Just bought the 2012 CVO Streetglide FLHXSE3 (SESG3). It had the iPod and Boom Audio 400W stereo factory installed and it is working well. I added a RT Zumo 665 to the bike and it is now working flawlessly. A RT Zumo 660 can be used after software update 3.70 or later.
Let's be perfectly clear. The instructions for the Audio NIM are not perfect. My Harley dealership said this could not be done, so I made it happen anyway. With a little patience and persistency, you can too.
To install the BOOM! Audio Navigation Interface Module Kit, so that you can add other accessories like the CB, you will need the following parts.
A.) Zumo 665 GPS Kit (Part Number 76000014) ONLY the Road Tech Zumo 665/660 will work - Don't buy anything else.
B.) BOOM! Audio Navigation Interface Module Kit (Part Number
76000024A). If not the "A" you are jacked.
C.) Connector Kit (Part Number 69200033) + Extra Pins and Sockets. If you are a DIY guy, buy the crimp tool.
D.) R/O and BK/GN (or equivalent) wire and Deutsch Sockets that match connector [6B] in the kit above.
E.) I suggest the Faring Mount but not required.
F.) I suggest you install the REAR AUX input (from a recent post) while you have your bike opened up!

This is how I made things work. BE SURE TO PULL THE MAIN FUSE! You will blow a 15A fuse if you don't.
1.) Unplug connector [291B] and put the Blank Plug (Item 3 on the instructions) and put the blank plugs (item 4) into the holes.
2.) On the new harness, Insert 8 pin socket [185B] into iPod plug [291A].
3.) Remove the following wires and pins from the 35 pin connector [28B], on the back of the radio, and tape them up.
a.) TN/BE from Pin 31
b.) V/GY from pin 19
c.) TN/R from Pin 8
d.) Y/O from Pin 13
e.) Y/V from Pin 14
4.) Follow the instructions to connect the wires from the Audio NIM kit.
5.) Follow the instructions for the Connector Kit (Y/O to Pin 4 AND Y/V to pin 5 on connector [6B]) Now connect the other end, Y/O to Pin 13 and Y/V to Pin 14 on the 35 pin connector [28B].
6.) Here is the tricky part. You must supply power and ground to the new [6B] connector. There may be another way around this but I had to splice (solder) the main harness wires to get these to my [6B] connector.
a.) Splice the BK/GN wire, add a socket pin and insert it into your new [6B] pin 6.
b.) Splice the R/O wire, add a socket pin and insert it into your new [6B] pin 3.
7.) When your new [6B] socket is complete (with 4 wires), connect the [6A] plug from the harness to it. Leave the other [6B] on the NIM harness open for future expansion.
8. As a checksum, you should now have 7 wires added back into [28B] R/BE-pin 4, TN/R-pin 8, Y/O-pin 13, Y/V-pin 14, V/GY-pin 19, BK/BE-pin 27, and TN/BE-pin 31. Your new added [6B] connector should have R/O-pin 3, Y/O-pin 4, Y/V-pin 5, and BK/GN-pin6. You made two splices to R/O and BK/GN in your harness. Make sure the pins are inserted all the way.

NOTE: I suspect that the P&A catalog said that this could not be done, was because of the two splices. The Figure 4 wiring diagram does not show splice SP1 as being connected to harness [185B]-pin 4 and [275B]-pin 3, [6A]-pin3, and [6B]-pin3, but they are. Also keep in mind the connector numbers are different. If you spot an error, please email me or post here. You may have to turn your Intercom on the radio to ON for the NIM to work, but I have not tested this. If you add a CB, you will attach wires to your new [6B] connector pins 1 and 2, later on. Just make a note.
GOOD LUCK AND SAFE RIDING.
PS the Zumo MP3, Phone, and XM all work excellent on the Aux input. When you are using the Navigation, prompts will override AM, FM, CD, WB, AUX, and iPod - and probably your CB when you get it installed.
