My father has a 1983 Ford 2310 diesel that only has 2000 hours. He had trouble with it starting without moving the gear shifters. The dealer recommended replacing the neutral start switch. After replacement, it started for two weeks. Now it will not even turn over. The warning lights do not illuminate in the gauge cluster either. I tried jumping the terminals on the starter solenoid without success. I checked the switch and wiring for continuity and all are fine. I then began to work both shifters around and boom, it started right up. It starts every time now. Could it be another bad switch or something in shift forks that push the switch in?