Just installed the Smart Siren II on my 08 RKC. I followed the guide and pics posted by Glider....Did it in 5 minutes. I did ask my HD master tech about the 40 amp fuse and disconnecting the battery. He does not pull either the fuse or disconnect the battery as there is no need to(according to him). So I didn't and it worked fine. Thanks Glider for the pics. Now I need to program my remote.