As you gentlemen know I have had a problem getting my 65 Plymouth Sport Fury to start. I have 727 Automatic Transmission. There is a single wire running from the Starter Relay to the NS switch which I have continuity between the two points. I know that its function is to not allow power to the starter in any other gear other then Park or Neutral. I also know that when the ignition switch is moved from the RUN position from to the START position it sent's a signal to the NS switch and the Starter Relay connecting the BATTERY to the starter therefore engaging the starter starting the engine providing that the car is in PARK or NEUTRAL and if is not and in any other gear the car will not start. So my question is How do I test the Neutral Safety Switch to see If its working.