Anybody with any experiance with a 1975 250 Alpina. My problem is Ihave no spark once I hook the green wire up to the taillite/brakelite harness. I know that they are intagrated into the ingnition. My ? is does the resister need to be isolated from the frame ground Since I have continuity on all green wires. The brake switch and resister are good. This a US model :bang: :bang: