Hoople, I can relate, I really wanted mine to chirp too. It was really hard for me to let it go until I knew for sure that mine unit would not chirp. I had that thing off & on a half dozen times to compare. It's just hard to see the lights blink in the bright sunlight sometims so I like the audible chirp. :s BTW, my bike still has no chirp. LOLHow I understand it is,,, the unit without the antenna does not chirp. I may be wrong and don't understand it but see Joy's link. It seems to indicate you need the antenna model (?)
Man, you must really want that "Chirp"
For that code 31 to come back again, sure does not look good. I would have guessed the new siren would have gotten you straightened out. Your "paying you dues" on this one for sure.
he said 02 models were trouble