12V 912 Generator wiring Question - Porsche356registry Feb 20, 2010Im putting the final touches to my '63 Super 90 Engine, (tho its more a 912 engine now!) Car is now 12v - Ive the larger 912 12V generator fitted. I notice that theres a brown earth (D) wire ona 6v car from the regulator which attaches via a screw to the body of the 6V generator. Porsche 912 Electrical Problem Solutions | 912 (1965-69 Pictic: Comments: I desperately need a color wiring map/diagram for 68 912 ignition switch 22715 with spades, NOT bullet connectionse are 11 posts/spades and seven wires. Posts are numbered 30,15,54,50 and Po counter closkwise. Switch no longer available so want to adapt a 356A,B,C bullet connector switch.