Forgive me if there is a thread out there on this subject. I'm new to the forum and still learning my way around.

I am having a no crank no start problem. When I turn the ignition to the start position, I am getting no crank. I can hear my fuel pump, batteries are fully charged, glow plug light comes on but nothing happens. It acts as if it is gear. I have tried moving the gear shift but still nothing. Now here is the kicker. I can turn the key off and on and eventually it will start. I have replaced the ignition switch and key cylinder but still get the same thing. Sometimes it will start everytime for several days, and then may not start at all for several days. Sometimes turning the key on and off rapidly will cause it to eventually start and sometimes that doesn't work. Sometimes I can let it just sit for a few days and then try it again and it will start right up. It's driving me crazy!

Any ideas? I'm thinking maybe the Neutral Safety Switch??? Thanks for any help!