@droftarts the H7 should be disabled. The M307 H7 command gives the answer: "Heater 7 is disabled"
Also I have no M501 command in my config.g so there should be no override of the parameters.
In the config.g file I disabled the heater channel after the endstops are defined and before the M558 defines the bltouch as z probe I think this should be fine.
The z probe value is zero when there is a connection and 1000 if there is no connection.
Thank you for your help!
Edit: I just checked all the connections again and the yellow signal cable was not connected properly.
Really sorry for this but again thank you for your fast help!