Neutral safety switch harness boot got hard, and would wiggle loose. I added a ground wire while waiting for the replacement harness. Got the call for my round, car won’t crank. I use the aforementioned external ground, and cranked the car reaching in from the outside. Oops, neutral wiring is fine, THE CAR WAS IN GEAR. Fortunately, it only went driverless for 10 feet and didn’t hit anything.