ok ok, I will translate it for you:
The plug on top is the black plug on the ECU under the seat.
The pins on the ECU will be connected the following way:
Pin 10 - ignition +12V
Pin 11 - switch 1 (set function)
Pin 15 - ignition +12V
Pin 17 - switch 2 (resume function)
Pin 19 - is only mentioned, that you can connect here the available TD5 tachometer, not used for the cruise control
So the cruise control works by supplying ignition +12V to pin 10/15 permanently and the functions are activated by supplying the same temporary to pin 11 or 17.
For getting the ignition switched +12V (Zuendplus Klemme 15), if I remember correctly, when I had last time my dash off, use the green/white cable at the temperature or fuel gauge in the dash. Put two switches on the dash and run a long cable to the ECU.
More clear now? It works on my TD5
but no guarantee
browny
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