09'- Horn honks when locking and unlocking

Hi guys, brand new to the site!

I have been searching through a few threads, but I cant seem to find an answer to my problem.

I have a 09 Tacome Double Cab with TRD and I love it, but every time I lock or unlock the doors the horn honks, in addition to the normal chirping sound.

I have been reading a lot about the valet button and so on, but nothing seems to work. Im fine with the chirping sound, but the honking of the horn is just too much.

Any advice on how to disable the horn?

Thank!

 

Sounds like some kind of aftermarket alarm was installed...if you can't find it, maybe they removed it and kept the wiring in place to sound the horn with the keyfob functions as well as the beeps.