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Ballast has nothing to do with your problem. If it started and dies when you released the key it would be a possible ballast issue. Sounds like the ignition box trigger 12v is on the run position and not the start/run hot position. That is why you can jump start it off the relay with the key in the run position.




The ign1 (run) shuts off during cranking on ign2 (ballast bypass)