After a few weeks working on this issue with our member "joyflyin" about why she had no chirp on a recent installation of the optional siren in her alarm system in her 05 Deuce, there's finally an answer to the mystery.

There are TWO sirens available for the HD security system and
the part numbers are the same except for the last 2 digits.
The smart siren II is the one that does have an audible chirp when setting and disarming the system, while the smart siren does not.

After the installation, it may take a while before the sirens internal battery gets a charge from the bikes battery system.

68328-02 (doesn't chirp)
http://i149.photobucket.com/albums/s45/bills985/68328-02smartsiren.jpg


68328-06 (smart siren II does chirp).
Another difference is that the smart siren II will have the antenna on it.
http://i149.photobucket.com/albums/s45/bills985/68328-06smartsirenII.jpg

I have the chirping siren and it goes off when disconnecting the battery. I have been told you can disconnect it quietly by pulling the maxi-fuse right after turning off the key.

I have not done it because it the H-D battery charger lead fits my Schumacher battery tender.

I believe you have 30 seconds to do it your way or you can leave the key ON and disconnect the maxi fuse then to avoid alarm soundings.

Power Disconnects With Security System - Harley Davidson Community (http://www.hdtalking.com/diagnostics_alarms_security_and_fuel_injection_rel ated/1328-power_disconnects_with_security_system.html)

Thanks a million Glider. I'm glad I'm not the only one who can just accept things without knowing 'why'.....Persistence pays off & we all get a little smarter down the road.:D

Any time Joy. I always say the mind works better if you challenge it.

Glad it turned out OK.