Sailor, I am impressed with that video! You put a lot of time into that and it shows.
I have an 2004 r1200clc. I recently removed the BMW audio system adding an amp and mp3 plug, and now my Cruise does not engage.
Here is the thing...
On the self diagnostic test everything works as it should. I can hear the faint clicks of the microswitches.
I did have to have the throttle body fixed, last summer but it worked after that.
The only thing I can think of is that when the guy wired the new amplifier, that safety mechanism which turns off the music when accelerating may have something to do with it...
Thank you for the kind words - indeed it was a lot of work to make the video and PDF file as clear as possible to solve majority of cruise-control problems on these BMW. To solve all remaining cases / type of problem would have required to make it way too long or too complex.
BACK TO YOUR PROBLEM:
FIRST a WARNING: main reason why the tutorial (Video and PDF file) says it was mainly applicable to K1200LT and K1200RS is because I did not have access to other models for testing and troubleshooting. However, I am well aware other models (R1200RT, R1200CL…) share many of the K1200LT cruise system components.
On your R1200CL, the major differences are related to the throttle-cables and throttle-bodies arrangement. Cables adjustments and throttle-bodies micro-switch operation cannot be checked the same way as a K1200.
Although I do NOT have a R1200CL here for testing, I was able to check the BMW electrical diagrams AND also a technical note published to dealers when the R1200CL was introduced. Based on these 2 technical documents, and also based on your post, I would suggest to attack your problem with these 2 troubleshooting paths:
1) Is the speed signal reaching the cruise-control unit ?
2) Is the cable from throttle cables junction-box to cruise-unit correctly installed / adjusted?
For the 1st item above: there is no need to go into complex electronic testing unless you have negative results in some/all of the following tests:
a) Can you see the SET Yellow light flashing while you do the last step of the static diag procedure (rear wheel rotation)?
b) When you ride, does you speedo function properly?
c) When you ride, does the self-cancel function of the flashers works?
For the 2nd item above (throttle cables): The control-cables junction box is located behind the fairing and headlight assembly both of which require removal to access it. This cable junction box interconnects four cables with two pulleys. It contains the micro-switch that signals the cruise control module when the throttle is turned in the close direction to cancel cruise function (see attached diagram).
If the cable leading to/from the cruise-control unit is not mounted / adjusted properly, you may find the cruise will not engage while riding EVEN IF all the steps of the static diagnostic appear to be OK. Watch and listen carefully what is going on JUST AFTER you released the brake pedal in step 7 of the static diagnostic: you should see (and hear) the throttle grip move by itself. This will confirm that the cruise-control unit can pull its own cable leading to the throttle junction box.