I've had symptoms similar to what I THINK he's trying to describe - turn to KPIII and there's not only no starter, but also no power at all, to anything, when key goes back to KPII. The problem was, it turned out, a poor connection at a battery terminal which would make just enough contact to power up the lights & radio but I suspect that the draw from the starter caused enough heat through the corrosion to generate a pile of resistance - until it cooled a few moments later, and lights/radio would come back. Pulled off the terminal, cleaned it up & applied some dielectric grease, no further problems. Start with the basics.
--
Chris, Dartmouth NS Canada 70 M-B 280SE, 83 245DL, 84 244 turbo, 90 780 turbo, 92 VW Golf, 90 740 Rex/Regina