CJ3A Direct Short Battery to Block: Ignition Issues

[bmorgil]

Use your Mult-Meter and chase it down. I have money riding on the ignition switch but, there are other possibilities. Yes it is possible that you have a bad connection. Since you know it runs with the jumper wire, you could replace the wire completely from the ignition "Run" terminal to the coil. Make sure if you are using the foot starter pedal the "Start" terminal, if you have one, is not used. There should be nothing hooked to it. If you are using a solenoid the wiring is different. If a new wire does not work replace the switch.

Are you using the foot pedal to engage the starter?