Montero Alarm Ques
 

2000 Montero Sport.
Horn will not stop. I have disarmed the factory alarm using the remote, except once I turn the ignition the horn sound constantly. If I remove the fuse it stops and car runs fine. My car battery cables were loose- had to reset the car stereo code. Could the horn need some sort of reset as well? I tried the remote, as well as the suggestion in the manual of holding one remote key then pressing the other and releasing both. No luck.
Any suggestions so I don't have to drive around with a horn.
Thanks