My car (74 360, 727 trans) won't start in park or neutral. I replaced the neutral safety switch and adjusted the shift linkage (slap stick) per service manual. That didn't seem to work. I replaced the starter relay, that didn't work. If I jump the terminals at the starter relay with the ignition on, it will start. I was reading on a thread that said there should be 12 V to the yellow wire on the starter relay and if you ground the brown wire on the relay and the car starts, there's a problem with the wiring or NSS. Is there a way to test the wiring to the neutral safety switch? I know there are 3 terminals on the NSS. What goes to these terminals, power, ground, back up lights? I noticed that if I jump start the starter relay and drive the car, the car will sometimes start with the ignition key. Any thoughts? Thanks.