I Also have a Motorola CDM1550-LS Model AAM25RKF9DU5AN that has a password on it that i have bought on ebay. I'm in need of a codeplug or some to help me. Thanks
The information you seek has been here for nearly a year. A quick search and you would have found:
http://forums.radioreference.com/motorola-forum/305060-cps-6-12-09-a.html
There are also detailed instructions on this over on the batboard and also on communications.support.
Search tags: The Professional or Waris Series of radios includes:
HT750 HT1250 HT1550
EX500 EX600 EX560 EX650 PR860
CDM750 CDM1250 CDM1550
HT1250LS+ CDM1550LS+ CDM1550LS
It may be helpful to search using wildcards.
If someone asks a question about one model,
the answer usually pertains to most, if not all.
They are all programmed with HVN9025 CPS.
For what it is worth, the answer to this has been available on these forums for several years. Some simple searching quickly finds these things.