Hi Jim,

thank You very much for the reply and links. The website in generel was already known to me, but I didn´t find the detail you showed me.
There´s another good website with a lot of illustrations:
http://www.tpocr.com/67fbatconsoleshftipc.html

My conclusion is now, that the Switch for Neutral/Backuplights is missing and it has to be mounted directly at the floor shift. When I bridge the cables pink and light green, the backup lights are on.
So I think, I´ll have to order this part:
https://www.firebirdcentral.com/1967_Firebird_Shifter_Back_Up_Light_Switch_p/das-283.htm

Another special Contact at the Automatic-Gearbox underneath the car , was a single contact with a horseshoe. I connected a cable and pulled it near to the floor shift into the car. Is this the downshift solenoid valve or the downshift solenoid terminal ? For what is that useful and how is it used ?
http://thefirstgensite.com/library/partscounter/illustrated/auto/thmm401.html
-> part 25