Hello Everybody ... with the help of Twolanerider (I followed his instructions) I have successfully completed the install of the 07 Harmon Kardon, with Navigation and XM radio, into my 04 FLHTCSE. I must say that these instructions made it a pretty simple install. I have a few items to report out that I think need to be posted for others that do this.
NOW the one caviate, I am unsure if its relivant or not, is that I do not have stock ECM. I run the ThunderMAX closed loop. I have been told that it makes no difference. but for what ever its worth, here is the additional info...
AVC - Automatic volume control works on my bike with the harmon kardon. I located speed sense pin 9 (W/GN) on my original radio main plug, and traced the wire back in the harness to a location near the TAC in the dash, CUT the wire, and connected it to Databus (LGN/V) wire on the TAC, so databus is going to the radio, and it works just fine. I like it so much better with the AVC working.
NAVIGATION - NAV will not work properly without the AVC connected. (It looks like its working, but its not) AVC MUST be connected to the H/K and functional.
CALIBRATION - My radio was removed from an 07, and installed without any BEEPing issues that have been reported in other posts. It was already calibrated in the previous bike. Apparently, if you have a new or referbished radio, you can install it in a 06 or above bike, have the dealer calibrate it, and then install it in eariler models without any issues.
I hope this information is usfull.
Thanks again for a great install procedure.
I hope it was ok to post my followup in Twolaneriders procedure.