Recieved two BOMM units from Jim and both did not work. Must say he gave me good customer service. He told me there is a small percentage that he has issues with. Refunded my monies promptly.
Did you power the mic by turning on the intercom? Mine didn't work after the install and I checked and rechecked the wiring and it was correct. I emailed Jim and he called me promptly. He told me I had to provide enough power to the mic by turning on the intercom and when I did, it worked. That wasn't in the instructions, however. Maybe most people know it but I didn't (the intercom power up is required if you use pins 33 & 22, which allows the passenger to also use the BOMM, not 9 & 20, which is front mic only).
By the way, this week I just installed the latest version of the BOMM and recorded voice mails on my answering machine from my new BOMM on my CUSE5 and the older BOMM version on my CUSE4, using the same Zumo 660 & Blackberry phone. The new model mic volume is louder than the old. Haven't tested it while riding yet, too much snow here.