Car Alarms: Keyless entry horn stopped blowing, toyota rav 4, 2000 toyota rav 4

Question
I had a keyless entry installed on my 2000 Toyota Rav 4 about 2 years ago. When I lock the doors with the remote, the horn would blow 1 time and unlock, 2 beeps. All of a sudden, it stopped blowing at when you lock and unlock about a month ago. My horn works fine but not with the keyless entry. Any idea why it stopped?

Answer
It could be anything from a misconnected wire at the horn,
to a fuse or relay inline that has popped.

I suggest an inspection of all fusable wires
on the aftermarket system to check my theory.

Let me know what you come up with.

I am leaning towards a bad connection.

Robert Martin
ALARMTEK
ALARMTEK.net