Luckily 95% of the electrical stuff works on my '73 F250. However, I came across a very puzzling issue with my neutral safety switch (automatic tranny). When I shift into reverse, the backup lights failed to work.Tested the lights to make sure they were actually working. First thought, bum switch. Drove out to a guy here in Portland who only works on old Ford trucks. We plugged in a switch he had and when slid the pin on the switch, bingo, lights came on. Bought the switch, brought it home installed, and you guessed it, no lights. I tinkered with it for about a half an hour. Finally took it off the column, and moved the light so I could see it. When I slid the pin again the light came on, but only when it was flush against the other end of the switch (so I was going beyond Park before the lights came on). I plugged in my old switch, same thing, had to slid it all the way over. I called my guy, and he was perplexed. Said to bring it back and we would try some other switches. We tried 3 more, all of them did the same thing. He said for all the years, and hundreds of trucks he's worked on, he's never come across anything like this. He even called some of his other very knowledgeable buddies, and no one seems to have an answer. Any of you wizards out there have a solution for me? Or am I stuck hooking up a toggle switch directly to the lights?