I was mounting a bush hog on my old Ford 400 and when I went to restart my tractor was complete dead. After a lot of analysis and going and not so good advice I have discovered the following. When the ignition switch is off I have 12 volts to the solenoid and the hot side of the ignition switch. When I turn on the switch, all power is gone. In tracing the wiring I have found that the solenoid and switch remain powered if I disconnect the small wires on the coil and/or the distributor. What’s my next step. I’m a rank amateur and haven’t been able to find a professional willing to work on the old girl. Thanks for your help. Herman.