbors are complaining.

I don't want it to honk at me anymore when I lock or unlock the doors.

 

Yeah, it seems no one can say with certainty... I don't have an SKS model, so the latter isn't an option for me.

 

what is "John1701's site"?

 

Yes, standard key fob.

I bought the car used from a Honda Dealer who really didn't know much about Prius'.

When I look under the driver's dash down by the pedals, there appears to be a kill switch over ride button hiding under the floormat. There's a blinking LED on it as well. It's not secured to anything, so it looks like there may have been an after market alarm installed at one point, but I don't have a remote for it.

Would it be possible that is the cause of the horn to honk whenever I lock or unlock the doors using the factory key fob?

 

that's strange then.

i've installed after market alarms in the past and generally the horn honk would be tied into the alarm itself.

I can't find a head-end alarm unit anywhere in the car, so somehow they tied the actual wiring of the door locks into the horn because the car honks using not only the key fob, but also when in use the interior door locking button on the door itself.

If I'm sitting in the car, turn the car off, open the door and then press the door lock button on the inside of the door they horn honks as well.

So, if I make that assumption, does anyone know what wire would be tied into the horn to make this happen?