The projet continues and is still a challenge, at least to me.
I put it on the bench and got some response, but no cigar.
When I push the actuator button, I get a 4 hz signal on the led but since I don't have a dashboard connection I can't see what the screen would tell me (lightning, hourglass or !), but even that would be incomplete info. I am using a current limiting power supply to avoid getting the dredded smoking of the electronics but I find that the control unit is rather forgiving as I have run multiple tests to the input wires (+12v, grd, foat) and always get the unit to at least respond consistently, unless I fried it the first time I started it up.
Here is the reactions I have found to date:
Small pulse on 12v led (burnt a no resistor led first) on startup then off
Flashing 4 Hz if CS relay disconnected
Flashes 4 hz if CS button depressed after 0.5 sec hesitation/test?
Lights on continuously if CS at limit
I have 4 wires that I cannot find any combination of that works (+12v, grd, open)
so I put a led on them to see how they behaved
I bus wire: strong led (12v?)
Taa wire no signal
Brake relay feed & reverse controler low led (5v or rapid pulses) just like side stand feed that I believe I can wire up properly (although the color codes on your diagram are inverted John)
I was surprised to see that the unit does not use the neutral signal but rather gets its "not in gear" logic from the reverse module. If I read the above signals right, brake relay and reverse controller have a floating input just like the center stand but I can't get the unit to work to test and confirm.
So I am wondering if a used 05+ dashboard might make my day in providing a proper TAA and I-bus hookup?
If not I might just use the led output as a limit detector and hardwire the whole thing.
Alternatively I might use an automotive 12v PLC to copy the logic if anyone knows of a cheap sturdy unit I can get.
Any suggestions are welcome.