raggydoll did you manage to solve this problem? I have a similar scenario. I have a 2008 Focus ST-2 with Blaupunkt sat nav. The unit failed so I swapped it out for one which had come out of a 2010 Kuga. The unit is a slightly newer version of the same model (memory card for maps instead of dvd) and all connections are the same. However, I get the issue with only some of the buttons lighting up and the dimming working in reverse; lights on - display dimmed; lights off - display bright. Only some of the integrated sat nav functions work too. My local Ford dealer was clueless. It does sound like it needs to be configured to the car - so perhaps IDS programming is the way. I think the Ford dealers interest was zero because they had preferred to charge me over £2k for a replacement unit, so when I sourced my own, they lost interest. Most stuff works - sat nav, radio, cd; just air con and button lights/display dimming that's not. Any help/advice greatly appreciated.
Do you have any updates about this issue? I am facing the same problem and was wondering if there are any solutions to this, other than disabling the "12V Ignition Live" wire (that coming with the manual on/off for the unit and with the lack of the auto-dimming adjustement for the display/buttons backlight; and of course, auto-off after every hour).
@JW1982: is it possible to update the car's computer firmware or something like that, so the mk2/mk2.5 Focus to be able to send this CAN-bus signal?
Thank you for your answer, @JW1982!
You have the wrong type of Blaupunkt radio.
The radio may look the same but is technically a bit different.
So, I guess there is no way to write the SW from a Focus unit to the Mondeo 4 unit...
If not, do you think there is a way to somehow activate the backlight of the buttons with the player start or with the headlights?
Everything works great with these (including the buttons backlight :D), except the fact that the fan speed output of the unit is inverted (so, if the unit says speed=7, the car understands speed=1 and if the unit says speed=1, the car understands speed=7). That means I cannot use the Auto function anymore :(.
Tried the "diag&reset" of the unit, the one with "press Floor + OFF buttons, then Auto to enter calibration mode", but nothing changed. Do you know wether this can be programmed via IDS? Or maybe there are two pins that have to be inverted, but I can't find the pinout for these two sockets. Any help would be appreciated.
Thanks again for the quick answer!
Can you please tell me on which pins should this circuit be inserted? Or if you can, please provide the russian forum link.