[ha_pe_1968]

Have found the solution for my problem. The secound cable at my alternator is for the charging light. To put a didode at the blue-white cable (+ for charging light) was not helping. When puting the diode at the secound cable of the alternation everything work and able to shut off engine again. Sometimes it can be so easy...you only have to try out a lot...maybe it would helps to have more knowledge about electrical too :-)

Thanks a lot Patrick and Blas for helping!!!!

Peter