I have a 2002 flhrci that I was wanting to add a factory security system with a siren. I was reading in a Clymer Repair Manuel that the turn signal module(TSM) and the turn signal security modlule(TSSM) are not interchangeable. However, in the Harley parts catalog it mentioned nothing about this. Is this a problem, and if so how big? I thought it would have been a simple plug-in job. Thanks for any input that you have.