Stupid Question...how Do I Turn Off The Horn Chirp When Locking Car?

[red2k7]

I just bought a 07 Mustang GT a few hours ago and it did not come with a owners manual. How do I make it so the horn doesnt chirp when locking or unlocking the car. For reasons unknown to me the previous owner thought it would be a good idea to turn this feature on. Please dont tell me to only hit the button once because I am. I used to have either a F350 or Explorer that did this when I bought it and I had to do something simple to disable it but I cant remember. Thanks for the help

 

[Az Pete]

This site has the manual on line.
http://www.motorcraftservice.com/vd...bs_serv_all_new&TYPE=OWNERGUIDE&menuIndex1=16